Smart architecture for stable multipoint fiber Bragg grating sensor system

Yeh, Chien Hung; Tsai, Ning; Zhuang, Yuan; Huang, Tzu Jung; Chow, Chi‐Wai; Chen, Jing Heng; Liu, Wen Fung

doi:10.1088/1555-6611/aa92f8

Cited by 2 publications

(1 citation statement)

References 16 publications

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“…However, the wavelength interval of two adjacent FBGs would limit both the number of FBGs and the dynamic range allowed in the strain sensing system [1,15,16]. In order to monitor each FBG sensor, broadband light sources and optical tunable lasers have been used [17][18][19]. Generally, wavelength-tunable erbium-doped fiber (EDF) lasers are cost-effective sources to generate different output wavelengths for optical sensing [20].…”

Section: Introductionmentioning

confidence: 99%

Reliability of stable fiber Bragg grating sensor system for monitoring temperature and strain individually

Chang

Yeh

Chow³

2019

Meas. Sci. Technol.

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In the investigation, the fiber Bragg grating-based sensor system is proposed and demonstrated to monitor temperature and strain individually. In order to obtain a stable and accurate sensing signal, an erbium-doped fiber (EDF) ring laser scheme with a 2 m long unpumped EDF as the saturable absorber is also proposed. Hence, the observed stabilization of output power and sensing wavelength can be less than 0.1 dB and 0.02 nm, and 0.3 dB and 0.02 nm in the sensor system, respectively, in the back-to-back state and 25 km fiber link. Hence, this sensor system can improve the output stability of the sensing signal. In addition, the temperature- and strain-induced wavelength shifts can be operated in the range of 20 °C–70 °C and 0–37 500 µε, respectively.

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