用于光纤时间和频率同步的拉曼/掺铒光纤放大器混合双向放大器

Raman/EDFA hybrid bidirectional amplifier for fiber-optic time and frequency synchronization.

作者信息

Mu Kuanlin, Zhao Zhuoze, Wang Zhengkang, Shang Jianmin, Yu Song, Qiao Yaojun

出版信息

Opt Express. 2021 Mar 1;29(5):6356-6367. doi: 10.1364/OE.414499.

Abstract

Herein, we verify that a Raman/EDFA hybrid amplifier can improve the stability of fiber-optic time and frequency synchronization systems compared to the Er-doped fiber amplifier (EDFA), owing to its higher gain and lower noise figure (NF) performance. We studied the variation law of Raman gain efficiency for a fiber Raman amplifier (FRA) as a function of pump power and input signal power, designed a bidirectional Raman/EDFA hybrid amplifier, and proved that equivalent NF below 0 dB can be obtained. Finally, hybrid amplifiers were compared to EDFAs in a free-running frequency synchronization system. The transfer stabilities reached 1.9678 × 10/1 s and 2.0248 × 10/1 s when FRA + EDFA and EDFA + FRA configurations were used, respectively, both exhibiting better performance than the stability of 3.0905 × 10/1 s obtained by EDFA.

摘要

在此，我们验证了与掺铒光纤放大器（EDFA）相比，拉曼/EDFA混合放大器能够提高光纤时间和频率同步系统的稳定性，这归因于其更高的增益和更低的噪声系数（NF）性能。我们研究了光纤拉曼放大器（FRA）的拉曼增益效率随泵浦功率和输入信号功率的变化规律，设计了一种双向拉曼/EDFA混合放大器，并证明可以获得低于0 dB的等效NF。最后，在自由运行频率同步系统中，将混合放大器与EDFA进行了比较。当分别采用FRA + EDFA和EDFA + FRA配置时，传输稳定性分别达到1.9678×10⁻¹ s和2.0248×10⁻¹ s，两者均表现出比EDFA获得的3.0905×10⁻¹ s的稳定性更好的性能。