title: Short pulsed gain-switched fiber laser with improved efficiency utilizing unabsorbed pump recovery.
abstract: A simple solution for increasing the slope efficiency of a gain-switched fiber laser based on Yb-doped active fiber is presented. By adding a fiber amplifier stage, which recovers the unabsorbed pump light from the gain-switched oscillator, a significant increase in slope efficiency is achieved. The pulses at 1030-nm wavelength have an FWHM of 28 ns and a peak power of 2.3 kW.
authors.forename: Jaka
authors.initials: J
authors.lastname: Petelin
authors.forename: Vid
authors.initials: V
authors.lastname: Agrež
authors.forename: Boštjan
authors.initials: B
authors.lastname: Podobnik
authors.forename: Rok
authors.initials: R
authors.lastname: Petkovšek