阅读说明：本技术 中继器和中继方法 (Repeater and trunking method ) 是由 见上聪 于 2018-04-05 设计创作，主要内容包括：[问题]要提供一种具有可以以灵活的方式控制激发光功率的继电器。[解决方案]一种继电器具有：激发光供应装置,所述激发光供应装置生成激发光；第一组合装置,所述第一组合装置将激发光与第一波分复用光信号组合；第二组合装置,所述第二组合装置将激发光与第二波分复用光信号组合；第一放大装置,所述第一放大装置使用激发光放大第一波分复用光信号；第二放大装置,所述第二放大装置使用激发光放大第二波分复用光信号；以及控制装置,所述控制装置基于第一波分复用光信号和第二波分复用光信号中的至少一个的波长信息,控制输出到第一和第二组合装置的激发光的功率。([problem] will provide a kind of with the relay that can control excitation light power in a flexible way.A kind of [solution] relay includes exciting light feeding mechanism, and the exciting light feeding mechanism generates exciting light；First combination device, the first combination device combine exciting light with the first wavelength-division-multiplexed optical signal；Second combination unit, second combination unit combine exciting light with the second wavelength-division-multiplexed optical signal；First amplifying device, first amplifying device divide multiplexing optical signal using excitation light amplification first wave；Second amplifying device, second amplifying device use excitation the second wavelength-division-multiplexed optical signal of light amplification；And control device, wavelength information of the control device based at least one of the first wavelength-division-multiplexed optical signal and the second wavelength-division-multiplexed optical signal, control are output to the power of the exciting light of the first and second combination units.)

1. a kind of repeater, comprising:

Pump light feeding mechanism, the pump light feeding mechanism is for generating pump light；

First multiplexer, first multiplexer is for being multiplexed the pump light and the first wavelength-division-multiplexed optical signal；

Second multiplexer, second multiplexer is for being multiplexed the pump light and the second wavelength-division-multiplexed optical signal；

First amplifying device, first amplifying device are used for by using the first wavelength division multiplexed light described in the pumping light amplification Signal；

Second amplifying device, second amplifying device are used for by using the second wavelength division multiplexed light described in the pumping light amplification Signal；And

Control device, the control device are used for based on about first wavelength-division-multiplexed optical signal and second wavelength-division multiplex The wavelength information of at least one of optical signal, control are output to the institute of first multiplexer and second multiplexer State the power of pump light.

2. repeater according to claim 1, wherein the wavelength information includes believing about first wavelength division multiplexed light Number number of wavelengths information, about first wavelength-division-multiplexed optical signal wavelength band information, about second wavelength-division In the information of the number of wavelengths of multiplexing optical signal and the information of the wavelength band about second wavelength-division-multiplexed optical signal extremely One item missing.

3. repeater according to claim 1 or 2, wherein the pump light feeding mechanism includes generating the pump light Pump light source and for the output of the pump light source to be assigned to first multiplexer and second multiplexer Distributor.

4. repeater according to claim 3,

Wherein, the distributor is the coupler with variable branch's ratio, and

The control device is based on the wavelength information, controls branch's ratio of the coupler.

5. repeater according to claim 3, wherein the distributor includes:

First coupler, first coupler couples the output of the pump light source and output is coupled from multiple ports Light；

Second coupler, the second coupler coupling input light and by the light output coupled to it is described first multiplexing fill It sets；

Third coupler, the third coupler coupling input light and by the light output coupled to it is described second multiplexing fill It sets；And

Switch, the switch pump light exported from first coupler can be output to second coupler or The third coupler.

6. repeater according to claim 5, further comprises:

Variable optical attenuator, the variable optical attenuator be located at the output of first coupler, second coupler it is defeated At least one position with the output of the third coupler in out,

Wherein, the control device is based on the wavelength information, controls the decaying of the variable optical attenuator.

7. repeater according to claim 3, wherein the distributor includes:

First coupler, first coupler couples the output of the pump light source and output is coupled from multiple ports Light；

Second coupler, the second coupler coupling input light and by the light output coupled to first multiplexer With second multiplexer；

Third coupler, the third coupler coupling input light and exports coupled light；And

Switch, the switch pump light exported from first coupler can be output to second coupler or The third coupler.

8. repeater according to claim 3,

Wherein, the pump light source generates the light beam for the pump light for having wavelength different from each other, and

The distributor includes:

Third multiplexer, the third multiplexer is for wavelength multiplexing input light and by the light output being multiplexed described in First multiplexer；

4th multiplexer, the 4th multiplexer is for wavelength multiplexing input light and described in the light output that will be multiplexed arrives Second multiplexer；And

Switch, the switch pump light inputted from the pump light source can be output to second multiplexer or The third multiplexer.

9. further comprising to repeater described in any one in 8 according to claim 1:

Branch unit, the branch unit is for separating first wavelength-division-multiplexed optical signal and second wavelength division multiplexed light letter At least one of number；And

Monitoring arrangement, the monitoring arrangement are used to extract the wavelength information of the optical signal separated by the branch unit, and And extracted wavelength information is output to the control device.

