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弹箭与制导学报 >

2024 , Vol. 44 >Issue 5: 121 - 126

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2024.05.015

低折射率温度系数保偏光纤的变温性能验证

  • 崔志超 1 ,
  • 李亚凡 1, 2 ,
  • 魏飞 2 ,
  • 孔军 2 ,
  • 寇亮亮 2 ,
  • 罗瑞 2 ,
  • 马海全 2
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  • 1 中国航空工业集团公司西安飞行自动控制研究所,陕西 西安 710075
  • 2 中航捷锐(西安)光电技术有限公司,陕西 西安 710086
李亚凡(1997—),男,助理工程师,硕士,研究方向:光纤传感。

崔志超(1985—),男,高级工程师,博士研究生,研究方向:光纤环技术。

收稿日期: 2024-08-25

  网络出版日期: 2024-12-18

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Verification of Variable Temperature Performance of Polarization-maintaining Fiber with Low Refractive Index Temperature Coefficient

  • CUI Zhichao 1 ,
  • LI Yafan 1, 2 ,
  • WEI Fei 2 ,
  • KONG Jun 2 ,
  • KOU Liangliang 2 ,
  • LUO Rui 2 ,
  • MA Haiquan 2
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  • 1 AVIC Xi’an Flight Automatic Control Research Institute,Xi’an 710075,Shaanxi, China
  • 2 AVIC Jierui (Xi’an) Photoelectric Technology Co., Ltd.,Xi’an 710086,Shaanxi, China

Received date: 2024-08-25

  Online published: 2024-12-18

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摘要

全温度环境下的工作精度水平是当前制约光纤陀螺在更多领域应用的主要瓶颈,主要体现在变温零偏稳定性指标,前人围绕着热设计、工艺实现和算法补偿等方法开展研究,大幅改善了光纤陀螺的变温性能。光纤环是光纤陀螺的敏感器件,保偏光纤是构成光纤环的主要材料,其性能与光纤环变温性能密切相关,而对保偏光纤与变温精度的相关机理分析和实验研究较少。因此,基于光纤环在变温环境下热致Shupe零位误差产生机理的分析,发现保偏光纤折射率温度系数是主要影响因素。通过有限元仿真分析并结合保偏光纤布拉格光栅(PMF FBG)测试折射率温度系数的试验方案,发现猫型保偏光纤(CAT PMF)相较于传统熊猫型保偏光纤(PANDA PMF)具有更低的折射率温度系数。最后,通过将两型保偏光纤绕制成光纤环进行测试,结果表明,相对于熊猫型保偏光纤,猫型保偏光纤绕制成光纤环的变温零偏极差压缩21.1%,变温零偏稳定性提升22.9%,进一步证实猫型保偏光纤具有提升光纤环变温性能的应用前景。

关键词： 光纤环; 光纤布拉格光栅; 折射率; 变温零偏稳定性

本文引用格式

崔志超 , 李亚凡 , 魏飞 , 孔军 , 寇亮亮 , 罗瑞 , 马海全 . 低折射率温度系数保偏光纤的变温性能验证[J]. 弹箭与制导学报, 2024 , 44(5) : 121 -126 . DOI: 10.15892/j.cnki.djzdxb.2024.05.015

Abstract

The working accuracy level at wide temperature range is the main bottleneck restricting the application of fiber optic gyroscope in more fields, which is mainly reflected in the zero bias stability index with variable temperature. Previous researches on thermal design, processing technic and algorithm compensation have greatly improved the temperature variable performance of fiber optic gyroscope. Fiber coil is a sensitive device of fiber optic gyroscope, and polarization-maintaining fiber is the main material of the fiber coil, whose performance is closely related to the temperature variable performance of the fiber coil, but relevant mechanism analysis and experimental research on the polarization-maintaining fiber and temperature variable accuracy are few. Therefore, based on the analysis of the mechanism of Shupe error caused by fiber ring at the variable temperature environment, it is found that the temperature coefficient of refractive index of the polarization-maintaining fiber is the main influencing factor. Through finite element simulation and combining with testing the refractive index temperature coefficient of PMF FBG, it is found that CAT PMF has lower refractive index temperature coefficient than traditional PANDA PMF. Finally, by winding two types of polarizing fiber to make fiber coil for testing, the results show that compared with PANDA PMF, the variable temperature zero bias range of fiber coil wound by CAT PMF converges by 21.1%, and the variable temperature zero bias stability improves by 22.9%, which further confirms the application prospect of CAT PMF to improve the variable temperature performance of fiber coil.

Key words： fiber coil; FBG; refractive index; variable temperature zero bias stability

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