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Rev Sci Instrum. 2009 May;80(5):054901. doi: 10.1063/1.3125625.
Photoacoustic technique to measure beam profile of pulsed laser systems.
Mallidi S1, Emelianov S.
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Abstract
The beam profiles of pulsed lasers are currently measured using either complementary metal oxide semiconductor (CMOS) or charge coupled device (CCD) cameras. Despite providing high-resolution beam profiles, these devices cannot work with high power lasers. If additional optical attenuators are used, beam distortions may occur. In this paper we demonstrate a high-resolution photoacoustic technique capable of measuring the beam profile of pulsed lasers. The beam profiles of a pulsed neodymium-doped yttrium aluminium garnet (Nd:YAG) laser and a pulsed optical parametric oscillator (OPO) laser system were measured using a polydimethylsiloxane film and a single element high-frequency ultrasonic transducer. The advantages and limitations of the developed photoacoustic technique are discussed.

PMID: 19485524 [PubMed - indexed for MEDLINE] PMCID: PMC2736568 Free PMC Article
http://www.ncbi.nlm.nih.gov/pubmed/19485524