A method of controllably damaging the surface of silica-based optical fibers is described, producing in short lengths the tensile strength typical of long proof-tested lengths. The stresscorrosion constant n is obtained relatively rapidly, by correlating the results of static and dynamic fatigue measurements. For damaged 125-ym-diameter fibers, with an average strength of 1.25 GPa, a value for n =20 was found, similar to that in pristine fibers.
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