光学精密工程2017，Vol.25Issue(7)：1748-1756,9.DOI:10.3788/OPE.20172507.1748
空间光混频器分光性能的分析与优化
Analysis and optimization of splitting performance for space optical hybrid
摘要
Abstract
Signal light splitting ratio of space optical hybrid was optimized in order to further improve received sensitivities of homodyne coherent optical communication systems.According to the mathematical model of homodyne coherent communication systems,mathematical expression of signal light splitting ratio,loop phase error and bit error rate (BER) was deduced.Through calculation and analysis,it indicated that when signal light of Q branch for optical hybrid met the requirement of phase-locked loop,Bit Error Rate (BER) could be reduced and received sensitivity could be improved by improving the signal light splitting ratio of Ⅰ branch.The optical coherent efficiency increased by 53.5 ％ and the communication detection sensitivity increased by 3 dB after optimization of the splitting ratio.Eye diagrams and power of phase noise of the system at different splitting ratios were obtained by modeling and simulation with VPI software.The simulation results show that the detection sensitivity is improved by 2.83 dB.Finally,a table experiment system of homodyne coherent optical communication was built to study influence rules of splitting ratio of space optical hybrid,system error rate and phase-locked loop.When splitting ratio decreases from 0.5 to 0.2,system error rate declines from 3.53× 10-9 to 4.25× 10-10.When splitting ratio is 0.1,phase-locked loop loses efficacy and the bit error rate is 1.The experiment results conform to the theory and simulation results basically,and the influence rules and optimization results of splitting ratio will provide technical references for development of space homodyne coherent communication systems.关键词
零差相干光通信/光混频器/分光比/相位噪声/散粒噪声/光混频效率Key words
homodyne coherent optical communication/optical hybrid/splitting ratio/phase noise/shot noise/heterodyne efficiency分类
信息技术与安全科学引用本文复制引用
南航,张鹏,佟首峰,刘洋,郝世聪,常帅,范雪冰..空间光混频器分光性能的分析与优化[J].光学精密工程,2017,25(7):1748-1756,9.基金项目
国家自然科学基金资助项目(No.91438204) （No.91438204）
吉林省教育厅基金资助项目(吉教科合字,2015,第77号) （吉教科合字,2015,第77号）
吉林省优秀青年人才项目(No.20170520161JH) （No.20170520161JH）
