31 August 2017 Coherent optical communication detection device based on modified balanced optical phase-locked loop
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Abstract
In the field of satellite communication, space laser communication technology is famous for its high communication rate, good confidentiality, small size, low power consumption and so on. The design of coherent optical communication detection device based on modified balanced optical phase-locked loop (OPLL) is presented in the paper. It combined by local oscillator beam, modulator, voltage controlled oscillator, signal beam, optical filter, 180 degree hybrid, balanced detector, loop filter and signal receiver. Local oscillator beam and voltage controlled oscillator trace the phase variation of signal beam simultaneously. That taking the advantage of voltage controlled oscillator which responses sensitively and tunable local oscillator laser source with large tuning range can trace the phase variation of signal beam rapidly and achieve phase locking. The demand of the phase deviation is very low, and the system is easy to adjust. When the transmitter transmits the binary phase shift keying (BPSK) signal, the receiver can demodulate the baseband signal quickly, which has important significance for the free space coherent laser communication.
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Bo Zhang, Bo Zhang, Jianfeng Sun, Jianfeng Sun, Mengmeng Xu, Mengmeng Xu, Guangyuan Li, Guangyuan Li, Guo Zhang, Guo Zhang, Chenzhe Lao, Chenzhe Lao, Hongyu He, Hongyu He, Zhiyong Lu, Zhiyong Lu, } "Coherent optical communication detection device based on modified balanced optical phase-locked loop", Proc. SPIE 10408, Laser Communication and Propagation through the Atmosphere and Oceans VI, 1040811 (31 August 2017); doi: 10.1117/12.2270941; https://doi.org/10.1117/12.2270941
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