Abstract

The nonlinear residual intensity modulation (RIM) in a multifunction integrated optic circuit (MIOC), mainly caused by the recoupling of the stray light of the TE mode to the output fiber, can impact the stability of a fiber-optic gyroscope (FOG). Theoretically, the polarization extinct ratio (PER) of the MIOC can be utilized to evaluate the nonlinear RIM. To suppress the nonlinear RIM, we have constructed an anti-reflection layer consisting of rough treatment and absorption coating on the bottom of the MIOC. Compared with the traditional design, the MIOC presents a lower nonlinear RIM about an order of magnitude (from 6 × 10⁻⁴ to 8 × 10⁻⁵), which has been verified by both theoretical simulation and practical experiments. As well as, the PER of the MIOC is improved with this design. The MIOC design proposed in this article has good potential in the applications of high-accuracy FOGs.

Method for improving the polarization extinction ratio of multifunction integrated optic circuits

Jiaqi Liu, Chunxi Zhang, Fuyu Gao, Jingming Song, Xiaobin Xu, and Zhiyu Guo
Opt. Express 29(18) 28096-28103 (2021)

Suppression of the quantization error in a fiber optic gyroscope using a double-electrode-pair multifunction integrated-optic circuit

Yue Zheng, Jiaqi Liu, Heyu Chen, Lijing Li, and Chunxi Zhang
Opt. Express 27(19) 27028-27038 (2019)

Residual intensity modulation-induced error in resonator fiber optic gyroscopes with triangular phase modulation

Zhiguo Jiang, Zongfu Hu, Wei Kang, Jinfang Wang, and Changsong Fu
Appl. Opt. 58(27) 7597-7602 (2019)

Effective suppression of residual coherent phase error in a dual-polarization fiber optic gyroscope

Rongya Luo, Yulin Li, Sheng Deng, Chao Peng, and Zhengbin Li
Opt. Lett. 43(4) 815-818 (2018)

Fiber-optic gyroscopes: from design to production [Invited]

Jagannath Nayak
Appl. Opt. 50(25) E152-E161 (2011)