Nanosecond switching of fiber Bragg gratings

Opt Express. 2007 Oct 29;15(22):14948-53. doi: 10.1364/oe.15.014948.

Abstract

A FBG was written in a two-hole fiber with internal alloy electrodes. Nanosecond high current pulses cause metal expansion, increase birefringence and tune the gratings with a response time of 29 ns. This short length, low loss, all-spliced high-speed wavelength switching devices described here has potential use in Q-switching fiber laser.