We describe a diode-pumped Nd:YAG laser that is suitable for micromachining applications and is capable of generating 2.3-mJ pulses at a 4-kHz pulse repetition frequency. The output pulse duration is 20.5 ps. The system is based on a Nd:YAG regenerative amplifier with a novel four-pass postamplifier. The postamplifier incorporates birefringent depolarization compensation and simultaneously prevents parasitic laser oscillation by use of a nonreciprocal beam path. These output pulse energies are achieved without the use of chirped pulse amplification.
© 2001 Optical Society of America
Original Manuscript: August 14, 2000
Revised Manuscript: February 14, 2001
Published: June 20, 2001
Michael J. P. Dymott and Kurt J. Weingarten, "Picosecond diode-pumped laser system with 9.3-W average power and 2.3-mJ pulse energy," Appl. Opt. 40, 3042-3045 (2001)