光子学报, 2018, 47 (12): 1206001, 网络出版: 2019-01-10
空间光到少模光纤的耦合效率及影响因素
Coupling Efficiency and Influence Factors of Spatial Light into Few-mode Fiber
空间光通信 耦合效率 光纤耦合 少模光纤 前置光放大 相对孔径 随机角抖动 Space optical communication Coupling efficiency Fiber coupling Few-mode fiber Optical preamplifier Relative aperture Random angular jitter
摘要
建立了不同影响因素下空间光-少模光纤耦合效率的理论模型.以两模光纤为例分析了相对孔径对耦合效率的影响, 当相对孔径为0.17时, 耦合效率最高为82.96%.研究了倾斜、离焦、随机角抖动等因素对少模光纤耦合效率的影响.实验测得当横向偏移量为4 μm时, 两模光纤的耦合效率比单模光纤高10.23%; 当轴向偏移量为125 μm时, 两模光纤的耦合效率比单模光纤高11.24%; 当随机抖动幅度标准差为5 μm时, 两模光纤的耦合效率比单模光纤高12.1%.结果表明少模光纤对信号光接收过程中的干扰因素如倾斜、离焦和随机角抖动都有很好的抑制作用.
Abstract
The coupling efficiency theory model of the spatial light into few-mode fiber in the different influence factor is established. Takes two-mode fiber for example to study the relative aperture effect on coupling efficiency. When the relative aperture is 0.17, the highest coupling efficiency is 82.96%. The coupling efficiency in the presence of tilt, defocus and random angular jitter is studied, the experiment show that when the lateral offset is 4 μm, the coupling efficiency of two-mode fiber is higher than single-mode fiber about 10.23%, when the axial offset is 125 μm, the coupling efficiency of two-mode fiber is higher than single-mode fiber about 11.24%, when the random jitter amplitude is 5 μm, the coupling efficiency of two-mode fiber is higher than single-mode fiber about 12.1%. Accordingly, the few-mode fiber can inhibit interference factor such as tilt, defocus and random angular jitter when the signal reception.
王超, 范雪冰, 佟首峰, 李英超, 江伦, 刘壮, 史浩东, 姜会林. 空间光到少模光纤的耦合效率及影响因素[J]. 光子学报, 2018, 47(12): 1206001. WANG Chao, FAN Xue-bing, TONG Shou-feng, LI Ying-chao, JIANG Lun, LIU Zhuang, SHI Hao-dong, JIANG Hui-lin. Coupling Efficiency and Influence Factors of Spatial Light into Few-mode Fiber[J]. ACTA PHOTONICA SINICA, 2018, 47(12): 1206001.