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Proceedings Paper

A UV laser source for biological and chemical sensing
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Paper Abstract

Optical parametric oscillator (OPO) and sum-frequency mixing (SFM) devices are useful tools for constructing ultraviolet (UV) laser sources for fluorescence spectroscopy. Here, a compact UV-laser sources based on frequency conversion of an actively Q-switched Nd:YAG laser is presented. The second harmonic generation from a Nd:YAG laser was utilized as pump radiation for a periodically poled KTiOPO4 nanosecond optical parametric oscillator. The OPO-signal and the remaining pump were spatially mode-matched for Type I SFM in a β-barium borate (BBO) crystal and UV radiation at 293 nm could be generated. This corresponds to a conversion efficiency of 2% with respect to the 532 nm harmonic radiation. The wavelength region accessible with this UV source is useful for chemical and biological sensing. Excitation of tryptophan at 293 nm for detection of fluorescence emission in ovalbumin and transthyretin was demonstrated.

Paper Details

Date Published: 12 January 2004
PDF: 10 pages
Proc. SPIE 5240, Laser Radar Technology for Remote Sensing, (12 January 2004); doi: 10.1117/12.510471
Show Author Affiliations
Mikael Tiihonen, Royal Institute of Technology (Sweden)
Valdas Pasiskevicius, Royal Institute of Technology (Sweden)
Fredrik Laurell, Royal Institute of Technology (Sweden)
Per Hammarstrom, Linkoping Univ. (Sweden)
Mikael Lindgren, Swedish Defense Research Agency (Sweden)

Published in SPIE Proceedings Vol. 5240:
Laser Radar Technology for Remote Sensing
Christian Werner, Editor(s)

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