10. further comprising to repeater described in any one in 8 according to claim 1:

Branch unit, the branch unit is for separating first wavelength-division-multiplexed optical signal and second wavelength division multiplexed light letter At least one of number；And

Signal extracting device is controlled, the control signal extracting device is used to mention from the optical signal separated by the branch unit It is orientated the pumping that the pump light feeding mechanism order is output to first multiplexer and second multiplexer The control signal of the power of light, and extracted control signal is output to the control device.

11. a kind of communication system, comprising:

First land terminal equipment, the first land terminal equipment export the first wavelength-division-multiplexed optical signal；

Second land terminal equipment, the second land terminal equipment export the second wavelength-division-multiplexed optical signal；And

According to claim 1 to repeater described in any one in 10.

12. a kind of trunking method, comprising:

Generate pump light；

It is multiplexed the pump light and the first wavelength-division-multiplexed optical signal；

It is multiplexed the pump light and the second wavelength-division-multiplexed optical signal；

By using the first wavelength-division-multiplexed optical signal described in the pumping light amplification；

By using the second wavelength-division-multiplexed optical signal described in the pumping light amplification；

Obtain the wavelength information of at least one of first wavelength-division-multiplexed optical signal and second wavelength-division-multiplexed optical signal； And

Based on the wavelength information, the power of the pump light is controlled.

13. a kind of recording medium, the program for repeater of the recording medium storage record on it, described program make institute The computer stated in repeater executes:

Obtain the process of the wavelength information of at least one of the first wavelength-division-multiplexed optical signal and the second wavelength-division-multiplexed optical signal；With And

Based on the wavelength information, the power of first wavelength-division-multiplexed optical signal and second wavelength-division-multiplexed optical signal is controlled Process.

Technical field

The present invention relates to repeaters and trunking method, more particularly to the optical repeater including image intensifer and are relayed using light The trunking method of device.

Background technique

Figure 14 is the schematic diagram for showing the configuration example of common undersea optical communications system 900.In order to by optical signal from land Ground terminal device 901 is transferred to land terminal equipment 902, and arrangement each includes the repeater 903 of image intensifer.Repeater 903 Amplify the optical signal power reduced by spread fiber.

Figure 15 is the schematic diagram for showing the configuration example for the image intensifer 904 for including in repeater 903.Image intensifer 904 Generally include pump laser diode (LD) 905, Er-doped fiber (EDF) 906 and Multiplexing Unit 907 as amplification medium. The optical signal (for example, wavelength-division-multiplexed optical signal) of 907 multiplexing transmission of Multiplexing Unit and the pump light exported from pumping LD 905.In The pumping optical pumping EDF 906 being multiplexed in Multiplexing Unit 907 with optical signal.

Need to pump the reliability and repeater 903 of the enhancing of LD 905 in image intensifer 904 illustrated in fig. 15 Reduced power consumption and reduced area occupied.It therefore, the use of include include two image intensifers for pumping LD It configures or includes the configuration that pump light is assigned to two image intensifers.Related to the present invention, PTL 1 to 3, which is described, to be pumped Pu light is assigned to the technology of multiple image intensifers.

Reference listing

Patent document

PTL 1:WO 2012/053320

PTL 2: Japanese Unexamined Patent Application Publication No.2013-123205

PTL 3: Japanese Unexamined Patent Application Publication No.2003-174417

Summary of the invention

Technical problem

Undersea optical communications system 900 needs neatly changing for the function in such as switching optical path path needed according to communication Become the function of setting, or changes the number of wavelengths for the wavelength-division-multiplexed optical signal being multiplexed in optical fiber or the function of wavelength band. Moreover it is preferred that even if including in wavelength-division-multiplexed optical signal when the number of wavelengths of wavelength-division-multiplexed optical signal or wavelength band change The peak power of each carrier wave also keep constant.Due to this needs to flexibility and power, repeater 903 is constituted Image intensifer 904 needs the wavelength-division-multiplexed optical signal according to each optical fiber transmission by constituting undersea optical communications system 900 Number of wavelengths and wavelength band in variation pumping light power flexible control.

Goal of the invention

The object of the present invention is to provide the repeaters that can neatly control pumping light power.

Solution to the problem

Repeater of the invention includes: pump light feeding mechanism, and the pump light feeding mechanism is for generating pump light；The One multiplexer, first multiplexer is for being multiplexed pump light and the first wavelength-division-multiplexed optical signal；Second multiplexer, institute The second multiplexer is stated for being multiplexed pump light and the second wavelength-division-multiplexed optical signal；First amplifying device, the first amplification dress It sets for dividing multiplexing optical signal by using pumping light amplification first wave；Second amplifying device, second amplifying device are used for By using pumping the second wavelength-division-multiplexed optical signal of light amplification；And control device, the control device are used for based on about the The wavelength information of one wavelength-division-multiplexed optical signal and the second wavelength-division-multiplexed optical signal, control are output to the first multiplexer and second and answer With the pumping light power of device.

Trunking method of the invention includes: generation pump light；It is multiplexed pump light and the first wavelength-division-multiplexed optical signal；Multiplexing pump Pu light and the second wavelength-division-multiplexed optical signal；Divide multiplexing optical signal by using pumping light amplification first wave；By using pump light Amplify the second wavelength-division-multiplexed optical signal；Obtain the wavelength information of the first wavelength-division-multiplexed optical signal and the second wavelength-division-multiplexed optical signal； And pumping light power is controlled based on wavelength information.

