Highly Stabilized Phase-Shifted Fiber Bragg Grating Sensing System for Ultrasonic Detection

Jingjing Guo; Changxi Yang

doi:10.1109/LPT.2015.2396530

Highly Stabilized Phase-Shifted Fiber Bragg Grating Sensing System for Ultrasonic Detection

Jingjing Guo
, Changxi Yang

Tsinghua University

Research output: Contribution to journal › Article › peer-review

73 Scopus citations

Abstract

A phase-shifted fiber Bragg grating (PS-FBG) sensing system based on Pound-Drever-Hall (PDH) technique is proposed and experimentally demonstrated for ultrasonic detection. The sensing system is highly stabilized as the laser is frequency locked to the PS-FBG resonance using PDH technique. This scheme reduces the effect of laser intensity noise and enables high-sensitivity ultrasonic detection by monitoring the error signal of frequency detuning between the laser and the PS-FBG resonance. Response of the frequency-locked PS-FBG to ultrasound is done by testing the ultrasonic refection of a 0.4-mm plastic film, immersed in water. The sensor exhibits a high signal-to-noise ratio of 48 dB at 200 kHz and a noise-limited detectable strain of 8.7 pε above 10 kHz. Frequency response of PS-FBG from 100 kHz to 1 MHz was also characterized.

Original language	English
Article number	7024920
Pages (from-to)	848-851
Number of pages	4
Journal	IEEE Photonics Technology Letters
Volume	27
Issue number	8
DOIs	https://doi.org/10.1109/LPT.2015.2396530
State	Published - 15 Apr 2015
Externally published	Yes

Keywords

Fiber Bragg gratings
Fiber optics sensors
Non-destructive testing

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10.1109/LPT.2015.2396530

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title = "Highly Stabilized Phase-Shifted Fiber Bragg Grating Sensing System for Ultrasonic Detection",

abstract = "A phase-shifted fiber Bragg grating (PS-FBG) sensing system based on Pound-Drever-Hall (PDH) technique is proposed and experimentally demonstrated for ultrasonic detection. The sensing system is highly stabilized as the laser is frequency locked to the PS-FBG resonance using PDH technique. This scheme reduces the effect of laser intensity noise and enables high-sensitivity ultrasonic detection by monitoring the error signal of frequency detuning between the laser and the PS-FBG resonance. Response of the frequency-locked PS-FBG to ultrasound is done by testing the ultrasonic refection of a 0.4-mm plastic film, immersed in water. The sensor exhibits a high signal-to-noise ratio of 48 dB at 200 kHz and a noise-limited detectable strain of 8.7 pε above 10 kHz. Frequency response of PS-FBG from 100 kHz to 1 MHz was also characterized.",

keywords = "Fiber Bragg gratings, Fiber optics sensors, Non-destructive testing",

author = "Jingjing Guo and Changxi Yang",

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doi = "10.1109/LPT.2015.2396530",

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AU - Guo, Jingjing

AU - Yang, Changxi

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N2 - A phase-shifted fiber Bragg grating (PS-FBG) sensing system based on Pound-Drever-Hall (PDH) technique is proposed and experimentally demonstrated for ultrasonic detection. The sensing system is highly stabilized as the laser is frequency locked to the PS-FBG resonance using PDH technique. This scheme reduces the effect of laser intensity noise and enables high-sensitivity ultrasonic detection by monitoring the error signal of frequency detuning between the laser and the PS-FBG resonance. Response of the frequency-locked PS-FBG to ultrasound is done by testing the ultrasonic refection of a 0.4-mm plastic film, immersed in water. The sensor exhibits a high signal-to-noise ratio of 48 dB at 200 kHz and a noise-limited detectable strain of 8.7 pε above 10 kHz. Frequency response of PS-FBG from 100 kHz to 1 MHz was also characterized.

AB - A phase-shifted fiber Bragg grating (PS-FBG) sensing system based on Pound-Drever-Hall (PDH) technique is proposed and experimentally demonstrated for ultrasonic detection. The sensing system is highly stabilized as the laser is frequency locked to the PS-FBG resonance using PDH technique. This scheme reduces the effect of laser intensity noise and enables high-sensitivity ultrasonic detection by monitoring the error signal of frequency detuning between the laser and the PS-FBG resonance. Response of the frequency-locked PS-FBG to ultrasound is done by testing the ultrasonic refection of a 0.4-mm plastic film, immersed in water. The sensor exhibits a high signal-to-noise ratio of 48 dB at 200 kHz and a noise-limited detectable strain of 8.7 pε above 10 kHz. Frequency response of PS-FBG from 100 kHz to 1 MHz was also characterized.

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KW - Fiber optics sensors

KW - Non-destructive testing

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DO - 10.1109/LPT.2015.2396530

M3 - 文章

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ER -

Highly Stabilized Phase-Shifted Fiber Bragg Grating Sensing System for Ultrasonic Detection

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Keywords

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