We propose a method based on the white-light interference technique for measuring the Verdet constant of a polarization-maintaining air-core photonic bandgap fiber (PM-PBF). The experimental results show that the Verdet constant of the PM-PBF is ~3.3 mrad/T/m for the broadband light with a spectral width of ~38 nm and a mean wavelength of ~1550 nm, which is ~124 times less than that of a conventional stress-induced birefringent fibers called PANDA fibers (~0.41 rad/T/m for the same broad-spectrum light). The results indicate that the nonreciprocal error induced by the Faraday effect in a fiber optic gyroscope (FOG) made of the PM-PBF is theoretically ~25 times less than that of a conventional FOG made of the PANDA fiber when other conditions, such as the fiber twist, fiber coil area, and so on, are the same.
展开▼
机译：我们提出了一种基于白光干涉技术的方法，用于测量保偏空芯光子带隙光纤（PM-PBF）的维尔德常数。实验结果表明，对于宽带光，PM-PBF的Verdet常数为〜3.3 mrad / T / m，光谱宽度为〜38 nm，平均波长为〜1550 nm，比其小约124倍。应力的双折射光纤称为PANDA光纤（对于相同的广谱光约为0.41 rad / T / m）。结果表明，在其他条件下，例如PM-PBF制成的光纤陀螺仪（FOG）中，由法拉第效应引起的不可逆误差理论上要比PANDA光纤制成的传统FOG小约25倍。纤维捻度，纤维线圈面积等相同。
展开▼