Beneficial effects of the present invention

The present invention can provide the repeater that can neatly control pumping light power.

Detailed description of the invention

Fig. 1 is the block diagram for showing the configuration example of the undersea optical communications system 10 according to the first example embodiment.

Fig. 2 is the block diagram for showing the configuration example of the repeater 100 according to the first example embodiment.

Fig. 3 is the exemplary schematic diagram for showing the control process of the repeater 100 according to the first example embodiment.

Fig. 4 is the block diagram for showing the configuration example of the repeater 200 according to the second example embodiment.

Fig. 5 is the block diagram for showing the configuration example of pump light supply unit 121.

Fig. 6 is the block diagram for showing the configuration example of pump light supply unit 122.

Fig. 7 is the block diagram for showing the configuration example of pump light supply unit 123.

Fig. 8 is the block diagram for showing the configuration example of pump light supply unit 124.

Fig. 9 is the block diagram for showing the configuration example of pump light supply unit 125.

Figure 10 is the block diagram for showing the configuration example of pump light supply unit 126.

Figure 11 is the block diagram for showing the configuration example of the repeater 300 according to third example embodiment.

Figure 12 is the block diagram for showing the configuration example of the undersea optical communications system 20 according to the 4th example embodiment.

Figure 13 is the block diagram for showing the configuration example of the repeater 400 according to the 4th example embodiment.

Figure 14 is the block diagram for showing the configuration example of common undersea optical communications system 900.

Figure 15 is the schematic diagram for showing the configuration example of common image intensifer 904.

Specific embodiment

Example embodiments of the present invention is described below.In the description of example embodiment and attached drawing, previously described portion Part is endowed identical reference marker, therefore omits wherein repeated description.

The first example embodiment

Fig. 1 is the block diagram for showing the configuration example of undersea optical communications system 10 of the first example embodiment according to the present invention. Undersea optical communications system 10 includes land terminal equipment 101 and 102 (the first and second land terminal equipment) and repeater 100. Each repeater 100 including image intensifer is disposed on sea bed at a predetermined interval.Land terminal equipment 101 and 102 and Repeater 100 is connected by fiber optic cables.Repeater 100 amplifies the optical signal power reduced by spread fiber.

Wavelength-division multiplex (WDM) optical signal is transmitted between land terminal equipment 101 and land terminal equipment 102.On land There are two transmission line systems between terminal device 101 and land terminal equipment 102, each system is described as system (SYS) 1 With SYS 2.What it is by SYS1 transmission wdm optical signal (the first wavelength-division-multiplexed optical signal) and the wdm optical signal that is transmitted by SYS 2 The direction of (the second wavelength-division-multiplexed optical signal) can be same or different.In addition, the WDM light letter transmitted by SYS 1 Number and can be same or different by each of the number of wavelengths of the wdm optical signal transmitted of SYS 2 and wavelength band.

Fig. 2 is the block diagram for showing the configuration example of the repeater 100 according to the first example embodiment.Repeater 100 includes Control unit 110, pump light supply unit 120, Multiplexing Unit 131 and 132 and amplifying unit 141 and 142.

Pump light supply unit 120 is used as the pump light feeding mechanism for generating pump light.The effect of Multiplexing Unit 131 In the first multiplexer of multiplexing pump light and the first wavelength-division-multiplexed optical signal.Multiplexing Unit 132, which is used as, is used for multiplexing pump Pu light With the second multiplexer of the second wavelength-division-multiplexed optical signal.Amplifying unit 141 is used as being amplified the by using pump light First amplifying device of one wavelength-division-multiplexed optical signal.Amplifying unit 142 is used as being amplified the second wave by using pump light Divide the second amplifying device of multiplexing optical signal.Control unit 110 is used as based on about the first and second wavelength division multiplexed lights letter Number the information (hereinafter referred to as " wavelength information ") of wavelength control the function of the pump light for being output to the first and second multiplexers The control device of rate (hereinafter referred to as " pumping light power ").

The repeater 100 including above content in Fig. 2 has the function as image intensifer.Note that due to usually Know the configuration of the function for monitoring for the optical signal realized in repeater 100 and the control function of power supply, therefore is omitted therein It showing in attached drawing and describes.

The wdm optical signal that the amplification of repeater 100 is transmitted by two optical transmission line SYS 1 and SYS 2.Pump light supply is single Member 120 includes at least one pump light source.Pump light supply unit 120 is supplied pump light by Multiplexing Unit 131 or 132 To amplifying unit 141 and 142.

Control unit 110 controls the pump light that amplifying unit 141 and 142 is supplied to by pump light supply unit 120.Control Unit 110 distributes to 131 He of Multiplexing Unit based on the wavelength information of the wdm optical signal by SYS 1 and SYS 2 transmission to control The optical power of 132 pump light.Each Multiplexing Unit 131 and 132 is multiplexed the pump light exported by pump light supply unit 120 With the wdm optical signal of input.Photo-coupler (directional coupler), lightwave length complexer or wavelength-selective switches (WSS) can be used Make each of Multiplexing Unit 131 and 132.Each of amplifying unit 141 and 142 be amplification medium and amplify have from The wdm optical signal for the pump light that pump light supply unit 120 is supplied.

