Micro-ring core device and optical soliton generation system

文档序号：1006905 发布日期：2020-10-23 浏览：18次中文

阅读说明：本技术 一种微环芯器件及光孤子产生系统 (Micro-ring core device and optical soliton generation system ) 是由姜校顺肖龙甫赵巾一王瀚肖敏于 2019-04-10 设计创作，主要内容包括：本发明实施例提供一种微环芯器件及光孤子产生系统,微环芯器件包括：微环芯,所述微环芯包括微环芯中间部和微环芯腔,所述微环芯腔围绕所述微环芯中间部一周设置；所述微环芯腔呈环状,环状的所述微环芯腔的外侧半径与内侧半径的差值小于40μm；所述微环芯中间部呈圆盘状,圆盘状的所述微环芯中间部的厚度小于10μm；所述微环芯腔用于产生光孤子。本发明实施例提供一种微环芯器件及光孤子产生系统,以实现提供一种便于集成的光孤子产生器件,并减小光孤子产生器件的体积。(The embodiment of the invention provides a micro-ring core device and an optical soliton generation system, wherein the micro-ring core device comprises: the micro-ring core comprises a micro-ring core middle part and a micro-ring core cavity, and the micro-ring core cavity is arranged around the micro-ring core middle part for one circle; the micro-ring core cavity is annular, and the difference value between the outer radius and the inner radius of the annular micro-ring core cavity is less than 40 micrometers; the middle part of the micro ring core is disc-shaped, and the thickness of the disc-shaped middle part of the micro ring core is less than 10 mu m; the micro-ring core cavity is used for generating optical solitons. The embodiment of the invention provides a micro-ring core device and an optical soliton generation system, so as to provide an optical soliton generation device convenient to integrate and reduce the volume of the optical soliton generation device.)

1. A microring core device, comprising:

the micro-ring core comprises a micro-ring core middle part and a micro-ring core cavity, and the micro-ring core cavity is arranged around the micro-ring core middle part for one circle; the micro-ring core cavity is annular, and the difference value between the outer radius and the inner radius of the annular micro-ring core cavity is less than 40 micrometers; the middle part of the micro ring core is disc-shaped, and the thickness of the disc-shaped middle part of the micro ring core is less than 10 mu m; the micro-ring core cavity is used for generating optical solitons.

2. The microring core device of claim 1 further comprising: a substrate for carrying the micro-ring core; the substrate is made of silicon, and the micro-ring core is made of silicon dioxide.

3. An optical soliton generation system comprising the microring core device of claim 1 or 2;

the optical soliton generation system further comprises a laser source, and light emitted by the laser source is injected into a micro-ring core cavity of the micro-ring core device to generate optical solitons.

4. The optical soliton generation system according to claim 3, wherein the laser source comprises a pump laser and an auxiliary laser, the pump laser emitting pump light, and the auxiliary laser emitting auxiliary light for suppressing thermal effect of the micro-ring core cavity in the micro-ring core device under the action of the pump light.

5. The optical soliton generation system of claim 4, further comprising:

the first optical fiber amplifier is positioned in the light-emitting direction of the pump laser, and the optical input end of the first optical fiber amplifier is connected with the optical path of the pump laser and is used for amplifying the pump light;

the optical input end of the first polarization controller is connected with the optical output end of the first optical fiber amplifier through an optical path and is used for adjusting the polarization state of the pump light; the pump light emitted from the light output end of the first polarization controller is injected into a micro-ring core cavity of the micro-ring core device;

the second optical fiber amplifier is positioned in the light-emitting direction of the auxiliary laser, and the optical input end of the second optical fiber amplifier is in optical path connection with the auxiliary laser and is used for amplifying the auxiliary light;

a second polarization controller, an optical input end of which is optically connected to an optical output end of the second optical fiber amplifier, for adjusting a polarization state of the auxiliary light; and the auxiliary light emitted from the light output end of the second polarization controller is injected into a micro-ring core cavity of the micro-ring core device.

