Real-time fiber Bragg grating measurement system using temperature-controlled Fourier domain mode locking laser

Tatsuya Yamaguchi; Yukitaka Shinoda

doi:10.1117/1.OE.56.6.066112

21 June 2017 Real-time fiber Bragg grating measurement system using temperature-controlled Fourier domain mode locking laser

Tatsuya Yamaguchi, Yukitaka Shinoda

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Optical Engineering, Vol. 56, Issue 6, 066112 (June 2017). https://doi.org/10.1117/1.OE.56.6.066112

Abstract

We constructed a temperature-controlled Fourier domain mode locking (TC-FDML) laser capable of high-speed wavelength sweeping and developed a real-time fiber Bragg grating (FBG) measurement system. The TC-FDML laser can perform high-speed wavelength sweeping at a sweep frequency of 50.7 kHz with a scan range of ∼60 nm in the 1.55-μm band. This system uses a data acquisition system mounting an analog/digital converter and field programmable gate array that enables real-time FBG measurement at a sampling frequency of 250 MHz. Using bidirectional wavelength sweeping by the TC-FDML laser, the system has a measurement time resolution of 9.9 μs. We show that the developed system can measure high-speed vibrations of several kHz and perform simultaneous and continuous measurements of multiple FBGs for a period of one hour.

CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Tatsuya Yamaguchi and Yukitaka Shinoda "Real-time fiber Bragg grating measurement system using temperature-controlled Fourier domain mode locking laser," Optical Engineering 56(6), 066112 (21 June 2017). https://doi.org/10.1117/1.OE.56.6.066112

Received: 16 March 2017; Accepted: 5 June 2017; Published: 21 June 2017

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