Abstract:Based on the demand for monitoring conductivity, temperature, and depth (CTD) in the ocean, a hybrid coated long-period fiber grating, tilted fiber Bragg grating, and fiber Bragg grating (LPG-TFBG-FBG) structure is proposed, which could eliminate the mutual interference of CTD in measurements. First, according to coupled mode theory and phase matching conditions, the coupling equation of each segment of the grating is deduced. Next, through the difference iterative method, the total transfer matrix of coated L… Show more
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