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Opt Lett. 1998 Mar 01;23(5):397-9. doi: 10.1364/ol.23.000397.

Fabrication of high-mechanical-resistance Bragg gratings in single-mode optical fibers with continuous-wave ultraviolet laser side exposure.

Optics letters

D Varelas, D M Costantini, H G Limberger, R P Salathé

PMID: 18084524 DOI: 10.1364/ol.23.000397

Abstract

The mechanical resistance of single-mode fibers containing fiber Bragg gratings inscribed with cw UV laser irradiation is almost identical to that of pristine fiber. The median breaking strength of the gratings' Weibull distribution is more than 5 GPa, and the m value is of the order of 70. Based on a dynamic fatigue model, a Bragg grating lifetime of 50 years with a failure probability of 0.001 is predicted, assuming a constant applied stress of 0.96 GPa.

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