6. The optical soliton generation system of claim 5, further comprising:

the optical input end of the first filter is connected with the optical output end of the first polarization controller through an optical path, and the pump light emitted from the optical output end of the first filter is injected into a micro-ring core cavity of the micro-ring core device and is used for filtering noise caused by the first optical fiber amplifier;

and the optical input end of the second filter is connected with the optical output end of the second polarization controller through an optical path, and the auxiliary light emitted from the optical output end of the second filter is injected into a micro-ring core cavity of the micro-ring core device and is used for filtering noise caused by the second optical fiber amplifier.

7. The optical soliton generation system of claim 5, further comprising:

the optical input end of the first attenuator is connected with the optical output end of the first optical fiber amplifier in an optical path, and the optical output end of the first attenuator is connected with the optical input end of the first polarization controller in an optical path;

and the optical input end of the second attenuator is connected with the optical path of the optical output end of the second optical fiber amplifier, and the optical output end of the second attenuator is connected with the optical path of the optical input end of the second polarization controller.

8. The optical soliton generation system of claim 4, further comprising:

the first circulator comprises a first end, a second end and a third end, the first end is connected with the pump laser optical path, and pump light emitted by the pump laser enters the first circulator from the first end and is injected into a micro-ring core cavity of the micro-ring core device from the second end;

and the second loop device comprises a fourth end, a fifth end and a sixth end, the fourth end is optically connected with the auxiliary laser, and auxiliary light emitted by the auxiliary laser enters the second loop device from the fourth end and is injected into a micro-ring core cavity of the micro-ring core device from the fifth end.

9. The optical soliton generation system of claim 8, further comprising:

the device comprises a first coupler, a first power meter, a fiber cone and an oscilloscope; the optical input end of the first coupler is connected with the optical path of the pump laser, the first optical output end of the first coupler is connected with the first power meter optical path, the second optical output end of the first coupler is connected with the optical path of the first end, the second end of the first coupler is connected with the optical path of the optical fiber cone, the pump light is injected into the micro-ring core cavity of the micro-ring core device through the optical fiber cone, and the third end of the first coupler is connected with the optical path of the oscilloscope;

the second coupler, the second power meter, the third coupler and the spectrometer; the optical input end of the second coupler is connected with the optical path of the auxiliary laser, the first optical output end of the second coupler is connected with the optical path of the second power meter, the second optical output end of the second coupler is connected with the optical path of the fourth end, the fifth end is connected with the optical path of the optical fiber cone, the auxiliary light is injected into the micro-ring core cavity of the micro-ring core device through the optical fiber cone, the sixth end is connected with the optical path of the optical input end of the third coupler, the first optical output end of the third coupler is connected with the optical path of the spectrometer, and the second optical output end of the third coupler is connected with the optical path of the oscilloscope.

10. The optical soliton generation system of claim 3, further comprising a nitrogen box, wherein the nitrogen box includes nitrogen gas in a cavity, and wherein the micro-ring core device is located in the cavity.

Technical Field

The embodiment of the invention relates to an optical soliton technology, in particular to a micro-ring core device and an optical soliton generation system.

Background

An optical soliton is an optical pulse that maintains its shape during propagation. The optical solitons are optical pulses in the time domain, and are comb teeth in the frequency domain, and the comb teeth are coherent in phase. The optical soliton is widely applied to the fields of precision measurement, astronomy, ultrafast spectroscopy, coherent optical communication and the like, and has a very good commercial prospect.

Disclosure of Invention

The embodiment of the invention provides a micro-ring core device and an optical soliton generation system, so as to provide an optical soliton generation device convenient to integrate and reduce the volume of the optical soliton generation device.

In a first aspect, an embodiment of the present invention provides a micro-ring core device, including:

Optionally, the method further comprises: a substrate for carrying the micro-ring core; the substrate is made of silicon, and the micro-ring core is made of silicon dioxide.

