Acta Optica Sinica, Volume. 40, Issue 14, 1406003(2020)
A Real-Time Polarization Compensation System Based on Wavelength-Division Multiplexing for Optical Fiber Communication Systems
The polarization states of the optical signals transmitted through optical fibers change randomly because of the influence of the external environment. Therefore, a real-time polarization compensation module must be inserted into the optical fiber communication systems, such as the polarization multiplexing communication system and the polarization encoding fiber quantum key distribution(QKD) system, to compensate the polarization changes that can be attributed to the random birefringence effect in optical fibers. Thus, the stable operation of the corresponding communication system can be ensured. In this study, an experimental system that can compensate for the variation of the polarization states in real time is proposed according to the polarization compensation system based on wavelength-division multiplexing in optical fibers. In this system, two reference lights with conjugated polarization states are prepared and an integrated polarization detector is used for detecting the changing polarization states in real time. This system can be applied to the optical fiber communication systems. The experimental results show that when this system is applied to a QKD system, continuous and stable operation can be achieved at a transmission distance of 5 km for more than 8 h with a quantum bit error rate of 1.96%.
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Yuan Huang, Jiayu Zhao, Jindong Wang, Cong Du, Qingxuan Peng, Yiping Yuan, Yingyu Chen, Yafei Yu, Zhengjun Wei, Zhiming Zhang. A Real-Time Polarization Compensation System Based on Wavelength-Division Multiplexing for Optical Fiber Communication Systems[J]. Acta Optica Sinica, 2020, 40(14): 1406003
Category: Fiber Optics and Optical Communications
Received: Mar. 3, 2020
Accepted: Apr. 20, 2020
Published Online: Jul. 23, 2020
The Author Email: Wang Jindong (wangjindong@m.scnu.edu.cn)