摘要
为了获得干涉式光纤陀螺用光纤环的分布式偏振耦合特性,采用光相干域偏振检测(OCDP)技术进行了测量。实验结果表明,利用OCDP技术可以获得光纤环偏振耦合点的空间分布和耦合强度。通过对实验结果的分析,观测到了由光纤环缺陷点引起的大偏振耦合点。根据正反向测量中由绕环中点处应力致偏振耦合点对应的扫描长度,计算得到了光纤环关于绕环中点的对称性。测试了光纤环分布式偏振耦合的温度依赖性,结果表明不同温度下光纤环偏振耦合的差异与绕环胶的固化方法有关。通过对不同温度下有骨架光纤环和无骨架光纤环的分布式偏振耦合特性分析表明:在任何温度下,无骨架光纤环都获得了沿光纤长度分布更加均匀的偏振耦合。
In order to test the distributed polarization coupling of fiber coil in interferometric fiber optic gyroscope （IFOG）, optical coherence domain polarization （OCDP） measurement technology was used. The location and intensity of distributed polarization coupling was achieved through analyzing the test results. Moreover, large coupling point induced by defects was observed, and the symmetry of fiber coil by the midpoint can be computed according to the large polarization coupling point in fiber at midpoint induced by the stress. Temperature dependence of distributed polarization coupling in fiber coils was tested, and it is shown that the difference of polarization coupling at different temperature is related to the adhesives’curable method used. Comparison of fiber coils with hub and without hub show that the polarization coupling is much more homogeneous at all temperatures for no hub fiber coil.
出处
《红外与激光工程》
EI
CSCD
北大核心
2013年第S02期462-465,共4页
Infrared and Laser Engineering
基金
国家重大科学仪器设备开发专项(2013YQ04081506)
