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14 February 2005 A coarse wavelength-division-multiplexed extrinsic fiber Fabry-Perot sensor system
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In this paper, a novel method for multiplexing extrinsic fiber Fabry-Perot interferometric sensors (EFPIs) using the coarse wavelength-division-multiplexing technology (CWDM) is proposed and demonstrated, for the first time to our knowledge. The system and principle for sensing and multiplexing are described. A 1×4 CWDM is used to multiplex signals from four EFPIs with identical cavity length. The experimental results show that a strain accuracy of 2.5me is achieved. There is little cross-talk between adjacent sensor channels. This system improves the multiplexing capability of EFPIs by a factor of four. It is anticipated that such a sensor system could find important applications in smart materials and health monitoring for large structures.
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C. X. Zhou, Yun-Jiang Rao, and Jian Jiang "A coarse wavelength-division-multiplexed extrinsic fiber Fabry-Perot sensor system", Proc. SPIE 5634, Advanced Sensor Systems and Applications II, (14 February 2005);

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