We report amplification of sub-10–100 ns pulses with repetition rates from 1 to 20 kHz in a rod-type thulium-doped photonic crystal fiber with 80 μm core diameter. The rod is pumped with a 793 nm laser diode and produces the highest peak power at 1 kHz repetition rate with 6.5 ns pulse duration and more than 7 W average output power. This result exemplifies the potential of this fiber design to scale pulse peak powers and pulse energies to the megawatt and multi-millijoule range in the 2 μm wavelength regime.
© 2013 Optical Society of America
Lasers and Laser Optics
Original Manuscript: November 14, 2012
Revised Manuscript: January 17, 2013
Manuscript Accepted: January 28, 2013
Published: February 25, 2013
Christian Gaida, Martin Gebhardt, Pankaj Kadwani, Lasse Leick, Jes Broeng, Lawrence Shah, and Martin Richardson, "Amplification of nanosecond pulses to megawatt peak power levels in Tm3+-doped photonic crystal fiber rod," Opt. Lett. 38, 691-693 (2013)