19 May 2006 Study of Fiber Bragg grating sensor system based on OFDR/WDM
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A novel interrogating fiber grating array based on optical frequency domain reflectometry (OFDR) and wavelength division multiplexing (WDM) techniques was reported, and address inquiry of different measurement optical fiber was realized. Fundamental principle of OFDR has been analyzed and the space resolution and measurement range of this system were calculated theoretically. The calculated system's spatial resolution was 2.5m, and measurement range was 2000m. Thanks to the minimum resolution within meter range, frequency fluctuation due to trivial vibration in the environment won't cause error in the course of interrogating. Experiment studies on 3×3 fiber grating array were carried out. Experimental results confirm that with sufficiently large power of the light source, the novel fiber grating sensing array has attractive potential to interrogate and modulate several hundreds of fiber gratings in that it makes full use of optical frequency and wavelength information, and can be well applied to the distributed stress detection of two- or three- dimensional large structures
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Fei Wu, Fei Wu, Yanan Cai, Yanan Cai, Lulu Cai, Lulu Cai, Lijuan Huang, Lijuan Huang, Zhiquan Li, Zhiquan Li, "Study of Fiber Bragg grating sensor system based on OFDR/WDM", Proc. SPIE 6150, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 615022 (19 May 2006); doi: 10.1117/12.676421; https://doi.org/10.1117/12.676421

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