title: Improved efficiency of a pulsed optical parametric oscillator by delayed double-pass pump.
abstract: 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%.
authors.affiliation: College of Optical Sciences, The University of Arizona, Tucson, AZ 85721, USA. ykaneda@optics.arizona.edu
authors.forename: Yushi
authors.initials: Y
authors.lastname: Kaneda
authors.forename: N
authors.initials: N
authors.lastname: Peyghambarian
authors.forename: Kenshi
authors.initials: K
authors.lastname: Miyazono
authors.forename: Hiroya
authors.initials: H
authors.lastname: Shimatani
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Honda
authors.forename: Masashi
authors.initials: M
authors.lastname: Yoshimura
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Mori
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Kitaoka
authors.forename: Takatomo
authors.initials: T
authors.lastname: Sasaki