Abstract
The feedback loop in dual Mach–Zehnder interferometer (DMZI) sensors stabilizes the system operating at the quadratic point for the highest sensitivity but requires the minimum measurable vibration frequency out of the feedback bandwidth, resulting in a limited dynamic range. In this paper, we point out that the feedback operation is unnecessary while vibration is occurring and propose a strategy to adaptively enable/disable the feedback phase compensation depending on the vibration state, lowering the minimum measurable vibration frequency tenfold. Moreover, the state variable employed enables direct extraction of vibration-related data, with no need of complicated postprocessing algorithms.
© 2022 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Muping Song, Ge Chen, Enxue Cui, and Zhang Yuxin
Appl. Opt. 61(19) 5675-5680 (2022)
B. G. Gorshkov, A. E. Alekseev, M. A. Taranov, D. E. Simikin, V. T. Potapov, and D. A. Ilinskiy
Appl. Opt. 61(28) 8308-8316 (2022)
Hao Yan, Liuyang Chen, Zhilin Xu, Xiang Lin, and Yurong Liang
Appl. Opt. 61(32) 9569-9575 (2022)