Fig. 3 is the example according to the flow chart of the operation of the control unit 110 of the first example embodiment.Control unit 110 Obtain the wavelength information (the step S01 in Fig. 3) of the wdm optical signal of at least one transmission by SYS 1 and SYS 2.Then, Pump light (the step of power of 110 order pump light supply unit 120 of the control unit supply based on acquired wavelength information S02)。

Pump light supply unit 120 is to the output of Multiplexing Unit 131 and 132 in based on the order from control unit 110 Power pump light.The pumping light power for being output to each Multiplexing Unit 131 and 132 can be different from each other.Amplifying unit 141 Wdm optical signal, and the signal amplified from the output of repeater 100 are amplified according to the pumping light power of supply with each of 142. Control unit 110 may include the computer of such as central processing unit (CPU), and the storage dress of such as semiconductor memory It sets, as hardware.It is then possible to which being executed by CPU is that the storage computer program in the storage device of process in Fig. 3 mentions For the function of control unit 110.

Repeater 100 with this configuration controls pump light supply unit based on the wavelength information of wdm optical signal 120, and therefore can neatly control pumping light power.

Second example embodiment

Fig. 4 is the block diagram for showing the configuration example of the repeater 200 according to the second example embodiment.Repeater 200 is The embodiment of repeater 100 described in one example embodiment.Repeater 200 includes Er-doped fiber (EDF) 143 and 144 conduct Amplifying unit 141 and 142 in Fig. 2.SYS 1 and SYS 2 is different line, and is, for example, that land is connected at two positions The uplink and downlink of terminal device 101 and 102.The two lines for connecting this land terminal equipment can be referred to as " Dong-west Line " and " Xi-east line ".

According to this example embodiment, the transmission direction of SYS 1 and SYS 2 can be identical.In addition, SYS 1 and SYS 2 The wavelength and wavelength band of different number can be used.For example, SYS1 can transmit C band wdm optical signal, and SYS 2 can be passed Defeated L band wdm optical signal." C band " refers to the wavelength band about from 1530nm to 1565nm, and " L band " refer to about from The wavelength band of 1570nm to 1610nm.

The pumping light power for being supplied to SYS 1 and SYS 2 from pump light supply unit 120 is controlled, so that passing through SYS 1 There is predetermined value with the peak power of each carrier wave of the wdm optical signal transmitted of SYS 2.By the peak power sets of each carrier wave Changed for pumping light power needed for predetermined value by the wavelength information of wdm optical signal.Therefore, control unit 110 stores WDM light letter Number wavelength information and pump light needed for the carrier wave of wdm optical signal corresponding with wavelength information is amplified to predetermined peak power Relationship between power.Believe for example, control unit 110 can internally be stored in advance with the wavelength of the wdm optical signal in service Related pumping LD power is ceased as table.Pumping LD will be in Fig. 5 and later middle description.Control unit 110 can use conduct The setting wavelength information of the wdm optical signal of keyword searches for pumping light power in the table.Can in an installation when device 200 by The wavelength information of the setting wdm optical signal of control unit 110.The wave of setting can be changed by the maintenance work of repeater 200 Long message.Control unit 110 obtain wdm optical signal setting wavelength information and order pump light supply unit 120 come supply with Information-related pumping light power.Pump light supply unit 120 is defeated by the pump light in the power ordered by control unit 110 Multiplexing Unit 131 and 132 is arrived out.Using this configuration, pump light supply unit 120 provides the flexible control of pumping light power.

Information about number of wavelengths and the wavelength band about wdm optical signal will be described in this exemplary embodiment and later Information wavelength information the case where.However, wavelength information can be the wavelength information by the wdm optical signal of SYS 1 and lead to Cross any of wavelength information of wdm optical signal of SYS 2 or both.In addition, wavelength information can be the wave of wdm optical signal Any of information of long quantity and wavelength information or both.In other words, wavelength information includes the WDM by SYS 1 The number of wavelengths information of optical signal, wavelength information by the wdm optical signal of SYS 1, the wdm optical signal by SYS 2 At least one of in number of wavelengths information and the wavelength information for passing through the wdm optical signal of SYS 2.

The concrete configuration example of pump light supply unit 120 is described as pump light supply unit 121 to 126 below.Fig. 5 It is the block diagram for showing the configuration example of pump light supply unit 121.Pump light supply unit 121 includes pump laser diode (LD) 221 and 222 and allocation unit 231.By control unit 110 based on about the WDM light transmitted by SYS 1 and SYS 2 The number of wavelengths of signal and the information of wavelength band control the power of each of pumping LD 221 and 222.With in 0.98 μ The pumping LD of wavelength in m wavelength band or in 1.48 mum wavelength bands may be used as each of pumping LD 221 and 222.It can Only to pump one in LD 221 and 222；However, tool allows the redundancy for pumping LD there are two pumping LD and increases pump light Power.Pumping LD is used as the pump light source that EDF 143 and 144 generates pump light.

