Multiplexed sub-nano resolution quasi-static strain sensor based on transient response of Fabry-Perot interferometers

Jiageng Chen; Qingwen Liu; Zuyuan He

doi:10.1117/12.2267101

23 April 2017 Multiplexed sub-nano resolution quasi-static strain sensor based on transient response of Fabry-Perot interferometers

Jiageng Chen, Qingwen Liu, Zuyuan He

Author Affiliations +

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 1032353 (2017) https://doi.org/10.1117/12.2267101
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

We present a multiplexed quasi-static strain sensor with sub-nano resolution using fiber Fabry-Perot interferometers (FFPIs). The FFPIs are connected in ladder structure with cascaded couplers and delay fibers for multiplexing, and their transient response excited by laser pulses are acquired to distinguish the resonant frequencies of each FFPI. An electro-optical system based on acousto-optic modulator is employed to interrogate the sensor array. In the demonstrational experiment, 3-channel strain measurement with resolutions better than 0.2 nε/Hz^1/2 in frequency band from 0.1 Hz to 100 Hz is realized.

Citation Download Citation

Jiageng Chen, Qingwen Liu, and Zuyuan He "Multiplexed sub-nano resolution quasi-static strain sensor based on transient response of Fabry-Perot interferometers", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 1032353 (23 April 2017); https://doi.org/10.1117/12.2267101

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