A compact OPO/SFG laser for ultraviolet biological sensing: TECHNOLOGY AND DEVICES
2004 (English)In: SOLID STATE LASERS XIII: TECHNOLOGY AND DEVICES / [ed] Scheps, R; Hoffman, HJ, BELLINGHAM: SPIE-INT SOC OPTICAL ENGINEERING , 2004, Vol. 5332, 134-142 p.Conference paper (Refereed)
A compact parametric oscillator (OPO) with intracavity sum-frequency generation (SFG) to generate 293 nm UV laser irradiation, was developed. The OPO/SFG device was pumped by a 100 Hz Nd:YAG laser (1064 nm) of own design, including subsequent second harmonic generation (SHG) in an external periodically poled KTiOPO4 (KTP) crystal. The whole system could be used to deliver more than 30 muJ laser irradiation per pulse (100 Hz) at 293 nm. The UV laser light was introduced in an optical fiber attached to a sample compartment allowing detection of fluorescence emission using a commercial spectrometer. Aqueous samples containing biomolecules (ovalbumin) or bacteria spores (Bacillus subtilis) were excited by the UV-light at 293 nm resulting in strong fluorescence emission in the range 325-600 nm.
Place, publisher, year, edition, pages
BELLINGHAM: SPIE-INT SOC OPTICAL ENGINEERING , 2004. Vol. 5332, 134-142 p.
, PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE), ISSN 0277-786X ; 5332
ultraviolet laser source, optical parametric oscillator, sum-frequency mixing, chemical sensing, biological fluorescence, biological sensing
Atom and Molecular Physics and Optics
IdentifiersURN: urn:nbn:se:kth:diva-43931DOI: 10.1117/12.530292ISI: 000223223800016ScopusID: 2-s2.0-4344566606ISBN: 0-8194-5240-8OAI: oai:DiVA.org:kth-43931DiVA: diva2:451299
Conference on Solid State Lasers XIII. San Jose, CA. JAN 27-29, 2004
QC 201110252011-10-252011-10-192016-06-02Bibliographically approved