Formation dynamics of Bragg phase gratings in photosensitive optical fibers

A double-well potential model based on the local two-photon absorption photobleaching mechanism in blue-green wavelength region by oxygen-deficient Ge-Si bonds is presented and analyzed for describing the photostructural changes of a germanosilicate optical fiber. The growth dynamics are also derived from the coupled wave analysis, which describes the overall temporal behaviors of the grating reflectance and transmittance during the grating formations.<
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