Abstract

The thermal response of optical fibers during ${\mathrm{CO}}_2$ laser irradiation has been characterized by using thermally stable short-period fiber Bragg gratings, referred to as chemical composition gratings. ${\mathrm{CO}}_2$ laser beam profiling was performed by scanning the beam across a 1 mm long grating, providing a spatial resolution given by the fiber diameter. The thermal dynamics during square pulse irradiation has been recorded for temperatures in excess of 1700°C, with heating and cooling rates as high as $10,500°\mathrm{C}{\mathrm{s}}^{-1}$ and $6500°\mathrm{C}{\mathrm{s}}^{-1}$, respectively.

© 2013 Optical Society of America

Fabrication of long-period fiber gratings through periodic ablation using a focused CO₂-laser beam

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Formation of thermally stable chemical composition gratings in optical fibers

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