偏光干涉对光纤陀螺性能的影响  

Effect of Polarization Interference on Fiber Optic Gyro Performance

作　　者：米剑[1] 张春熹[2] 李铮[1] 邬占军[2] 

机构地区：[1]北京航空航天大学电子工程学院,北京100083 [2]北京航空航天大学仪器科学与光电工程学院,北京100083

出　　处：《光学学报》2006年第8期1140-1144,共5页Acta Optica Sinica

摘　　要：从光纤陀螺光学系统缺陷角度,研究了由于光纤陀螺保偏光纤融接误差及光学器件的不完善引起的偏光干涉效应,理论分析并实验研究了偏光干涉效应对传输光谱的影响及其对光纤陀螺性能的影响。研究表明,在当前的技术条件下,偏光干涉效应对光纤陀螺的标度因数影响可以忽略,偏光干涉不影响一般意义下的光源相干长度,但是却导致光源相干特性的变化,反应在相干图上出现了多个干涉衬比度峰值,这会降低宽谱光源的短相干长度特性给光纤陀螺带来的好处,由此也说明不能仅由相干长度这一个参量描述光源的相干特性。From the point of view of optic system limitation of fiber optic gyro, the phenomena of polarization interference which suffered from the fusion error of polarization maintaining fiber and unperfect optical element is studied. Also the effect of polarization interference on transmission spectra of light source and consequently on performance of the fiber optic gyro is discussed theoretically and experimentally. Under present technical condition, it is showed that the polarization interference does not affect the scale factor of fiber optic gyro. Although the polarization interference does not change the general coherent length of light source, it affects the interference characteristic of light source that there appear more than one fringes on the interference pattern. The additional interference fringes will shorten the short coherent length of wide band light source and benefit the fiber optic gyro. So it is improper not to describe the coherent characteristic of light source just by its coherent length.

关 键 词：导波光学 光纤陀螺 偏光干涉 光谱 保偏光纤 

分 类 号：TN25[电子电信—物理电子学]