Ultrafast FBG Interrogator Based on Time-Stretch Method – 智能微波光波融合创新中心

作者：Meng Lei, Weiwen Zou * , Xing Li, and Jianping Chen
摘要：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.
出版源：IEEE Photonics Technology Letters, vol. 28, pp. 778-781, Apr 1 2016.