布里渊光纤陀螺环形腔中偏振串扰及消除方法  

Brillouin optical fiber gyroscope polarization crosstalk and its elimination method

作　　者：何周[1] 李绪友[1] 魏义涛[1] 

机构地区：[1]哈尔滨工程大学自动化学院,黑龙江哈尔滨150001

出　　处：《华中科技大学学报（自然科学版）》2012年第3期22-25,30,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：中俄科技合作专项基金资助项目(2010DFR80140)

摘　　要：建立了布里渊光纤陀螺环形腔中泵浦光及布里渊激光的偏振传输模型,推导出了2本征态的本征值,分析了环境因素波动引起的偏振误差.研究结果表明:采用保偏光纤构建光纤环形腔并旋转熔接点偏振主轴90°能使泵浦光及布里渊激光2本征偏振态在激光器中保持稳定的谐振间距,从而消除偏振串扰给陀螺带来的误差;采用单偏振单模光纤构建布里渊光纤陀螺环形腔能消除偏振串扰.针对2种消除偏振串扰的方法进行了实验,实验结果与理论分析相符.The polarization transfer model of pump light and brillouin laser light in ring resonator were established,and the intrinsic value of the two eigenstates were derived,then the polarization crosstalk errors with environmental fluctuations was theoretically analyzed.It was obtained that by using polarization maintain fiber to build fiber ring resonator with 90° polarization axis rotation can make the spacing of resonance of pump light and Brillouin laser light stability,and then the polarization crosstalk error for gyroscope was eliminated.By using a single-polarization single-mode optical fiber to build fiber ring resonator to eliminate the polarization crosstalk was derived and analyzed.The two methods for eliminating polarization crosstalk were tested by experimental,and the experimental results were in accord with the theoretical analysis.

关 键 词：光纤陀螺 布里渊散射 偏振本征态 频率稳定性 光纤环形腔 

分 类 号：TN967.2[电子电信—信号与信息处理]