We report on a side-pumped Nd:phosphate laser regenerative amplifier that delivers laser pulses of as much as 100 mJ in a single TEM mode. The laser beam is mode matched to the amplification medium by an intracavity fused-silica phase plate for mode shaping and a telescope for adjustment of the beam mode to the amplification rod section such that most of the energy stored in the rod is transferred to the laser pulses. As a result of the good overlap and the low loss, an optical-to-optical conversion efficiency of as much as 10% was measured for a pumping current of 80 A and greater than 100-mJ output pulses.
© 2001 Optical Society of America
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.3280) Lasers and laser optics : Laser amplifiers
(140.3300) Lasers and laser optics : Laser beam shaping
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3570) Lasers and laser optics : Lasers, single-mode
V. Bagnoud, J. Luce, L. Videau, and C. Rouyer, "Diode-pumped regenerative amplifier delivering 100-mJ single-mode laser pulses," Opt. Lett. 26, 337-339 (2001)