In a second aspect, an embodiment of the present invention provides an optical soliton generation system, including the micro-ring core device according to the first aspect;

Optionally, the laser source includes a pump laser and an auxiliary laser, the pump laser emits pump light, and the auxiliary laser emits auxiliary light for suppressing a thermal effect of a micro-ring core cavity in the micro-ring core device under the action of the pump light.

Optionally, the optical soliton generation system further includes:

Optionally, the optical soliton generation system further includes a nitrogen box, the accommodating cavity of the nitrogen box includes nitrogen, and the micro-ring core device is located in the accommodating cavity of the nitrogen box.

In the micro-ring core device provided by the embodiment of the invention, the difference value between the outer radius and the inner radius of the micro-ring core cavity is less than 40 μm, and the thickness of the micro-ring core cavity is smaller, so that the micro-ring core device can be used for generating optical solitons. Since the micro-ring core cavity is a part formed around the middle part of the micro-ring core, the thickness of the micro-ring core cavity is highly related to the middle part of the micro-ring core, and in order to adapt to the thickness of the micro-ring core cavity, the thickness of the middle part of the micro-ring core is set to be less than 10 μm. Compared with a microdisk cavity, the micro-ring core device provided by the embodiment of the invention at least has the following advantages: the surface of the microdisk cavity is rough, the Q value (the Q value is a quality factor of the microcavity, and the higher the Q value, the smoother the microcavity is, and the smaller the dissipation of light inside the microcavity) is low, while the surface of the microdisk cavity needs to be smooth by complex technical treatment to reach the higher Q value, and the treatment technologies of the microdisk cavity, such as etching, cleaning and other surface treatment technologies. These techniques are cumbersome and complex. The micro-ring core cavity can be formed by laser melting of the micro-disk cavity, the surface of the micro-ring core cavity formed by laser melting is smooth, and the Q value is high. The micro-ring core cavity exists in the prior art, but the thickness of the micro-ring core cavity in the prior art is relatively large, the number of light modes is large, light in multiple modes interferes with each other to form mode polarization, and generation of optical solitons is not facilitated. The micro-ring core cavity in the prior art is generally used for enhancing the interaction between light and materials, improving the power density of the light and not easily generating optical solitons. In the face of a micro-ring core cavity with large thickness for power amplification, researchers achieve an unexpected technical effect by changing the thickness of the micro-ring core cavity, namely optical solitons are generated in the micro-ring core cavity for the first time.

Drawings

Fig. 1 is a schematic perspective view of a micro-ring core device according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the micro-toroid core device shown in FIG. 1;

fig. 3 is a schematic structural diagram of an optical soliton generation system according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of the micro-annular core device and the optical fiber taper shown in FIG. 3;

FIG. 5 is a schematic structural diagram of another optical soliton generation system provided by an embodiment of the present invention;

FIG. 6 is a graph of transmittance versus time for pump light and assist light detected using the optical soliton generation system of FIG. 5;

FIG. 7 is a spectral plot of pump light wavelength locked in the blue-shifted region;

fig. 8 is a spectral diagram of the wavelength of the pump light locked in the red-shifted region.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

At present, an instrument mainly generating optical solitons is a mode-locked laser, an additional saturated absorber is needed for the traditional mode-locked laser, and the mode-locked laser is large in size, high in power and not beneficial to integration. In addition, some other structures for generating optical solitons exist in the prior art, for example, a micro disc cavity, a micro column cavity and a microsphere cavity are adopted to generate the optical solitons, but the volume of the micro column cavity and the microsphere cavity is relatively large, and the micro column cavity and the microsphere cavity are not planar structures, cannot be integrated on devices such as a silicon chip and are not beneficial to integration. The process of the micro-disk cavity is very complicated and harsh.

