Research on fiber laser sensor based on multimode interference effect with no-core fiber

Yuzhai Pan; Yilei Yao; Xue Yuan; Le Zhao; Lixin Yang

doi:10.1117/12.2292156

10 January 2018 Research on fiber laser sensor based on multimode interference effect with no-core fiber

Yuzhai Pan, Yilei Yao, Xue Yuan, Le Zhao, Lixin Yang

Proceedings Volume 10618, 2017 International Conference on Optical Instruments and Technology: Advanced Optical Sensors and Applications; 106180R (2018) https://doi.org/10.1117/12.2292156
Event: International Conference on Optical Instruments and Technology 2017, 2017, Beijing, China

Abstract

Fiber laser sensor based on multimode interference (MMI) effect can achieve high sensitivity with lower temperaturestrain cross sensitivity by designing optimally the MMI structure. An erbium-doped fiber laser for temperature, stress and refractive sensing based on single mode fiber spliced a short section of no-core fiber was proposed in this paper. The optical field characteristics of this MMI structure have been analyzed, indicating the spectral filtering effect existed. An erbium-doped fiber laser with the MMI structure inserted as the sensor element, the enhanced sensing sensitivity is achieved on the sensing experiments of ambient temperature, mechanical stress and liquid refractive index. The sensitivity of this MMI-based fiber laser sensor is up to 13.24 pm/°C with the measured range from 30 °C to 220 °C, 1.29pm/με from 0 to 7776.05με, 180.21nm/RIU from 1.34 to 1.42, respectively.

Citation Download Citation

Yuzhai Pan, Yilei Yao, Xue Yuan, Le Zhao, and Lixin Yang "Research on fiber laser sensor based on multimode interference effect with no-core fiber", Proc. SPIE 10618, 2017 International Conference on Optical Instruments and Technology: Advanced Optical Sensors and Applications, 106180R (10 January 2018); https://doi.org/10.1117/12.2292156

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KEYWORDS

Structured optical fibers

Fiber lasers

Sensors

Multimode fibers

Fiber optics sensors

Refractive index

Optical fibers

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