Performance Analysis and Optimization of Partially Coherent Optical Communication Links Through Atmospheric Channel
CHEN Chun-yi, YANG Hua-min, JIANG Hui-lin, FENG Xin, WANG Hui
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Key Laboratory of Ministry of Education for Photoelectric Measuring & Control and Optical Information Transfer Technology,Changchun University of Science and Technology,Changchun,Jilin 130022,China
Focusing on intensity-modulation/ direct-detection (IM/DD) partially coherent optical links using the on-off-keying scheme,the analytic models of channel capacity,channel bit-error-rate and link outage probability were established.On the basis of these models,the calculations of channel capacity,channel bit-error-rate and link outage probability for both fully and partially coherent optical links were performed,and then the comparative analysis for the two types of links was presented.The optimization model for the initial coherent degree of a laser was proposed with the situation when the transmitted power was limited.The performance of optical links through atmospheric turbulence using partially coherent beams is better than fully coherent beams,and propagation using a partially coherent beam is an effective technique for mitigating the turbulence-induced impact.