Chinese Optics Letters, 2017, 15 (3): 031201, Published Online: Jul. 25, 2018   

Fault monitoring in passive optical network using code division multiplex-based dual-OTDR traces comparison Download: 815次

Author Affiliations
1 Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
2 Accelink Technologies Co., LTD, Wuhan 430074, China
3 State Key Laboratory of Optical Communication Technologies and Networks, Wuhan Research Institute of MPT, Wuhan 430074, China
Abstract
A dual optical time domain reflectometry (OTDR) system, which employs two different continuous waves at the optical line terminal and a pair of fiber Bragg gratings at the end of each optical network unit, is proposed in a time-division multiplexing passive optical network (PON). The proposed scheme accomplishes the fiber fault monitoring by comparing the different wavelength’s testing curves. Complete complementary code is utilized to measure multiple wavelength signals simultaneously with only one receiver and to improve the dynamic range of this system. The PON system consisting of 20 km feeding fiber and a 1:16 splitter is investigated by the experiments. The experimental results show that the faulty branch can be successfully identified by using our scheme. What is more, we also demonstrate that our scheme can be applied to the multi-stage PON.

Yuxing Yuan, Wei Li, Jilong Han, Qiguang Feng, Haitao Yao, Qiang Zheng, Qianggao Hu, Shaohua Yu. Fault monitoring in passive optical network using code division multiplex-based dual-OTDR traces comparison[J]. Chinese Optics Letters, 2017, 15(3): 031201.

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