Allocation unit 231 is used as the distributor that Multiplexing Unit 131 and 132 is distributed to for the output by pump light source. The pump light of input is assigned to the Multiplexing Unit 132 on the Multiplexing Unit 131 and SYS 2 on SYS 1 by allocation unit 231.Example Such as, allocation unit 231 is 2 × 2 photo-couplers.However, as by described in this exemplary embodiment and later, allocation unit 231 are not limited to 2 × 2 photo-couplers.

Information of the pump light supply unit 121 based on number of wavelengths and wavelength band about wdm optical signal is pumped by control Pu LD 221 and 222 provides the flexible control of pumping light power.

Fig. 6 is the block diagram for showing the configuration example of pump light supply unit 122.Pump light supply unit 122 includes pumping LD 221 and 222 and variable branch coupler 232.It, can only pumping LD 221 similar to pump light supply unit 121 With one in 222.

Variable branch coupler 232 is the coupler with variable branch's ratio, and control unit 110 is based on about wave Long quantity and the information of wavelength band control the power of pumping LD 221 and 222 and the branching ratio of variable branch coupler 232 Rate.In other words, pump light supply unit 122 can change the ratio distributed between SYS 1 and the pumping light power of SYS 2 Rate.Therefore, even if when the number of wavelengths of the wdm optical signal between SYS 1 and SYS 2 and not identical wavelength band, pump light is supplied Answer unit 122 that pump light can be neatly assigned to SYS 1 and SYS 2, so that the peak power that each carrier wave will be used for It is set as predetermined value.Known 2 × 2 coupler of optical-waveguide-type for using Mach-Zehnder interferometer is as variable branch coupler 232 specific example.

Therefore, pump light supply unit 122 provides the flexible of pumping light power by using variable branch coupler 232 Control.

Fig. 7 is the block diagram for showing the configuration example of pump light supply unit 123.Pump light supply unit 123 includes four Pump LD 221 to 224, coupler 240 (the first coupler), coupler 261 and 262 (second and third coupler), Yi Jikai Close 250.Coupler 240,261 and 262, and switch 250 correspond to the allocation unit 231 in Fig. 5.Coupler 240 is that have 4 × 6 photo-couplers of 4 input ports and 6 output ports, switch 250 are that have 6 input ports and 12 output ports 6 × 12 photoswitches.Each of coupler 261 and coupler 262 are that have 6 input ports and 1 output port 12 × 1 photo-couplers.Port number in Fig. 7 is example.Configuration in Fig. 7 be typically denoted as N pumping LD 221 to 22N, The output of coupling pumping LD 221 to 22N and from N × M photo-coupler 240 of the signal of multiple port output couplings, M × 2M light Switch 250 and the photo-coupler of 2M × 1 261 and 262.N is natural number, and M is greater than or equal to 2 natural number.

In other words, there are M optical paths between coupler 240 and switch 250, and in switch 250 and coupler 261 Between and between switch 250 and coupler 262 there is also M optical paths.The N beam that the coupling of coupler 240 is exported from pumping LD Pump light, and the light beam of coupling is divided into M output beam.Switch 250 can switch internal connection in this way, to incite somebody to action Each of M input light beam of pump light is output to one in coupler 261 and coupler 262.261 He of coupler 262 couple the pump beam connecting with switch 250 and the light of coupling are respectively outputted to Multiplexing Unit 131 and 132.Fig. 7 is shown The case where N=4 and M=6.

Based on the information of number of wavelengths and wavelength band about wdm optical signal, the control of control unit 110 pumping LD 221 to 224 power, and also select the input port and output port that are connected by switch 250.By being alternatively coupled to coupler 261 With the port number of the pump light of coupler 262, switch 250 can control the pump light function for distributing to Multiplexing Unit 131 and 132 Rate and ratio between the two.For example, pump light is output to four ports on coupler 261 by switch 250 in Fig. 7, And pump light is output to two ports on coupler 262.Therefore, it is output to the pumping of the Multiplexing Unit 131 on SYS 1 Optical power is twice of the Multiplexing Unit being output on SYS 2.By increaseing or decreasing the pump beam connected by switch 250 Quantity, pump light supply unit 123 can be independently increased or reduce the pumping light power for being supplied to SYS 1 and SYS 2.

Two optical paths can be provided between switch 250 and coupler 261, two optical paths can be configured with polarization and keep Optical fiber, and 2 × 1 polarized combination couplers can be used as coupler 261.Light is kept from two polarizations by polarized combination The pump light of the general power of pump beam inputted there are two tools can be output to by the pump beam of fibre output, coupler 261 Multiplexing Unit 131.Similarly, by the way that switch 250 is connected to coupler 262 by two polarization-maintaining fibers and is closed using polarization At coupler as coupler 262, the pump light of the general power with pump light input light beam can be output to by coupler 262 Multiplexing Unit 132.

Therefore, by control switch 250, pump light supply unit 123 provides the flexible control of pumping light power.

