光子晶体光纤陀螺标度因数特性研究

Scale factor of photonic crystal fiber-optic gyroscope

光子晶体光纤陀螺原理上具有磁敏感性低、温度稳定性好及抗辐照等特点,是光纤陀螺一个新的重要发展方向。很多学者研究了其零偏特性,但未见对其标度因数的研究报道。研究了光子晶体光纤陀螺标度因数的误差构成,并试验测量了光子晶体光纤环引入的误差。研究结果表明,光子晶体光纤陀螺标度因数具有更稳定的温度和辐照特性,在-40^+70℃的温度范围内,标度因数重复性为242.3×10-6(未补偿时),约为普通光纤陀螺的1/2。在经历总剂量为50 krad(Si)的辐照后,光纤陀螺标度因数变化109×10-6,重复性和非线性没有明显变化,比普通光纤陀螺稳定1倍以上。

Photonic crystal fiber-optic gyroscope（PCFOG） has become an important developing direction of FOG due to its low magnetic sensitivity,good temperature stability,and anti-radiation capability in principle.Researchers have studied a lot on the bias characteristics of PCFOG,however,no work has been done on its scale factor performance.In this paper,the factors that lead to scale factor error of PCFOG were analyzed and the error induced by photonic crystal fiber coil was experimentally tested.The results show that PCFOG has better temperature and radiation stabilities than ordinary FOG.Within a temperature range of-40 -＋70 ℃,the scale factor repeatability of the PCFOG is 242.3 ×10^-6without compensation which is almost half of the conventional FOG;After a total dose of 50 krad（Si） radiation,the scale factor shifts 109 ×10^-6and no notable changes are observed with the repeatability and nonlinearity.Therefore,the PCFOG shows one time better stability than conventional FOG.