Ultrafast FBG Interrogator Based on Time-Stretch Method

We demonstrate an experimental realization of the time-stretch configured fiber Bragg grating (FBG) interrogator with an ultrafast speed. The interrogator consists of a home-made ultrabroadband fiber laser, an FBG sensor array, and two dispersive elements (single mode fibers). A time-stretch method...

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Bibliographic Details
Published in:IEEE photonics technology letters 2016-04, Vol.28 (7), p.778-781
Main Authors: Lei, Meng, Zou, Weiwen, Li, Xing, Chen, Jianping
Format: Article
Language:English
Subjects:
Arrays
Bandwidth
fiber Bragg grating (FBG)
Fiber gratings
Fiber lasers
Fibers
Mapping
mode-locked laser (MLL)
Optical fiber dispersion
Optical fiber sensors
Optical pulses
Photonics
Real time
Sensor arrays
Time stretch
wavelength-to-time mapping
Wavelengths
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Summary:We demonstrate an experimental realization of the time-stretch configured fiber Bragg grating (FBG) interrogator with an ultrafast speed. The interrogator consists of a home-made ultrabroadband fiber laser, an FBG sensor array, and two dispersive elements (single mode fibers). A time-stretch method is employed to convert the wavelength shift of the FBG sensor array to time shift via the principle of wavelength-to-time mapping. It is theoretically and experimentally demonstrated that the wavelength-related time shift suffers no influence although the Bragg wavelength and bandwidth of the strained FBG might be different. The interrogator works in real time, so that a single-shot measurement without carrying out any averaging is feasible.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2015.2513903