Abstract

Gratings are now of great importance to many applications involving optical fibers. Typically, gratings are written in fibers with germanium-doped silica cores. These gratings have been demonstrated to exhibit superior photosensitivity when loaded with molecular hydrogen or deuterium at high pressures.¹ The enhanced photosensitivity enables one to readily achieve high refractive index changes in any GeO₂-doped fiber. In this work, the thermal reliability of gratings in hydrogen-loaded fibers is studied.

© 1996 Optical Society of America