Abstract

We present a novel, to the best of our knowledge, white light interferometric fiber-optic gyroscope (IFOG) scheme using a fiber-optic rhombic optical path difference (OPD) bias structure to interrogate with a sensing coil to realize rotation rate measurement without a phase modulator. The OPD bias structure composed of four (${2} \times 1$) 3 dB single-mode fiber couplers was constructed to implement non-reciprocal OPD bias. White light interferometric demodulation was utilized to acquire the change in OPD due to the Sagnac-phase shift. Absolute linear output can be obtained. We produced the principle prototype of rhombic OPD bias white light IFOG without utilizing a phase modulator. An experimental demonstration of the IFOG prototype system achieves linear output with respect to the OPD difference in detecting rotation rate.

© 2021 Optical Society of America

Fiber-optic gyroscope for the suppression of a Faraday-effect-induced bias error

Aylin Yertutanol, Önder Akçaalan, Serdar Öğüt, Ekmel Özbay, and Abdullah Ceylan
Opt. Lett. 46(17) 4328-4331 (2021)

Quadrature demodulation with synchronous difference for interferometric fiber-optic gyroscopes

Zinan Wang, Yi Yang, Yongxiao Li, Xiaoqi Yu, Zhenrong Zhang, and Zhengbin Li
Opt. Express 20(23) 25421-25431 (2012)

Navigation-grade three-axis resonant fiber-optic gyroscope employing a multiplexed source

Shuang Liu, Junyi Hu, Yuxin Wang, Qingwen Liu, Huilian Ma, and Zuyuan He
Opt. Lett. 48(10) 2639-2642 (2023)

Open-loop fiber-optic gyroscope with a double sensitivity employing a polarization splitter and Faraday rotator mirror

Weiran Wu, Kejiang Zhou, Chengjie Lu, and Tuohua Xian
Opt. Lett. 43(23) 5861-5864 (2018)

Method for suppressing the bias drift of interferometric all-fiber optic gyroscopes

Xinyue Wang, Changhong He, and Ziyu Wang
Opt. Lett. 36(7) 1191-1193 (2011)