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

Wenhua Guo, Patrik Holmberg, Fredrik Laurell, and Michael Fokine
Opt. Mater. Express 5(11) 2702-2714 (2015)

Thermal stability of chemical composition gratings in fluorine–germanium-doped silica fibers

Michael Fokine
Opt. Lett. 27(12) 1016-1018 (2002)

Formation of thermally stable chemical composition gratings in optical fibers

Michael Fokine
J. Opt. Soc. Am. B 19(8) 1759-1765 (2002)

In-situ non-contact high-temperature measurement of an optical fiber up to the glass softening point

K. Mühlberger, C. M. Harvey, and M. Fokine
Opt. Express 29(5) 7825-7832 (2021)

Thermal stability of oxygen-modulated chemical-composition gratings in standard telecommunication fiber

Michael Fokine
Opt. Lett. 29(11) 1185-1187 (2004)