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基于偏振消光的全光纤衰减器

All Fiber Attenuator Based on Polarization Extinction
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摘要 提出了一种基于偏振消光原理的新型连续可调全光纤衰减器,用琼斯矩阵方法分析了保偏光纤偏振器组合的衰减器的衰减原理,模拟分析了偏振器的消光比对衰减器的动态范围的影响。实验证明用分辨率为5 000 step/rotation的伺服电机和两个消光比为30 dB的保偏光纤偏振器组成的衰减器能获得27 dB的衰减动态范围、0.126%的光强分辨率和0.5 dB的损耗,并具有结构简单、可靠性高、稳定性好、不改变光束特性等特点。该器件已经在惯性约束核聚变(ICF)的时间脉冲整形系统中获得应用。 A continually variable all fiber attenuator based on the principle of polarization extinction is presented. The attenuation principle of attenuator is analyzed by the method of Jones matrix, and the effect of extinction ratio of polarization-maintaining(PM) fiber polarizer on dynamic range is simulated. The experiment results demonstrate that with the attenuator consisting of two fiber polarizers with the extinction ratio of 30 dB and servo motor with angle resolution of 5 000 step/rotation, the dynamic range of 27 dB, resolution of 0. 126% and insertion loss of 0.5 dB are obtained. This attenuator is characterized by simple structure, good reliability and stability, and doesn't change characteristics of transmission light. The attenuator has been used in temporal pulse shaping system of ICF.
出处 《半导体光电》 EI CAS CSCD 北大核心 2005年第6期483-486,共4页 Semiconductor Optoelectronics
关键词 导波与光纤光学 可变光衰减器 保偏光纤偏振器 琼斯矩阵 guided wave and fiber optics variable optical attenuator polarization-maintaining fiber polarizer Jones matrix
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