Novel gas sensor combined fiber cavity ring-down and frequency-shifted interferometry

Tao Tian; Ciming Zhou; Dian Fan; Yiwen Ou; Hui Tian; Mengmeng Li

doi:10.1117/12.2194431

28 September 2015 Novel gas sensor combined fiber cavity ring-down and frequency-shifted interferometry

Tao Tian, Ciming Zhou, Dian Fan, Yiwen Ou, Hui Tian, Mengmeng Li

Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 963469 (2015) https://doi.org/10.1117/12.2194431
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil

Abstract

A novel gas senor combined fiber cavity ring-down (CRD) with frequency-shifted interferometry (FSI) is proposed and demonstrated. Compared to the conventional fiber CRD techniques, the CRD decay transient was originated from continuous-wave light as a function of the distance transmitted in the cavity, therefore this method needs neither pulsed light nor fast detection. As a proof-of-concept experiment, we employed a micro-optical gas cell as the sensing element and measured different concentrations of acetylene samples. The experimental results show that the FSI-CRD system has a resolution of 0.15798%/dB, and it provides a simple and cost-effective scheme for gas sensing.

Citation Download Citation

Tao Tian, Ciming Zhou, Dian Fan, Yiwen Ou, Hui Tian, and Mengmeng Li "Novel gas sensor combined fiber cavity ring-down and frequency-shifted interferometry", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 963469 (28 September 2015); https://doi.org/10.1117/12.2194431

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