Fig. 8 is the block diagram for showing the configuration example of pump light supply unit 124.In addition to matching for pump light supply unit 123 Except setting, pump light supply unit 124 further includes variable optical attenuator (VOA) 291 to 293.VOA 291 can be each light Road adjusts the pumping light power for being input to switch 250.VOA 292 and 293 can be adjusted respectively to be exported from coupler 261 and 262 Pumping light power.Control unit 110 controls declining for VOA 291 to 293 based on the information about number of wavelengths and wavelength band Subtract.Using this configuration, pump light supply unit 124 can precisely control pump light.

Pump light supply unit 124 may include at least one of VOA 291 to 293.VOA can be installed in pumping Between LD 221 to 224 and the output of coupler 261.

Fig. 9 is the block diagram for showing the configuration example of pump light supply unit 125.Pump light supply unit 125 includes four Pump LD 221 to 224, coupler 241,242,263 and 264, and switch 251.Coupler 241,242,263 and 264, And switch 251 corresponds to the allocation unit 231 in Fig. 5.Each of coupler 241,242,263 and 264 is 2 × 2 light Coupler, and switch 251 is 4 × 4 photoswitches.There are two optical paths between switch 251 and coupler 263, and are opening There is also two optical paths between pass 251 and coupler 264.

Since each of coupler 263 and 264 is 2 × 2 photo-couplers, the output of coupler 263 can be exported Output to SYS 1 and SYS 2, and coupler 264 can be used as 3 He of SYS being included in as other transmission lines The pumping light output of amplifying unit on SYS 4.

One of the pump beam inputted from coupler 241 is output to 251 property of can choose of switch coupler 263 or coupling Clutch 264.In addition, 251 property of can choose of switch one of the pump beam inputted from coupler 242 is output to coupler 264 or coupler 263.Using this configuration, pump light supply unit 125 can be distributed the output for pumping LD 221 to 224 To coupler 263 and coupler 264.For example, in the case where pumping LD 223 or 224 breaks down, when the inside of switch 251 When with connection as shown by the solid line, the pumping light power exported from coupler 264 reduces.In this case, pass through control The mode of switch 251, so as to by the output destination of one of the input from coupler 241 shown in dotted line from coupler 263 change to coupler 264, can compensate the reduction for being input to 264 pumping light power of coupler.Therefore, can inhibit to supply To the reduction of the pumping light power of SYS 3 and SYS 4.Similarly, it when pumping LD 221 or 222 breaks down, can control Switch 251 a, so that output of coupler 242 is output to coupler 263.

Control unit 110 execute pumping LD 221 to 224 mode of operation acquisition, pump LD power control and The control of switch 251.Control unit 110 can internally store the letter of the number of wavelengths and wavelength band about wdm optical signal in advance The function of breath, the mode of operation of pumping LD 221 to 224 and pumping LD 221 to 224 relevant to the switch state of switch 251 Rate, as table.Control unit 110 can use wdm optical signal wavelength information, pump LD 221 to 224 mode of operation, And the switch state of switch 251 searches for the pumping light power in table as keyword.

Pumping LD 221 and pumping LD 222 can be operated simultaneously or can be configured in this way, so that only pumping LD 221 is operated under normal operation, and is executed when another breaks down and be switched to pumping LD 222.This is equally applicable In pumping LD 223 and 224.

Therefore, pump light supply unit 125 provides pump light function by control pumping LD 221 to 224 and switch 251 The flexible control of rate.

Figure 10 is the block diagram for showing the configuration example of pump light supply unit 126.281 He of switch 252 and multiplexer 282 (the third and fourth multiplexers) correspond to the allocation unit 231 in Fig. 5.The pump light generated by pumping LD 271 to 274 The wavelength X 1 of beam is different from each other to λ 4.Switch 252 is that there are four 4 × 8 photoswitches of input and eight outputs for tool.Switch 252 Four in output are connected to multiplexer 281, and four are connected to multiplexer 282.Each of multiplexer 281 and 282 Pump beam that wavelength multiplexing is inputted from switch 252 simultaneously exports multiplexed optical.

Based on the information of number of wavelengths and wavelength band about wdm optical signal, the control of control unit 110 pumping LD 271 to 274 power, and the connection between the input port and output port of also switching switch 252.Switch 252 can pass through selection Wavelength and the quantity of the pump beam of multiplexer 281 and 282 are connected to control the pump light function for being assigned to SYS 1 and SYS 2 Rate and its ratio.Specifically, switch 252 selects one to four light beams in the pump beam (wavelength X 1 arrives λ 4) of four inputs simultaneously Selected one or more light beams are output to multiplexer 281, and select one from remaining one or more pump beams Multiplexer 282 is output to four light beams and by selected one or more light beams.Figure 10, which is shown, carrys out self- pomped LD 271 To 273, (pump beam of wavelength X 1 to λ 3) are output to Multiplexing Unit 131, and carry out the pump of self- pomped LD 274 (wavelength X 4) Pu light beam is output to the example of Multiplexing Unit 132.

By control switch 252, control unit 110 can choose the pump light for being input to multiplexer 281 and be input to The pump light of multiplexer 282.When the power for pumping each of LD 271 to 274 is roughly equal, it is supplied to 1 He of SYS The pumping light power of each of SYS 2 is substantially proportional to the quantity of pump beam selected by switch 252.With this The pump light supply unit 126 of configuration will can also neatly be controlled by selection by the quantity of the pump beam of wavelength-division multiplex Pumping light power.

