Thermal treatment of silica optical fibers with CO2-laser radiation
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Abstract
We investigate theoretically and experimentally the effect of high-power CO2–laser radiation on silica optical fibers. We show that it takes several tens of milliseconds to heat the standard single–mode silica optical fiber to the fusing temperature of silica with the focused radiation of the CO2 laser of an output power of about 5 W. A point by point exposure of the optical fiber to the focused radiation of the CO2 laser under simultaneous axial tension results in a periodic necking of the optical fiber. Such an alteration of fiber parameters constitutes the Long Period Fiber Grating
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