标题：Analysis on Spatial and Temporal Resolution in Photonic Time Stretch Frequency Domain Reflectometry Based Fully Distributed Fiber Bragg Grating Sensors
作者：Ahmad, Eamonn J.; Feng, Dejun; Wang, Chao
作者机构：[Ahmad, Eamonn J.; Feng, Dejun; Wang, Chao] Univ Kent, Sch Engn & Digital Arts, Canterbury CT2 7NT, Kent, England.; [Feng, Dejun] Shandong Univ, Sch 更多
会议名称：15th International Conference on Optical Communications and Networks (ICOCN)
会议日期：SEP 24-27, 2016
来源：2016 15TH INTERNATIONAL CONFERENCE ON OPTICAL COMMUNICATIONS AND NETWORKS (ICOCN)
关键词：Chirped fiber Bragg grating (CFBG); chromatic dispersion; distributed; sensing; frequency-domain reflectometry; photonic time stretch; temporal; interferometry
摘要：We propose and experimentally demonstrate fully distributed strain sensing along the length of a linearly chirped fibre Bragg grating with simultaneously high spatial and temporal resolution based on photonic time stretch frequency domain reflectometry (PTS-FDR). The distributed strain information is reconstructed from the instantaneous RF frequency of a temporal interference waveform via short-time Fourier transform analysis. The utility of the proposed method is characterized by analysing the spatial and temporal resolution obtained. An ultrafast strain measurement at a speed of 50 MHz with a high spatial resolution of 31.5 mu m over a gauge length of 25 mm and a strain resolution of 9.1 mu epsilon have been achieved.