| Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 3, 2008
|
|
|---|---|---|
| Article Number | 08008 | |
| Number of page(s) | 5 | |
| DOI | https://doi.org/10.2971/jeos.2008.08008 | |
| Published online | 06 February 2008 | |
Regular papers
Short pulse, diode pumped, passively Q-switched Nd:YAG laser at 946 nm quadrupled for UV production
1
Department of Micro and Nanosciences and Center for New Materials, Micronova, Helsinki University of Technology, FI-02150 Espoo, Finland
2
Arctic Photonics, Jorvas Hitech Center, Hirsalantie 11, FI-02420 Jorvas, Finland
Received:
14
November
2007
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 β-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.
Key words: Solid state lasers / passively Q-switched lasers / quasi-three-level lasers / UV-lasers / nonlinear optics
© The Author(s) 2008. All rights reserved.
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