Curvature Sensing Setup Based on a Fiber Laser and a Long-Period Fiber Grating

In this letter, a curvature sensing setup based on a fiber ring laser containing a long-period fiber grating (LPFG) is presented. The LPFG operates as a wavelength selective filter and as a curvature sensing head. The LPFG consists of a periodically tapered fiber section written by a CO 2 -laser gla...

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Bibliographic Details
Published in:IEEE photonics technology letters 2019-08, Vol.31 (15), p.1265-1268
Main Authors: Martin-Vela, Javier A., Sierra-Hernandez, Juan M., Martinez-Rios, Alejandro, Estudillo-Ayala, Julian M., Gallegos-Arellano, Eloisa, Toral-Acosta, Daniel, Porraz-Culebro, Teresa E., Jauregui-Vazquez, Daniel
Format: Article
Language:English
Subjects:
Cavity resonators
Curvature
Detection
Emission
Erbium-doped fiber lasers
Fiber lasers
fiber optic lasers
Fiber optic sensors
Laser modes
Laser theory
Lasers
long-period fiber grating
Power lasers
Ring lasers
Sensors
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Summary:In this letter, a curvature sensing setup based on a fiber ring laser containing a long-period fiber grating (LPFG) is presented. The LPFG operates as a wavelength selective filter and as a curvature sensing head. The LPFG consists of a periodically tapered fiber section written by a CO 2 -laser glass processing system. The experimental results show that by increasing the curvature values from 0 to 0.266 \text{m}^{-1} , the laser wavelength emission shifts linearly from 1572 to 1560 nm, and a curvature sensitivity of −42.488 nm/ \text{m}^{-1} is achieved. In addition, the laser emission has a linewidth of 0.05 nm, a slope laser efficiency of 0.43%, and a high single-mode suppression ratio (SMSR) of 60 dB. Finally, this fiber laser offers output power stability at room temperature, compactness, and robustness.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2019.2924847