Measurement of the Verdet Constant of Polarization-Maintaining Air-Core Photonic Bandgap Fiber

作者：Song, Ningfang; Wang, Xiaoyang; Xu, Xiaobin^*; Cai, Wei; Wu, Chunxiao

来源：Sensors (Switzerland), 2017, 17(8): 1899.

DOI：10.3390/s17081899

• Faraday effect
• gyroscopes
• microstructured fibers

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 similar to 3.3 mrad/T/m for the broadband light with a spectral width of similar to 38 nm and a mean wavelength of similar to 1550 nm, which is similar to 124 times less than that of a conventional stress-induced birefringent fibers called PANDA fibers (similar to 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 similar to 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.

• 出版日期2017-8
• 单位北京航空航天大学