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Optical Engineering • Open Access

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

Paper 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 - μ m 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    μ s . 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.

Paper Details

Date Published: 21 June 2017
PDF: 10 pages
Opt. Eng. 56(6) 066112 doi: 10.1117/1.OE.56.6.066112
Published in: Optical Engineering Volume 56, Issue 6
Show Author Affiliations
Tatsuya Yamaguchi, Nihon Univ. (Japan)
Yukitaka Shinoda, Nihon Univ. (Japan)

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