Compensation of thermal strain induced polarization nonreciprocity in dual-polarization fiber optic gyroscope
Compensation of thermal strain induced polarization nonreciprocity in dual-polarization fiber optic gyroscope
复制标题
双偏振光纤陀螺中热应变引起偏振非互易性的补偿
DOI：
10.1364/oe.25.026747
复制
发表时间：
2017-10-30
期刊：
影响因子：
3.8
通讯作者：
Li, Zhengbin
中科院分区：
文献类型：
--
作者：
Luo, Rongya;Li, Yulin;Li, Zhengbin
双偏振干涉型光纤陀螺(IFOG)是一种可以对两个正交偏振的偏振非互易(PN)位相误差进行光学补偿的新型方案。在这项工作中，我们研究了变温条件下伪随机相位误差补偿的有效性。结果表明，热致应变使光纤发生形变，引起双折射和偏振交叉耦合的扰动，降低了光纤陀螺的稳定性。利用耦合波方程和琼斯矩阵，推导了伪码相位误差的传播模型和解析表达式。理论和实验证明，尽管单模(SM)和保偏(PM)光纤线圈由于其固有的波传播特性而表现不同，但在缓慢和绝热的温度变化下，热应变引起的PN相位误差仍然可以得到补偿。这可能是克服IFOG温度脆弱性的一个很有前途的功能。(C)2017年美国光学学会
Dual-polarization interferometric fiber optic gyroscope (IFOG) is a novel scheme in which the polarization nonreciprocal (PN) phase error of the two orthogonal polarizations can be optically compensated. In this work, we investigate the effective of PN phase error compensation under varying temperature. It is proved that, the thermally induced strain deforms the fiber, and results in perturbations on the birefringence and polarization cross coupling which degrades the IFOG's stability. A wave propagation model and analytical expressions of PN phase error are derived by using coupled-wave equation and Jones matrix. We theoretically and experimentally verify that, although the single-mode (SM) and polarization-maintaining (PM) fiber coils behave different owing to their intrinsic properties of wave propagation, the thermal strain induced PN phase error can still be compensated under slow and adiabatic temperature variations. This could be a promising feature to overcome the temperature fragility of IFOG. (C) 2017 Optical Society of America