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Low-temperature hypersensitization of phosphosilicate waveguides in hydrogen

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Abstract

Conventional hydrogen loading of phosphosilicate optical fibers at relatively low temperatures (80 °C) is sufficient to enhance the fiber’s photosensitivity after hydrogen outdiffusion, allowing permanent Bragg grating structures to be produced. Thermal sensitization is proposed to be a major contributor to stable index change.

© 2001 Optical Society of America

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