中国激光, 2019, 46 (12): 1206003, 网络出版: 2019-12-02
基于混合型光子晶体光纤谐振腔的谐振陀螺方案 下载: 976次
Development of Resonant Fiber Optic Gyroscope Based on Hybrid Photonic Crystal Fiber Resonator
光纤光学 谐振式光纤陀螺 混合型光子晶体光纤谐振腔 零偏稳定性 单偏振光纤 fiber optics resonant fiber optic gyroscope hybrid photonic crystal fiber resonator zero-bias stability single polarization fiber
摘要
为抑制谐振陀螺的偏振波动噪声,提出了一体化谐振式光纤陀螺设计方案。基于特殊设计的光子晶体光纤和单偏振光纤研制了一种混合型光子晶体光纤谐振腔,该谐振腔同时具有较高的偏振消光比和良好的温度稳定性;为减小谐振腔损耗,优化了光子晶体光纤的模场直径,使其与单偏振光纤相一致,因此二者熔接损耗可被控制在0.1 dB以内,进而得到谐振腔精细度为13.2;基于该谐振腔搭建了双闭环谐振陀螺系统。测试结果表明:双闭环谐振陀螺系统具有较小的偏振波动误差特性,在300 s积分时间内陀螺输出白噪声占主导地位,零偏稳定性达到0.25 (°)·h -1;在测量范围为-240~240 (°)·s -1时,双闭环谐振陀螺系统的陀螺标度因数非线性度为2.3×10 -4,性能较单闭环陀螺系统有明显提升。
Abstract
In this study, an integrated resonant fiber optic gyroscope (R-FOG) scheme that employs a hybrid photonic crystal fiber (PCF) resonator is proposed to suppress the polarization-fluctuation noise of R-FOG. The hybrid PCF resonator, which exhibits a high polarization extinction ratio and good temperature stability, is primarily composed of a specially designed PCF and single polarization fiber (SPF). To reduce the resonator loss, the mode field diameter of PCF is modified to become consistent with that of SPF. Further, the fusion loss of the two types of fibers is controlled within 0.1 dB. In addition, the fineness of the hybrid PCF resonator is 13.2. A double closed-loop R-FOG system is set up based on the hybrid PCF resonator, and its performance is experimentally studied. The results denote that the R-FOG system exhibits small polarization-fluctuation error characteristics. The white noise dominates the output at an integration time of 300 s when a bias stability of 0.25 (°)·h -1 is achieved. Within the dynamic range from -240 (°)·s -1 to 240 (°)·s -1, the scale-factor nonlinearity of the double closed-loop R-FOG system is observed to be 2.3×10 -4. The performance of the double closed-loop R-FOG system is better than that of a single closed-loop R-FOG system.
索鑫鑫, 李晶, 刘元元, 吴旭东. 基于混合型光子晶体光纤谐振腔的谐振陀螺方案[J]. 中国激光, 2019, 46(12): 1206003. Xinxin Suo, Jing Li, Yuanyuan Liu, Xudong Wu. Development of Resonant Fiber Optic Gyroscope Based on Hybrid Photonic Crystal Fiber Resonator[J]. Chinese Journal of Lasers, 2019, 46(12): 1206003.