阅读说明：本技术 光信号放大装置和传输系统 (Optical signal amplifying device and transmission system ) 是由 曾冰梅 陶金涛 付成鹏 余春平 乐孟辉 于 2020-03-25 设计创作，主要内容包括：本申请实施例公开了一种光信号放大装置和传输系统,所述装置包括：拉曼放大单元和正色散补偿单元,其中,所述正色散补偿单元设置在增益单元与所述拉曼放大单元之间；所述拉曼放大单元,用于产生泵浦光,所述泵浦光在增益单元内对输入的光信号进行放大；所述正色散补偿单元,用于对所述泵浦光进行正向色散补偿。如此,达到了抑制四波混频,保证了光信号的正常放大的目的。同时,该装置能够减弱四波混频带来的信道串扰,增强系统的性能,提高非零色散位移光纤中的泵浦利用率。(The embodiment of the application discloses optical signal amplification device and transmission system, the device includes: the Raman amplification unit and the positive dispersion compensation unit are arranged between the gain unit and the Raman amplification unit; the Raman amplification unit is used for generating pump light, and the pump light is used for amplifying an input optical signal in the gain unit; and the positive dispersion compensation unit is used for carrying out positive dispersion compensation on the pump light. Therefore, the purposes of inhibiting four-wave mixing and ensuring normal amplification of optical signals are achieved. Meanwhile, the device can weaken channel crosstalk caused by four-wave mixing, enhance the performance of a system and improve the pumping utilization rate in the non-zero dispersion displacement optical fiber.)

1. An optical signal amplification device, the device comprising: the Raman amplification unit and the positive dispersion compensation unit are arranged between the gain unit and the Raman amplification unit;

the Raman amplification unit is used for generating pump light, and the pump light is used for amplifying an input optical signal in the gain unit;

and the positive dispersion compensation unit is used for carrying out positive dispersion compensation on the pump light.

2. The apparatus of claim 1, wherein the positive dispersion compensation unit is further configured to perform positive dispersion compensation on the input optical signal.

3. The apparatus of claim 2, wherein the input optical signal and the pump light are input to the gain unit through the positive dispersion compensation unit;

after the input optical signal and the pump light pass through the positive dispersion compensation unit, the input optical signal is amplified in the gain unit under the action of the pump light.

4. The apparatus of claim 3, wherein the Raman amplification unit comprises: a first pump source and a first wavelength division multiplexer;

the first pump source is used for generating the pump light;

the pump light and the input optical signal sequentially pass through the first wavelength division multiplexer and the positive dispersion compensation unit and then are input into the gain unit, and the pump light amplifies the input optical signal in the gain unit.

5. The apparatus of claim 4, wherein the Raman amplification unit further comprises: the detector comprises a first coupler, a first detector, a second coupler and a second detector;

the first coupler is used for coupling a first part of the input optical signals to the first detector and inputting a second part of the input optical signals to the first wavelength division multiplexer;

the second coupler is used for coupling a first part of the pump light to the second detector and inputting a second part of the pump light to the first wavelength division multiplexer;

and after the second part of optical signals and the second part of pump light pass through the positive dispersion compensation unit, the second part of optical signals and the second part of pump light are amplified in the gain unit under the action of the second part of pump light.

6. The apparatus of claim 1, wherein the positive dispersion compensation unit is further configured to perform positive dispersion compensation on the amplified optical signal.

7. The apparatus according to claim 6, wherein the pump light passes through the positive dispersion compensation unit, the input optical signal is amplified in the gain unit, and the amplified optical signal is input to the positive dispersion compensation unit.

8. The apparatus of claim 7, wherein the Raman amplification unit comprises: a second pump source and a second wavelength division multiplexer;

the second pumping source is used for generating the pumping light;

the pump light is sequentially input to the gain unit through the second wavelength division multiplexer and the positive dispersion compensation unit, the pump light amplifies the input optical signal in the gain unit, and the amplified optical signal is input to the second wavelength division multiplexer after passing through the positive dispersion compensation unit.

9. The apparatus of claim 8, wherein the raman amplification unit further comprises: the third coupler, the fourth coupler, the fifth coupler, the third wavelength division multiplexer, the third detector, the fourth detector, the fifth detector and the sixth detector;

the third coupler is used for coupling a first part of the pump light to the third detector and inputting a second part of the pump light to the second wavelength division multiplexer;

the second part of pump light is input to the gain unit through the second wavelength division multiplexer and the positive dispersion compensation unit in sequence, the second part of pump light amplifies the input optical signal in the gain unit, and the amplified optical signal is input to the second wavelength division multiplexer after passing through the positive dispersion compensation unit;

after the amplified optical signal passes through the positive dispersion compensation unit, the amplified optical signal is transmitted to the fourth coupler through the second wavelength division multiplexer;

the fourth coupler is configured to couple a first part of the amplified optical signals to the fourth detector, and input a second part of the amplified optical signals to the third wavelength division multiplexer;

the third wavelength division multiplexer is used for separating part of out-of-band amplified spontaneous emission ASE signals in the second part of the amplified optical signals and transmitting the part of out-of-band ASE signals to the fifth detector;

the second part of optical signals are input to the fifth coupler through the third wavelength division multiplexer, and the second part of optical signals are output through the fifth coupler;

the fifth coupler is configured to couple a portion of the output optical signal to the sixth detector.

10. A transmission system comprising an optical signal amplification device according to any one of claims 1 to 9 and a gain unit.