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20 January 2006 SFDM/CWDM of fiber-optic Fizeau strain sensors
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Proceedings Volume 6027, ICO20: Optical Information Processing; 602747 (2006)
Event: ICO20:Optical Devices and Instruments, 2005, Changchun, China
In this paper, a novel method for multiplexing a large number of fiber-optic Fizeau sensors using coarse wavelength division multiplexing (CWDM) and spatial-frequency division multiplexing (SFDM) is proposed and demonstrated. A CWDM device is used to multiplex signals from different sensor channels occupying different wavelength regions divided by the CWDM. More than 10 Fizeau sensors arranged in a single channel can be multiplexed by using SFDM due to the long cavity length of the Fizeau sensor. The experimental results show that a strain accuracy of ±5με is achieved. As up to 100 sensors can be multiplexed simultaneously, this approach can improve the multiplexing capacity of Fizeau strain sensors significantly.
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Y. J. Rao, C. X. Zhou, and T. Zhu "SFDM/CWDM of fiber-optic Fizeau strain sensors", Proc. SPIE 6027, ICO20: Optical Information Processing, 602747 (20 January 2006);

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