Brillouin strain and temperature sensing based on elliptical-core chalcogenide fiber

CAO Tingting; AN Guowen

doi:10.5768/JAO202546.0208002

Journal of Applied Optics > 2025 > 46(2): 465-472. > DOI: 10.5768/JAO202546.0208002

CAO Tingting, AN Guowen. Brillouin strain and temperature sensing based on elliptical-core chalcogenide fiber[J]. Journal of Applied Optics, 2025, 46（2）: 465-472. DOI: 10.5768/JAO202546.0208002

Citation:

CAO Tingting, AN Guowen. Brillouin strain and temperature sensing based on elliptical-core chalcogenide fiber[J]. Journal of Applied Optics, 2025, 46（2）: 465-472. DOI: 10.5768/JAO202546.0208002

Citation:

CAO Tingting, AN Guowen. Brillouin strain and temperature sensing based on elliptical-core chalcogenide fiber[J]. Journal of Applied Optics, 2025, 46（2）: 465-472. DOI: 10.5768/JAO202546.0208002

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Brillouin strain and temperature sensing based on elliptical-core chalcogenide fiber

CAO Tingting,
AN Guowen^,

State Key Laboratory of Widegap Semiconductor Optoelectronic Materials and Technologies, North University of China, Taiyuan 030051, China

More Information

Received Date: March 18, 2024
Revised Date: January 09, 2025
Available Online: March 14, 2025

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Abstract

Abstract

Highly nonlinear chalcogenide fibers are widely used in the applications of Brillouin fiber sensing and fiber lasing. A stimulated Brillouin scattering (SBS) dual-parameter sensing method based on a highly birefringent chalcogenide polymer composite fiber (As₂Se₃-PMMA) was introduced, a highly nonlinear elliptical-core As₂Se₃-PMMA tapered fiber was designed and fabricated, and the SBS characteristics of the fiber were measured using a Brillouin optical time-domain analysis (BOTDA) system. Due to different Brillouin frequency shifts of temperature and strain in the fast and slow axes of the elliptical-core As₂Se₃-PMMA tapered fiber, the dual-parameter measurement of temperature and strain of the sensor was achieved. The temperature sensitivities in the fast and slow axes of the elliptical-core chalcogenide tapered fiber are −2.772 MHz/°C and −2.605 MHz/°C, respectively, and strain sensitivities are −21.9 kHz/με and −16.3 kHz/με, respectively. By establishing a matrix based on the different temperatures and strain responses of the fast and slow axes, the temperature and strain resolution of the chalcogenide optical fiber sensor are 0.9 °C and 28 με, respectively.
- chalcogenide tapered fiber,
- stimulated Brillouin scattering,
- fiber sensing,
- dual-parameter sensing

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References (22)

References

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Brillouin strain and temperature sensing based on elliptical-core chalcogenide fiber