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A UV laser source for biological and chemical sensing
KTH, Superseded Departments, Physics.
KTH, Superseded Departments, Physics.ORCID iD: 0000-0002-2508-391X
KTH, Superseded Departments, Physics.ORCID iD: 0000-0001-7688-1367
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2004 (English)In: FREE-SPACE LASER COMMUNICATION AND ACTIVE LASER ILLUMINATION III / [ed] Voelz, DG; Ricklin, JC, BELLINGHAM: SPIE-INT SOC OPTICAL ENGINEERING , 2004, Vol. 5240, 127-136 p.Conference paper, Published paper (Refereed)
Abstract [en]

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(1). The OPO-signal and the remaining pump were spatially mode-matched for Type I SFM in a beta-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.

Place, publisher, year, edition, pages
BELLINGHAM: SPIE-INT SOC OPTICAL ENGINEERING , 2004. Vol. 5240, 127-136 p.
Series
PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE), ISSN 0277-786X ; 5160
Keyword [en]
ultraviolet laser source, optical parametric oscillator, sum-frequency mixing, chemical sensing, biological sensing
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:kth:diva-43936DOI: 10.1117/12.510471ISI: 000189409800014Scopus ID: 2-s2.0-1842635728ISBN: 0-8194-5033-2 (print)OAI: oai:DiVA.org:kth-43936DiVA: diva2:451256
Conference
Conference on Free-Space Laser Communication and Active Laser Illumination III. San Diego, CA. AUG 04-06, 2003
Note
QC 20111025Available from: 2011-10-25 Created: 2011-10-19 Last updated: 2015-03-30Bibliographically approved

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Pasiskevicius, ValdasLaurell, Fredrik

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