High-efficiency frequency conversion into the deep ultraviolet in a partially deuterated ammonium dihydrogen phosphate (ADP) crystal is reported. For a 60% deuterated ADP crystal, the spontaneous Raman scattering intensity decreased by 38% compared with that of a pristine ADP crystal. At room temperature (24°C), noncritical phase-matching fourth harmonic generation of a 1053 nm laser was realized. The angular acceptance was 55.7 mrad, and the external conversion efficiency from 526 to 263 nm reached 85.3%.
© 2013 Optical Society of America
Original Manuscript: January 21, 2013
Revised Manuscript: April 18, 2013
Manuscript Accepted: April 18, 2013
Published: May 10, 2013
Shaohua Ji, Fang Wang, Miaomiao Xu, Lili Zhu, Xinguang Xu, Zhengping Wang, and Xun Sun, "Room temperature, high-efficiency, noncritical phase-matching fourth harmonic generation in partially deuterated ADP crystal," Opt. Lett. 38, 1679-1681 (2013)