In view of the above problems, an embodiment of the present invention provides a micro-ring core device, fig. 1 is a schematic perspective view of the micro-ring core device provided by an embodiment of the present invention, fig. 2 is a cross-sectional view of the micro-ring core device shown in fig. 1, and referring to fig. 1 and fig. 2, a micro-ring core device 30 includes a micro-ring core 10, the micro-ring core 10 includes a micro-ring core middle portion 11 and a micro-ring core cavity 12, and the micro-ring core cavity 12 is disposed around the micro-ring core middle portion 11. The micro-ring core cavity 12 is annular, and the difference D between the outer radius R2 and the inner radius R1 of the annular micro-ring core cavity 12 is less than 40 μm, namely D is less than 40 μm. The middle part 11 of the micro-ring core is disc-shaped, the thickness of the disc-shaped middle part 11 of the micro-ring core is less than 10 μm, and the micro-ring core cavity 12 is used for generating optical solitons.

In the micro-ring core device provided by the embodiment of the invention, the difference value between the outer radius and the inner radius of the micro-ring core cavity is less than 40 μm, and the thickness of the micro-ring core cavity is smaller, so that the micro-ring core device can be used for generating optical solitons. Since the micro-ring core cavity is a part formed around the middle part of the micro-ring core, the thickness of the micro-ring core cavity is highly related to the middle part of the micro-ring core, and in order to adapt to the thickness of the micro-ring core cavity, the thickness of the middle part of the micro-ring core is set to be less than 10 μm. Compared with a microdisk cavity, the micro-ring core device provided by the embodiment of the invention at least has the following advantages: the surface of the microdisk cavity is rough, the Q value (the Q value is a quality factor of the microcavity, and the higher the Q value, the smoother the microcavity is, and the smaller the dissipation of light inside the microcavity) is low, while the surface of the microdisk cavity needs to be smooth by complex technical treatment to reach the higher Q value, and the treatment technologies of the microdisk cavity, such as etching, cleaning and other surface treatment technologies. These techniques are cumbersome and complex. The micro-ring core cavity can be formed by laser melting of the micro-disk cavity, the surface of the micro-ring core cavity formed by laser melting is smooth, and the Q value is high. The micro-ring core cavity is also existed in the prior art, but the thickness of the micro-ring core cavity in the prior art is larger, the number of light modes is larger, the light of multiple modes interferes with each other to form mode polarization, and therefore, the generation of optical solitons is not facilitated. The micro-ring core cavity in the prior art is generally used for enhancing the interaction between light and materials, improving the power density of the light and not easily generating optical solitons. In the face of a micro-ring core cavity with large thickness for power amplification, researchers achieve an unexpected technical effect by changing the thickness of the micro-ring core cavity, namely optical solitons are generated in the micro-ring core cavity for the first time. According to the micro-ring core device provided by the embodiment of the invention, the optical solitons generated based on the whispering gallery mode optical microcavity can be based on the three-order nonlinear effect of the micro-ring core cavity, so that an additional saturated absorber is not needed, and meanwhile, the micro-ring core device is small in size, low in threshold value, compact in structure and convenient to integrate.

Optionally, referring to fig. 1 and 2, the micro-ring core device 30 further comprises a substrate 20, the substrate 20 being used to carry the micro-ring core 10. The material of the substrate 20 is silicon, and the material of the micro-ring core 10 is silicon dioxide. The micro-ring core 10 may be formed, for example, by oxidizing silicon in the substrate 20 to silicon dioxide. The micro-ring core 10 is integrated on a silicon substrate, and the micro-ring core device can be a silicon integrated device. In other embodiments, the microring core device may be other, for example, integrated devices, such as germanium integrated devices.

The embodiment of the invention also provides an optical soliton generation system which comprises the micro-ring core device in the embodiment. Fig. 3 is a schematic structural diagram of an optical soliton generation system according to an embodiment of the present invention, and referring to fig. 1, fig. 2, and fig. 3, the optical soliton generation system includes a micro-ring core device 30. The optical soliton generation system further comprises a laser source, and light emitted from the laser source is injected into the micro-ring core cavity 12 of the micro-ring core device 30 to generate optical solitons. The laser source may be a semiconductor laser, a fiber laser, or a titanium-sapphire laser, etc.

Alternatively, referring to fig. 3, the laser source includes a pump laser 41 and an auxiliary laser 51, the pump laser 41 emits pump light, and the auxiliary laser 51 emits auxiliary light, for suppressing the thermal effect of the micro-ring core cavity 12 in the micro-ring core device 30 under the action of the pump light. The generation of optical solitons in the microring core cavity 12 requires pumping light in the red-shifted region. When the pump light is injected into the micro-ring core cavity 12, the micro-ring core cavity 12 absorbs heat, and generates a very strong thermal effect. The thermal effect of the micro-ring core cavity 12 under the action of the pump light is more serious for the silica material with large thermo-optic coefficient. In the embodiment of the present invention, the auxiliary laser 51 is arranged to suppress the thermal effect of the micro-ring core cavity 12, that is, the dual-pumping technology is used to suppress the thermal effect of the micro-ring core cavity 12, so that pumping light is facilitated to pump to the red shift region of the micro-ring core cavity 12, and generation of optical solitons in the micro-ring core cavity 12 is facilitated.

Fig. 4 is a schematic structural diagram of the micro-annular core device and the optical fiber taper shown in fig. 3, and referring to fig. 3 and 4, the optical soliton generation system may further include an optical fiber taper 61, the optical fiber taper 61 is relatively close to the micro-annular core cavity 12 in the micro-annular core device 30, so that optical energy may be coupled between the optical fiber taper 61 and the micro-annular core cavity 12. The pump light emitted from the pump laser 41 can be injected into the micro-ring core cavity 12 through the optical fiber taper 61, and the auxiliary light emitted from the auxiliary laser 51 can be injected into the micro-ring core cavity 12 through the optical fiber taper 61. In other embodiments, the pump light and the auxiliary light may be injected into the micro-ring core cavity 12 by using free optical coupling, which is not limited by the embodiment of the present invention.

Optionally, referring to fig. 3, the optical soliton generation system further includes a first fiber amplifier 42, a first polarization controller 44, a second fiber amplifier 52, and a second polarization controller 54. The first optical fiber amplifier 42 is located in the light-emitting direction of the pump laser 41, and the optical input end of the first optical fiber amplifier 42 is optically connected to the pump laser 41 for amplifying the pump light. The optical input of the first polarization controller 44 is optically connected to the optical output of the first fiber amplifier 42 for adjusting the polarization state of the pump light. The pump light exiting the light output end of the first polarization controller 44 is injected into the micro-toroid core cavity 12 of the micro-toroid core device 30. The second optical fiber amplifier 52 is located in the light-emitting direction of the auxiliary laser 51, and the optical input end of the second optical fiber amplifier 52 is optically connected to the auxiliary laser 51 for amplifying the auxiliary light. An optical input of the second polarization controller 54 is optically connected to an optical output of the second fiber amplifier 52 for adjusting the polarization state of the auxiliary light. The auxiliary light exiting the light output end of the second polarization controller 54 is injected into the micro-toroid core cavity 12 of the micro-toroid core device 30. The "optical path connection" in the embodiments of the present invention may be, for example, an optical fiber connection, or an optical path connection generated by free space light irradiation.

Optionally, referring to fig. 3, the optical soliton generation system further includes a first filter 45 and a second filter 55. The optical input end of the first filter 45 is optically connected to the optical output end of the first polarization controller 44, the pump light emitted from the optical output end of the first filter 45 is injected into the micro-ring core cavity 12 of the micro-ring core device 30, and the first filter 45 is used for filtering the noise caused by the first fiber amplifier 42. The optical input end of the second filter 55 is optically connected to the optical output end of the second polarization controller 54, the auxiliary light emitted from the optical output end of the second filter 55 is injected into the micro-ring core cavity 12 of the micro-ring core device 30, and the second filter 55 is used for filtering the noise caused by the second optical fiber amplifier 52.

Optionally, referring to fig. 3, the optical soliton generation system further includes a first attenuator 43 and a second attenuator 53. The optical input of the first attenuator 43 is optically connected to the optical output of the first fiber amplifier 42, and the optical output of the first attenuator 43 is optically connected to the optical input of the first polarization controller 44. The optical input of the second attenuator 53 is optically connected to the optical output of the second fiber amplifier 52, and the optical output of the second attenuator 53 is optically connected to the optical input of the second polarization controller 54. The first attenuator 43 and the second attenuator 53 are light energy control devices, which are beneficial to controlling the light energy of the pumping light and the auxiliary light in the process of generating the optical solitons.

Optionally, referring to fig. 3, the optical soliton generation system further includes a first circulator 46 and a second circulator 56. The first circulator 46 comprises a first terminal 461, a second terminal 462 and a third terminal 463, the first terminal 461 being optically connected to the pump laser 41. The pump light emitted from the pump laser 41 enters the first circulator 46 from the first end 461 and is injected into the micro-ring core cavity 12 of the micro-ring core device 30 from the second end 462. Illustratively, the first end 461 may be optically connected to the pump laser 41 via a first fiber amplifier 42, a first attenuator 43, a first polarization controller 44, and a first filter 45. The second loop element 56 comprises a fourth end 561, a fifth end 562 and a sixth end 563, the fourth end 561 is optically connected to the auxiliary laser 51, and the auxiliary light emitted from the auxiliary laser 51 enters the second loop element 56 from the fourth end 561 and is injected into the micro-ring core cavity 12 of the micro-ring core device 30 from the fifth end 562. The fourth terminal 561 may be optically connected to the auxiliary laser 51, for example, via a second fiber amplifier 52, a second attenuator 53, a second polarization controller 54, and a second filter 55. The second end 462 of the first loop element 46 and the fifth end 562 of the second loop element 56 may be optically connected to the same optical fiber taper 61, and the pump light emitted from the pump laser 41 and the auxiliary light emitted from the auxiliary laser 51 are injected into the micro-ring core cavity 12 of the micro-ring core device 30 from two opposite ends of the optical fiber taper 61, respectively, so as to avoid mutual interference between the pump light and the auxiliary light.

The pump light emitted from the pump laser 41 passes through the first end 461 and the second end 462 of the first loop device 46, and then passes through the optical fiber taper 61, and when the pump light propagates through the optical fiber taper 61, the pump light is injected into the micro-ring core cavity 12 of the micro-ring core device 30, and generates an optical soliton, and the generated optical soliton passes through the optical fiber taper 61 and the fifth end 562, and then is emitted from the sixth end 563.

Optionally, referring to fig. 3, the optical soliton generation system further includes a nitrogen box 62, the receiving cavity of the nitrogen box 62 includes nitrogen, and the micro-ring core device 30 is located in the receiving cavity of the nitrogen box 62. The micro-annular core device 30 is protected by nitrogen in the nitrogen box 62 to provide a nitrogen environment to prevent interference.

