Abstract

A yttrium aluminum borate [YAl3(BO3)4] (YAB) crystal with UV cutoff wavelength of 165nm is used as the nonlinear optical crystal for fourth harmonic generation. The fundamental frequency laser at 1064nm from an Nd:YVO4 master oscillator power amplifier laser was frequency doubled to 532nm. Using the type I phase-matching YAB crystal, a 5.05W average power 266nm UV laser was obtained at the pulse repetition frequency of 65kHz, corresponding to the conversion efficiency of 12.3% from 532 to 266nm. The experimental results show great potential for the application of using YAB as a nonlinear optical crystal to get high-power fourth harmonic generation.

© 2011 Optical Society of America

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