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Proceedings Paper

The performance of coherent receiver controlled by the phase lock loop in dual rate free-space laser communication
Author(s): Xiaoping Ma; Jianfeng Sun; Peipei Hou; Wei Lu; Qian Xu; Liren Liu
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Paper 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.

Paper Details

Date Published: 4 September 2015
PDF: 8 pages
Proc. SPIE 9614, Laser Communication and Propagation through the Atmosphere and Oceans IV, 96140T (4 September 2015); doi: 10.1117/12.2187226
Show Author Affiliations
Xiaoping Ma, Shanghai Institute of Optics and Fine Mechanics (China)
Jianfeng Sun, Shanghai Institute of Optics and Fine Mechanics (China)
Peipei Hou, Shanghai Institute of Optics and Fine Mechanics (China)
Wei Lu, Shanghai Institute of Optics and Fine Mechanics (China)
Qian Xu, Shanghai Institute of Optics and Fine Mechanics (China)
Liren Liu, Shanghai Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 9614:
Laser Communication and Propagation through the Atmosphere and Oceans IV
Alexander M. J. van Eijk; Christopher C. Davis; Stephen M. Hammel, Editor(s)

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