Multipoint Temperature Sensing Using Linear-Cavity Fiber Laser with an EDFA and FBGs

Optical fiber sensors have been investigated to measure distributed distortion of large buildings, bridges and expressways. We are focusing on a fiber lasing system including sensing elements in the cavity since it has advantages such as higher resolution for wavelength shift and higher signal-to-no...

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Published in2021 IEEE International Conference on Sensors and Nanotechnology (SENNANO) pp. 5 - 8
Main Authors Hatanaka, Kengo, Kishikawa, Hiroki, Goto, Nobuo, Fujikata, Junichi, Yu, Yi-Lin, Liaw, Shien-Kuei, Sung, Jiun-Yu
Format Conference Proceeding
LanguageEnglish
Published IEEE 22.09.2021
Subjects
EDFA
FBG
Lasers
multi-point
Optical fiber amplifiers
optical fiber sensor
Optical fiber sensors
Power control
Sensitivity
temperature
Temperature measurement
Temperature sensors
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DOI10.1109/SENNANO51750.2021.9642539

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Summary:Optical fiber sensors have been investigated to measure distributed distortion of large buildings, bridges and expressways. We are focusing on a fiber lasing system including sensing elements in the cavity since it has advantages such as higher resolution for wavelength shift and higher signal-to-noise ratio. A multipoint temperature sensor using linear-cavity lasing system consisting of an Erbium-doped fiber amplifier (EDFA), variable optical attenuators, and fiber Bragg grating elements is demonstrated. In order to obtain high-power and multi wavelength operation, an EDFA with appropriate power control is employed. As a result of two-point temperature measurement experiment, two-wavelength lasing and temperature-dependent wavelength change are observed. The sensitivity of 10.5 pm/deg is achieved.
DOI:10.1109/SENNANO51750.2021.9642539