The performance of coherent receiver controlled by the phase lock loop in dual rate free-space laser communication

Xiaoping Ma; Jianfeng Sun; Peipei Hou; Wei Lu; Qian Xu; Liren Liu

doi:10.1117/12.2187226

4 September 2015 The performance of coherent receiver controlled by the phase lock loop in dual rate free-space laser communication

Xiaoping Ma, Jianfeng Sun, Peipei Hou, Wei Lu, Qian Xu, Liren Liu

Author Affiliations +

Proceedings Volume 9614, Laser Communication and Propagation through the Atmosphere and Oceans IV; 96140T (2015) https://doi.org/10.1117/12.2187226
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

Abstract

The technique of differential phase shift keying(DPSK) modulation is applied into demodulating phase information in the coherent optical receiver. The dual rate free-space receiving structure on the base of Mach-Zehnder delay interferometer with the lens is used suitably for differential delay which is equal to the one bit corresponding to a certain data rate. Delay distance at the interference receiver is varied with transmission rata from satellite to ground. Differential information is obtained by the subtraction of the two successive wave-front phases when made to interfere. The phase demodulation is extremely sensitive to phase fluctuation. Because of the incident light through atmospheric turbulence, the wave-front of optical signal became jittered in the temporal and spatial domain rapidly. In the paper, the dual rate free-space laser communication receiver for phase lock to stable signal light phase is proposed, increasing the homodyne efficiency and decreasing the bit error rate.

Citation Download Citation

Xiaoping Ma, Jianfeng Sun, Peipei Hou, Wei Lu, Qian Xu, and Liren Liu "The performance of coherent receiver controlled by the phase lock loop in dual rate free-space laser communication", Proc. SPIE 9614, Laser Communication and Propagation through the Atmosphere and Oceans IV, 96140T (4 September 2015); https://doi.org/10.1117/12.2187226

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