Straining a Ge-doped optical fiber increases its UV photosensitivity. The speed of grating fabrication in a standard AT&T telecommunication fiber increases by 18 times, while the final refractive-index change is enhanced by a factor of 5. Measurements reveal opposite changes in the stress of the fiber core induced by UV light in strained and unstrained fibers.
© 2000 Optical Society of America
E. Salik, D. S. Starodubov, and J. Feinberg, "Increase of photosensitivity in Ge-doped fibers under strain," Opt. Lett. 25, 1147-1149 (2000)