title: High-power 266 nm ultraviolet generation in yttrium aluminum borate.
abstract: A yttrium aluminum borate [YAl(3)(BO(3))(4)] (YAB) crystal with UV cutoff wavelength of 165 nm is used as the nonlinear optical crystal for fourth harmonic generation. The fundamental frequency laser at 1064 nm from an Nd:YVO(4) master oscillator power amplifier laser was frequency doubled to 532 nm. Using the type I phase-matching YAB crystal, a 5.05 W average power 266 nm UV laser was obtained at the pulse repetition frequency of 65 kHz, corresponding to the conversion efficiency of 12.3% from 532 to 266 nm. The experimental results show great potential for the application of using YAB as a nonlinear optical crystal to get high-power fourth harmonic generation.
authors.affiliation: State Key Laboratory of Tribology, Center for Photonics and Electronics, Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084, China. qiangliu@mail.tsinghua.edu.cn
authors.forename: Qiang
authors.initials: Q
authors.lastname: Liu
authors.forename: Xingpeng
authors.initials: X
authors.lastname: Yan
authors.forename: Mali
authors.initials: M
authors.lastname: Gong
authors.forename: Hua
authors.initials: H
authors.lastname: Liu
authors.forename: Ge
authors.initials: G
authors.lastname: Zhang
authors.forename: Ning
authors.initials: N
authors.lastname: Ye