Figure 11 is the block diagram for showing the configuration example of the repeater 300 according to third example embodiment.In addition to according to second Except the configuration of the repeater 200 of example embodiment, repeater 300 further includes branch units 310 and monitoring unit 320.Branch Unit 310 is used as branch unit, for separating in the wdm optical signal by SYS 1 and the wdm optical signal for passing through SYS 2 extremely It is one few.

The separation of branch units 310 passes through the part for the wdm optical signal that SYS 1 is propagated, and isolated signal is output to prison Depending on unit 320.Monitoring unit 320 detects the wavelength band of the number of wavelengths and wdm optical signal that include in wdm optical signal.This function It can be provided by the optical filter and light receiving element of such as WSS.Specifically, monitoring unit 320 is identified by the propagation of SYS 1 Optical signal wavelength information, and by result notice to control unit 110.

The letter that wavelength information, monitoring unit 320 of the control unit 110 based on the wdm optical signal propagated by SYS 1 notify It ceases and indicates the table of pumping light power relevant to wavelength information to control pump light supply unit 120.Above-mentioned pump light supplies One in unit 121 to 126 is answered to may be used as pump light supply unit 120.In addition, also passing through the transmission line in 2 side SYS Upper installation branch units 310 and monitoring unit 320, control unit 110 can be based on about the WDM light letters on SYS 1 and SYS 2 Number information, from wdm optical signal detect information, to control pump light supply unit 120.

Repeater 300 can information with Direct Recognition about the wdm optical signal of actual propagation.Therefore, repeater 300 is not only Pumping light power can be neatly controlled, and can also be held when number of wavelengths and the wavelength band change in wdm optical signal The preferred control of row pumping light power.

Figure 12 is the block diagram for showing the configuration example of the undersea optical communications system 20 according to the 4th example embodiment.It is connected to Land terminal equipment 101 or 102 or Network Management System that be connected to undersea optical communications system 20 send control signals to Repeater 400.Repeater 400 extracts control signal and notifies control signal to control unit 110.Control signal include about The information of number of wavelengths and wavelength band, or about the information for being command by the pumping light power to pump light supply unit 120.

Figure 13 is the block diagram for showing the configuration example of the repeater 400 according to the 4th example embodiment.Branch units 310 divides Control signal extraction unit 330 is output to from the wdm optical signal propagated by SYS 1, and by isolated signal.Control signal quilt It is superimposed upon on wdm optical signal.Control signal is transmitted by the low frequency modulations of the carrier wave or wdm optical signal that are not used in the wavelength of communication. Control signal extraction unit 330 extracts control signal by using wavelength filter or low-pass filter, and control is believed Number notice to control unit 110.It controls signal extraction unit 330 and is used as control signal extracting device, the control signal extraction Device is used to extract control signal from by the isolated wdm optical signal of branch units 310, and the control signal is supplied to pump light Unit 120 orders the pumping light power that be output to Multiplexing Unit 131 and 132, and the control signal of extraction is output to control Unit 110 processed.

Control unit 110 controls pump light supply unit 120 based on the information for including in control signal.In addition, also logical It crosses and is used for transmission the branch units 310 and control signal extraction unit 330 of line in the installation of 2 side SYS, it is real to be similar to third example Example is applied, control unit 110 can control pump based on the control signal detected from wdm optical signal by SYS 1 and SYS 2 Pu light supply unit 120.The arrow for the control signal being attached in Figure 12 and Figure 13 does not limit the direction of control signal.

It is controlled according to the repeater 400 of the 4th example embodiment by using the control signal extracted from wdm optical signal Pumping light power.Therefore, repeater 400 can neatly control pumping light power, and in addition, be not required in repeater 400 It include the table for controlling pumping light power based on the number of wavelengths of wdm optical signal and wavelength band.

All or part example embodiment disclosed above can be described as, but be not limited to, and be attached below.

(note 1)

A kind of repeater, comprising:

Pump light feeding mechanism, the pump light feeding mechanism is for generating pump light；

First multiplexer, first multiplexer is for being multiplexed pump light and the first wavelength-division-multiplexed optical signal；

Second multiplexer, second multiplexer is for being multiplexed pump light and the second wavelength-division-multiplexed optical signal；

First amplifying device, first amplifying device are used to believe by using pumping light amplification first wave point multiplexed optical Number；

Second amplifying device, second amplifying device are used for by using pumping the second wavelength division multiplexed light of light amplification letter Number；And

Control device, the control device are used for based on about the first wavelength-division-multiplexed optical signal and the second wavelength division multiplexed light letter Number at least one of wavelength information, control is output to the pumping light power of the first multiplexer and the second multiplexer.

(note 2)

According to repeater described in note 1, wherein wavelength information includes the number of wavelengths about the first wavelength-division-multiplexed optical signal The information of amount, about the first wavelength-division-multiplexed optical signal wavelength band information, about the number of wavelengths of the second wavelength-division-multiplexed optical signal At least one of in the information of amount and the information of the wavelength band about the second wavelength-division-multiplexed optical signal.

