High-average-power KTiOAsO4 optical parametric oscillator.
Using noncritically phase-matched 1-cm(2) -aperture KTiOAsO(4) (KTA) crystals in an optical parametric oscillator (OPO), we have demonstrated a sustained average signal power of 33 W at 1534.7 nm. To our knowledge, this is the highest-average-power signal ever generated by an OPO. The pump source was a 100-Hz Q -switched 1064-nm Nd:YAG laser. Compared with that of the similar and more-common material KTiOPO>(4) , idler absorption in KTA is negligible, allowing high-power operation with minimal thermally induced refractive distortion in the OPO crystal.
Webb
M S
MS
Research Division, SEO Boston, Schwartz Electro-Optics Inc., 135 South Road, Bedford, Massachusetts 01730, USA.
Moulton
P F
PF
Kasinski
J J
JJ
Burnham
R L
RL
Loiacono
G
G
Stolzenberger
R
R