title: High-pulse-energy actively Q-switched Tm3+-doped silica 2 microm fiber laser pumped at 792 nm.
abstract: A diode-pumped Q-switched Tm(3+)-doped double-clad silica fiber laser is reported providing average powers of up to 30 W at pulse widths of only 41 ns and repetition rates in the range of 10-125 kHz. Up to 270 microJ pulse energy was produced. Amplified spontaneous emission (ASE) buildup limits the maximum peak power, and the pump power and average output power at the point of ASE induced clamping were found to depend linearly on the repetition rate.
authors.affiliation: French-German Research Institute of Saint Louis ISL, 5 Rue du Général Cassagnou, BP 70034, 68301 Saint-Louis Cedex, France. Marc.Eichhorn@isl.eu
authors.forename: Marc
authors.initials: M
authors.lastname: Eichhorn
authors.forename: Stuart D
authors.initials: SD
authors.lastname: Jackson