Fig. 5 is a schematic structural diagram of another optical soliton generation system according to an embodiment of the present invention, and referring to fig. 5, the optical soliton generation system further includes a first coupler 71, a first power meter 72, an optical fiber taper 61, and an oscilloscope 73. The optical input of the first coupler 71 is optically connected to the pump laser 41. The optical input of the first coupler 71 may be optically connected to the pump laser 41 via the first fiber amplifier 42, the first attenuator 43, the first polarization controller 44 and the first filter 45. The first optical output end of the first coupler 71 is optically connected to the first power meter 72, the second optical output end of the first coupler 71 is optically connected to the first end 461, the second end 462 is optically connected to the optical fiber taper 61, the pump light is injected into the micro-ring core cavity 12 of the micro-ring core device 30 through the optical fiber taper 61, and the third end 463 is optically connected to the oscilloscope 73. The optical soliton generation system also includes a second coupler 74, a second power meter 75, a third coupler 76, and a spectrometer 77. The optical input of the second coupler 74 is optically connected to the auxiliary laser 51. Illustratively, the optical input of the second coupler 74 is optically connected to the secondary laser 51 via the second fiber amplifier 52, the second attenuator 53, the second polarization controller 54, and the second filter 55. The first optical output end of the second coupler 74 is connected with the optical path of the second power meter 75, the second optical output end of the second coupler 74 is connected with the optical path of the fourth end 561, the fifth end 562 is connected with the optical path of the optical fiber taper 61, and injects the auxiliary light into the micro-ring core cavity 12 of the micro-ring core device 30 through the optical fiber taper 61, the sixth end 563 is connected with the optical input end optical path of the third coupler 76, the first optical output end of the third coupler 76 is connected with the optical path of the spectrometer 77, and the second optical output end of the third coupler 76 is connected with the optical path of the oscilloscope 73.

Alternatively, referring to fig. 5, the optical soliton generation system may further include a first detector PD1 and a second detector PD2 connected to the oscilloscope 73. The first detector PD1 and the second detector PD2 may convert the detected optical signals into electrical signals and transmit the electrical signals to the oscilloscope 73. The optical path connection with the oscilloscope 73 in the embodiments of the present invention means the optical path connection with a photodetection device electrically connected to the oscilloscope 73. The auxiliary light emitted from the auxiliary laser 51 passes through the fourth end 561 and the fifth end 562 of the second loop device 56, then propagates to the second end 462 of the first loop device 46 via the fiber taper 61, and is emitted from the third end 463 of the first loop device 46 to the first detector PD1, and is detected by the first detector PD 1. The pump light emitted from the pump laser 41 passes through the first end 461 and the second end 462 of the first loop element 46, propagates to the fifth end 562 of the second loop element 56 via the fiber taper 61, is emitted from the sixth end 563 of the second loop element 56 to the second detector PD2, and is detected by the second detector PD 2.

Fig. 6 is a graph showing the transmittance of the pump light and the auxiliary light detected by using the optical soliton generation system shown in fig. 5 as a function of time, fig. 7 is a graph showing the wavelength of the pump light locked in a blue shift region, fig. 8 is a graph showing the wavelength of the pump light locked in a red shift region, and referring to fig. 6, 7 and 8, the center wavelength of the cavity mode of the auxiliary light selected in the experiment is 1554.64nm, the center wavelength of the cavity mode of the pump light is 1558.3nm, the material of the micro-ring core 10 is silicon dioxide, the outer radius R2 of the annular micro-ring core cavity 12 is 195 μm, the difference between the outer radius and the inner radius of the annular micro-ring core cavity is 23 μm, and the thickness of the middle part 11 of the micro-ring core is 8 μm. The left side of the dashed line in the transmission spectrum indicates the blue-shifted region of the pump cavity mode (i.e., the mode of the pump light in the micro-ring core cavity 12), and the right side of the dashed line indicates the red-shifted region of the pump cavity mode. When the pump light is in the blue-shifted region of the pump cavity mode,the spectrum appearing at this time is a chaotic spectrum, and the comb phases are incoherent, as shown in fig. 7. When the pump light is in the red shift region of the pump cavity mode, the optical soliton is generated, and the shape of the spectrum is sech²The pattern, as shown in FIG. 8, is phase coherent between the comb teeth. From fig. 6, it can also be seen that the pump light is in the blue-shifted region of the pump cavity mode, and the noise is very large at this time, and is very small in the red-shifted region of the pump cavity mode, which conforms to the characteristics of the chaotic optical comb and the optical soliton.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

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