Abstract
A detailed study on analyzing the crosstalk in a wavelength division
multiplexed fiber laser sensor array system based on a digital phase generated
carrier interferometric interrogation scheme is reported. The crosstalk effects
induced by the limited optical channel isolation of a dense wavelength division
demultiplexer (DWDM) are presented, and the necessary channel isolation to
keep the crosstalk negligible to the output signal was calculated via Bessel
function expansion and demonstrated by a two serial fiber laser sensors system.
Finally, a three-element fiber laser sensor array system with a 50-dB channel-isolation
DWDM was built up. Experimental results demonstrated that there was no measurable
crosstalk between the output channels.
© 2008 IEEE
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