Pulse energy of 151 nJ from ultrafast thulium-doped chirped-pulse fiber amplifier.
We report on chirped-pulse amplification of an ultrafast thulium-doped fiber laser. Pulses with an energy of 3.3 nJ and a bandwidth-limited pulse duration of 195 fs could be amplified to 151 nJ, which corresponds to an average power of 5.7 W at 37.6 MHz pulse repetition rate. The maximum output power was limited by the available pump power. The pulses could be dechirped to a duration of 258 fs.
Haxsen
Frithjof
F
Laser Zentrum Hannover e.V., Hollerithallee 8, D-30419 Hannover, Germany. f.haxsen@lzh.de
Wandt
Dieter
D
Morgner
Uwe
U
Neumann
Joerg
J
Kracht
Dietmar
D