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Proceedings Paper

Real-time measurement of laser beam quality factor (M²) by imaging transverse scattered light
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Paper Abstract

It is presented a new method that allows real-time measurement of the laser beam quality from a single lateral image of a beam propagating in a scattering medium. The development of this method involved studies of an adequate scattering medium and the design of an image acquisition optical system. Comparing with traditional methods, this new method is faster and less exhaustive, providing multiple beam diameters measurements with the same (or even better) accuracy from a unique image in real time. For a single mode HeNe laser beam, it was obtained the value M2 = 1.1 ± 0.1.

Paper Details

Date Published: 14 February 2007
PDF: 10 pages
Proc. SPIE 6452, Laser Resonators and Beam Control IX, 645215 (14 February 2007); doi: 10.1117/12.699028
Show Author Affiliations
Kelly Cristina Jorge, Instituto Tecnológico de Aeronáutica (Brazil)
Rudimar Riva, Instituto de Estudos Avançados (Brazil)
Nicolau Andre Silveira Rodrigues, Instituto de Estudos Avançados (Brazil)
Marcelo G. Destro, Instituto de Estudos Avançados (Brazil)

Published in SPIE Proceedings Vol. 6452:
Laser Resonators and Beam Control IX
Alexis V. Kudryashov; Alan H. Paxton; Vladimir S. Ilchenko, Editor(s)

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