Chinese Optics Letters, 2011, 9 (2): 020604, Published Online: Mar. 3, 2011
Polarization-maintaining fiber loop with double optical length and its application to fiber optic gyroscope Download: 658次
保偏光纤 光纤环 光纤陀螺 光程 060.2340 Fiber optics components 060.2800 Gyroscopes 230.5440 Polarization-selective devices 350.4600 Optical engineering
Abstract
A novel polarization maintaining fiber (PMF) loop is proposed and used for an interferometric fiber optic gyroscope (FOG). By splicing a conventional PMF loop with two pigtailed polarization beam splitters, polarized light can be guided to propagate along the slow and fast axes of the PMF in sequence to double its effective optical length in the loop. In particular, the resultant optical length in the combined loop is partially self-compensated for some external disturbances, such as transverse strain. Primary experiments on the FOG using the proposed loop demonstrate that the average static bias deviation between –40 and +60 oC is less than 0.050 deg./h, and the average bias variation under conventional random vibration test is less than 0.10 deg./h.
Changsheng Li, Chunxi Zhang, Ningfang Song, Hongjie Xu. Polarization-maintaining fiber loop with double optical length and its application to fiber optic gyroscope[J]. Chinese Optics Letters, 2011, 9(2): 020604.