保偏光纤和偏振器对传输光光谱的影响  

Influence of Polarization Maintaining Fibers and Polarizer on the Lightwave Spectrum

作　　者：张春熹[1] 李彦[1] 徐宏杰[1] 冯丽爽[1] 梁生[1] 

机构地区：[1]北京航空航天大学仪器科学与光电工程学院,北京100083

出　　处：《光谱学与光谱分析》2008年第7期1689-1694,共6页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(60207002)资助

摘　　要：保偏光纤和偏振器的参数以及它们之间的连接角度对传输光的光谱特性有重要的影响。利用琼斯矩阵建立了光波的传输模型,首次讨论了光波偏振度、光纤长度、光纤之间以及光纤与器件之间的对轴角度等对输出光谱的影响。研究表明,当光纤之间或光纤与器件之间的对轴角度不为零时,完全非偏振光的输出光谱形状不会发生改变,而偏振或部分偏振光波的输出光谱中叠加了周期函数。对轴角度一定时,光纤越长,周期函数的周期越小;光纤长度一定时,在一定的范围内,对轴角度越大,周期函数的幅值越大。通过实验对结论进行了验证。结论对采用保偏光纤和偏振器的系统具有理论指导意义。The parameters of polarization maintaining fibers and polarizer, and the splicing angles between them have important influence on the spectral characteristics of lightwave propagating in them. The transmission model of lightwave was established using Jones matrix. For the first time, the effect of degree of polarization, fiber lengths, splicing angles between fibers and between fiber and component on the output spectrum was discussed. It was indicated that the shape of output spectrum of the unpolarized lightwave will not change when the splicing angles between fibers and between fiber and component were not zero, while there were periodical functions added to the output spectrum of polarized of partially polarized lightwave. The result that when the angles were constants, the longer the fibers were, the smaller the periods of periodical functions, and that when the fiber lengths were constants, in a certain range the bigger the angles, the larger the amplitudes of periodical functions, was achieved. The conclusions were verified by experiments and they could supply theoretical guidance for the systems using polarization maintaining fibers and polarizer.

关 键 词：保偏光纤 偏振器 光谱 琼斯矩阵 

分 类 号：O436[机械工程—光学工程]