Compact, passively Q-switched, all-solid-state master oscillator-power amplifier-optical parametric oscillator (MOPA-OPO) system pumped by a fiber-coupled diode laser generating high-brightness, tunable, ultraviolet radiation.
We report on a compact, tunable ultraviolet laser system that consists of an optical parametric oscillator (OPO) and a longitudinally diode-pumped Nd:YAG master oscillator-power amplifier (MOPA). The pump energy for the whole laser system is supplied via a single delivery fiber. Nanosecond pulses are produced by an oscillator that is passively Q-switched by a Cr(4+):YAG crystal. The OPO is pumped by the second harmonic of the Nd:YAG MOPA. Continuously tunable radiation is generated by an intracavity sum-frequency mixing process within the OPO in the range of 245-260 nm with high beam quality. Maximum pulse energies of 1.2 mJ were achieved, which correspond to an optical efficiency of 3.75%, relating to the pulse energy of the MOPA at 1064 nm.
Peuser
Peter
P
EADS Innovation Works, IW-SI, P.O. Box 800465, 81663 München, Germany. peter.peuser@eads.net
Platz
Willi
W
Fix
Andreas
A
Ehret
Gerhard
G
Meister
Alexander
A
Haag
Matthias
M
Zolichowski
Paul
P
D053844:Lasers, Solid-State; D055096:Optical Devices; D055620:Optical Phenomena; D014466:Ultraviolet Rays