Short pulse, diode pumped, passively Q-switched Nd:YAG laser at 946 nm quadrupled for UV production

O. P. Kimmelma; I. Tittonen; S. C. Buchter

doi:10.2971/jeos.2008.08008

Journal of the European Optical Society - Rapid publications, Vol 3 (2008)

Short pulse, diode pumped, passively Q-switched Nd:YAG laser at 946 nm quadrupled for UV production

O. P. Kimmelma, I. Tittonen, S. C. Buchter

Abstract

We report on a compact UV-laser with a short pulse length of 1.9 ns at 236 nm. A passively Q-switched quasi-three-level Nd:YAG laser at 946 nm acts as the pump source. UV pulses are produced by two consecutive single-pass frequency doubling events, the first one from IR to blue with a BIBO crystal and the second one from blue to deep-UV with a beta-BBO crystal. Conversion efficiency from 946 nm to 473 nm is 28% and from blue to UV 7%. Average power for UV is 7.6 mW with a energy and peak power of 230 nJ, and 120 W respectively.

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