100% reflectivity Bragg reflectors produced in optical fibres by single excimer laser pulses

Publisher Website
Google Scholar
Abstract
It is shown for the first time that fibre gratings with reflectivities in excess of 99.8% and fractional bandwidths of 0.005 (7.5 nm or 970 GHz at 1550 nm) can be written by interferometric side exposure of a fibre core to a single 40 mJ UV pulse of 20 ns duration at 248 nm. These highly efficient reflectors are formed by a new mechanism in which the core glass fuses, resulting in a very large periodic modulation of the refractive index. They are stable at temperatures as high as 800°C.

This publication has 0 references indexed in Scilit: