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Article Abstract
The performance of a highly sensitive strain sensor based on nonlinear four-wave mixing (FWM) using a fiber Bragg grating (FBG) is investigated. The power change due to the wavelength shift induced by very small strain over the FBG is significantly magnified by a higher order FWM process. Strain sensitivity of 5.547 dBm/μϵ is achieved and minimum wavelength shift of 2.18×10 nm (which corresponds to a strain of 1.80×10 μϵ) is detected with uniform FBG, whereas in case of chirped FBG (CFBG) strain sensitivity of 0.3 dBm/μϵ with minimum detectable wavelength shift of 4×10 nm (which corresponds to a strain of 0.033 μϵ) is obtained.
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| http://dx.doi.org/10.1364/AO.57.009388 | DOI Listing |
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