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空芯光子晶体光纤是一种新型的陀螺用光纤,较传统光纤具有良好的抗磁性,光纤的磁敏感性是由光纤的Verdet常数来表征的。为研究空芯光子晶体光纤的磁敏感性,利用Comsol软件对HC-1550-2空芯光子晶体光纤的Verdet常数进行仿真计算,选用含有法拉第旋转反射镜(FRM)的反射式双光路测量方案对空芯光子晶体光纤的Verdet常数进行实验测量。双光路测量系统中的FRM可以消除被测光纤中线性双折射对测量的影响。仿真与测量结果相吻合,且由结果可知空芯光子晶体光纤的Verdet常数约为传统光纤的1/100倍,验证了空芯光子晶体光纤在陀螺降低磁敏感性方面的优势。
Hollow photonic crystal fiber is a new type of optical fiber for gyroscope, which has better diamagnetic resistance than traditional optical fiber. The magnetic susceptibility of optical fiber is characterized by Verdet constant of optical fiber. In order to study the magnetic susceptibility of hollow-core photonic crystal fiber, the Verdet constant of HC-1550-2 hollow-core photonic crystal fiber is calculated by Comsol software. The reflection double-path measurement scheme with Faraday rotation mirror (FRM) Verdet constant of hollow-core photonic crystal fiber is measured experimentally. The FRM in a dual optical measurement system eliminates the effects of linear birefringence in the fiber under test on the measurement. Simulation and measurement results are consistent, and the results show that the Verdet constant of hollow core photonic crystal fiber is about 1/100 times that of conventional optical fiber, which verifies the advantages of hollow core photonic crystal fiber in reducing gyromagnetic sensitivity.