Characteristics of hydrogenated fiber Bragg gratings
Resource
Applied Physics A: Materials Science & Processing 64 (2): 191-197
Journal
Applied Physics A: Materials Science and Processing
Journal Volume
64
Journal Issue
2
Pages
191-197
Date Issued
1997
Date
1997
Author(s)
Abstract
By utilizing both hydrogen loading for photosensitivity enhancement and a phase mask for holographic exposure, we have fabricated fiber Bragg grating with controllable reflectance and bandwidth. The evolution of hydrogen diffusion into a single-mode optical fiber before exposure, and out of the fiber after exposure was characterized, and the results were consistent with the theoretical modeling. The shifting of Bragg wavelength and thermal reliability were found related to the hydrogen behavior inside the fiber. One solution to prevent Bragg wavelength from drifting after the grating was formed and hence to increase the grating's reliability was to anneal it so that the residual hydrogen was forced out of the optical fiber in a short time.
Other Subjects
Annealing; Diffraction gratings; Diffusion; Hydrogen; Photosensitivity; Ultraviolet radiation; Bragg grating; Thermal reliability; Optical fiber fabrication
Type
journal article
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