We report on high-energy picosecond pulse generation from a passively Q-switched and fiber-amplified microchip laser system. Initially, the utilized microchip lasers produce pulses with durations of around 100 ps at 1064 nm central wavelength. These pulses are amplified to energies exceeding 100 μJ, simultaneously chirped and spectrally broadened by self-phase modulation using a double stage amplifier based on single-mode LMA photonic crystal fibers at repetition rates of up to 1 MHz. Subsequently, the pulse duration of chirped pulses is reduced by means of nonlinear pulse compression to durations of 2.7 ps employing a conventional grating compressor and 4.7 ps using a compact compressor based on a chirped volume Bragg grating.
© 2012 Optical Society of America
Lasers and Laser Optics
Original Manuscript: March 14, 2012
Revised Manuscript: May 2, 2012
Manuscript Accepted: May 3, 2012
Published: June 21, 2012
A. Steinmetz, F. Jansen, F. Stutzki, R. Lehneis, J. Limpert, and A. Tünnermann, "Sub-5-ps, multimegawatt peak-power pulses from a fiber-amplified and optically compressed passively Q-switched microchip laser," Opt. Lett. 37, 2550-2552 (2012)