Reduced phase error of a fiber optic gyroscope using a polarization maintaining photonic crystal fiber |
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Authors: | Ningfang Song Pan Ma Jing Jin Jingming Song |
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Affiliation: | School of Instrument Science and Opto-electronics Engineering, Beihang University, XueYuan Road No. 37, HaiDian District, Beijing, PR China |
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Abstract: | We report the first measurement of the polarization crosscoupling of a 900-m length of quadrupolar-wound sensing coil for the fiber optic gyroscope (FOG) using polarization maintaining photonic crystal fibers (PM-PCFs). The crosscoupling is analyzed with the Optical Coherence Domain Polarimeter (OCDP). Also the polarization extinction ratio (PER) of the PM-PCF coil is measured. For comparison, a standard panda fiber coil with nearly the same length is examined. The results show that PER of the PM-PCF coil is ~10 dB larger than the panda fiber coil, and polarization crosscoupling in the PM-PCF coil is ~10 dB less than in the panda fiber coil. Moreover, based on measurements, a 4-fold reduction in phase error is demonstrated numerically in a FOG made of the PM-PCF coil, compared to the same gyro operated with a similar coil of panda fiber. These findings have important benefits in a higher measurement precision and stability of FOG. |
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