Improved efficiency of a pulsed optical parametric oscillator by delayed double-pass pump.
By delaying the second pass of the pump of a singly resonant optical parametric oscillator, the conversion efficiency can be improved. We show the experimental results of an intracavity-doubled singly resonant parametric oscillator pumped by a Q-switched laser. Using 0.49 mJ of pump energy at 532 nm from a diode-pumped Nd:YAG laser, 0.085 mJ of 488 nm was obtained with the optimum delay for the second pass of the pump, giving a conversion efficiency of 17%. The improvement over the case of a single-pass pump was 85%, and the improvement over the double-pass pump with a small delay was 40%.
Kaneda
Yushi
Y
College of Optical Sciences, The University of Arizona, Tucson, AZ 85721, USA. ykaneda@optics.arizona.edu
Peyghambarian
N
N
Miyazono
Kenshi
K
Shimatani
Hiroya
H
Honda
Yoshiyuki
Y
Yoshimura
Masashi
M
Mori
Yusuke
Y
Kitaoka
Yasuo
Y
Sasaki
Takatomo
T