Highly sensitive hydrostatic-pressure measurement with a fiber grating laser embedded in a composite structure

Zhan Quan; Long Jin; Yong-Liang Chang; Bai-Ou Guan

doi:10.1117/12.966850

17 October 2012 Highly sensitive hydrostatic-pressure measurement with a fiber grating laser embedded in a composite structure

Zhan Quan, Long Jin, Yong-Liang Chang, Bai-Ou Guan

Author Affiliations +

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 84212Q (2012) https://doi.org/10.1117/12.966850
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

We present a high-sensitivity hydrostatic pressure sensor based on a dual-polarization fiber grating laser. To enhance the sensitivity, the laser is embedded in a composite structure to effectively convert the pressure into intra-cavity birefringence. The measurement is carried out by monitoring the beat frequency between the two orthogonal polarization laser modes. The pressure sensitivity reaches 0.17 GHz/MPa within the range 0 to 10 MPa, about one hundred times higher than the bare laser, and the minimal detectable pressure change is as small as 10 kPa.

Citation Download Citation

Zhan Quan, Long Jin, Yong-Liang Chang, and Bai-Ou Guan "Highly sensitive hydrostatic-pressure measurement with a fiber grating laser embedded in a composite structure", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84212Q (17 October 2012); https://doi.org/10.1117/12.966850

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