Transmitting spectra-temperature characteristic of single-mode fibercoupler for fiber gyro application

摘要

The relationship between the transmitting spectra characteristic of a fused single mode fiber coupler(SMFC) and the performance of interferometric fiber-optic gyroscope (IFOG) is analyzed in theory firstly.Then the transmitting spectra-temperature characteristic of SMFC is experimented, and the influence ofthe spectrum-stability of the SMFC on IFOG is simulated and experimented. Through the theory analysisand experiment research, it is confirmed that the spectrum output from the SMFC's throughput port ismore stable than that output from the coupled port, and the bias instability of the rotation errors inducedby the variation of spectrum output from the SMFC's coupled port is 10 times of that output from thethroughput port. Therefore, to choose the SMFC's throughput port as the input port for navigation-gradegyroscope is an effective method to improve the IFOG's performance.