(note 3)

According to repeater described in note 1 or 2, wherein pump light feeding mechanism includes the pump light source for generating pump light With the distributor for being assigned to the first multiplexer and the second multiplexer for the output by pump light source.

(note 4)

According to repeater described in note 3,

Wherein, distributor is the coupler with variable branch's ratio, and

Control device is based on wavelength information, controls branch's ratio of coupler.

(note 5)

According to repeater described in note 3, wherein distributor includes:

First coupler, the output of the first coupler coupling pumping light source and output is coupled from multiple ports Light；

Second coupler, the second coupler coupling input light and by the light output coupled to the first multiplexer；

Third coupler, the third coupler coupling input light and by the light output coupled to the second multiplexer； And

The pump light exported from the first coupler can be output to the second coupler or third coupling by switch, the switch Device.

(note 6)

According to repeater described in note 5, further comprise

Variable optical attenuator, the variable optical attenuator be located at the output of the first coupler, the output of the second coupler and At least one position in the output of third coupler,

Wherein, decaying of the control device based on wavelength information control variable optical attenuator.

(note 7)

According to repeater described in note 3, wherein distributor includes:

First coupler, the output of the first coupler coupling pumping light source and output is coupled from multiple ports Light；

Second coupler, the second coupler coupling input light and by the light output coupled to the first multiplexer and Second multiplexer；

Third coupler, the third coupler coupling input light simultaneously export coupled light；And

The pump light exported from the first coupler can be output to the second coupler or third coupling by switch, the switch Device.

(note 8)

According to repeater described in note 3,

Wherein, pump light source generates the pump beam for having wavelength different from each other, and

Distributor includes:

Third multiplexer, the third multiplexer is for wavelength multiplexing input light and by the light output being multiplexed to the One multiplexer；

4th multiplexer, the 4th multiplexer is for wavelength multiplexing input light and the light output that will be multiplexed is to the Two multiplexers；And

The pump light inputted from pump light source can be output to the second multiplexer or third multiplexing by switch, the switch Device.

(note 9)

According to repeater described in any one in note 1 to 8, further comprise:

Branch unit, the branch unit is for separating in the first wavelength-division-multiplexed optical signal and the second wavelength-division-multiplexed optical signal At least one；And

Monitoring arrangement, the monitoring arrangement are used to extract the wavelength information of the optical signal separated by branch unit, and by institute The wavelength information of extraction is output to control device.

(note 10)

According to repeater described in any one in note 1 to 8, further comprise:

Branch unit, the branch unit is for separating in the first wavelength-division-multiplexed optical signal and the second wavelength-division-multiplexed optical signal At least one；And

Signal extracting device is controlled, the control signal extracting device is used to mention from the optical signal separated by branch unit Orientation pump light feeding mechanism order is output to the control signal of the pumping light power of the first multiplexer and the second multiplexer, And extracted control signal is output to control device.

(note 11)

A kind of communication system, comprising:

First land terminal equipment, the first land terminal equipment export the first wavelength-division-multiplexed optical signal；

Second land terminal equipment, the second land terminal equipment export the second wavelength-division-multiplexed optical signal；And

According to repeater described in any one in note 1 to 10.

(note 12)

A kind of trunking method, comprising:

Generate pump light；

It is multiplexed pump light and the first wavelength-division-multiplexed optical signal；

It is multiplexed pump light and the second wavelength-division-multiplexed optical signal；

Divide multiplexing optical signal by using pumping light amplification first wave；

By using pumping the second wavelength-division-multiplexed optical signal of light amplification；

Obtain the wavelength information of at least one of the first wavelength-division-multiplexed optical signal and the second wavelength-division-multiplexed optical signal；And

Pumping light power is controlled based on wavelength information.

(note 13)

A kind of recording medium, the program for repeater of the recording medium storage record on it, described program make Computer in repeater executes:

Obtain the mistake of the wavelength information of at least one of the first wavelength-division-multiplexed optical signal and the second wavelength-division-multiplexed optical signal Journey；And

Based on wavelength information, the process of the power of the first wavelength-division-multiplexed optical signal and the second wavelength-division-multiplexed optical signal is controlled.

Although the present invention is specifically illustrated and described by reference to example embodiments of the present invention, the present invention is not limited to These embodiments.It will be appreciated by the skilled addressee that not departing from the spirit and model of the invention being defined by the claims In the case where enclosing, various changes can be carried out in form and details.

The application based on and require submitted on April 10th, 2017 Japanese patent application No.2017-077321 it is preferential Power, the disclosure of which are incorporated herein by reference in their entirety.

List of reference signs

10,20,900 undersea optical communications system

100 to 400,903 repeaters

101,102,901,902 land terminal equipment

110 control units

120 to 126 pump light supply units

131,132,907 Multiplexing Unit

141 amplifying units

221 to 22N, 271 to 274,905 pumping LD

231 allocation units

232 variable branch couplers

240 to 242,261 to 264 couplers

250 to 252 switches

281,282 multiplexer

310 branch units

320 monitoring units

330 control signal extraction units

904 image intensifers