title: Nanosecond sum-frequency generating optical parametric oscillator using simultaneous phase matching.
abstract: We report a nanosecond sum-frequency generating optical parametric oscillator based on a single KTiOAsO4 crystal that is simultaneously phase matched for optical parametric generation and sum-frequency generation. Pumped at a wavelength of 1064 nm by a Q-switched Nd:YAG laser, this device produces 10.4-ns-long 8.3 mJ red pulses at a wavelength of 627 nm with 21% energy conversion efficiency. This device provides a simple and efficient method for converting high energy Nd:YAG lasers to a red wavelength.
authors.forename: Z Gürkan
authors.initials: ZG
authors.lastname: Figen
authors.forename: Orhan
authors.initials: O
authors.lastname: Aytür