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

Kelly Cristina Jorge; Rudimar Riva; Nicolau Andre Silveira Rodrigues; Marcelo G. Destro

doi:10.1117/12.699028

14 February 2007 Real-time measurement of laser beam quality factor (M²) by imaging transverse scattered light

Kelly Cristina Jorge, Rudimar Riva, Nicolau Andre Silveira Rodrigues, Marcelo G. Destro

Proceedings Volume 6452, Laser Resonators and Beam Control IX; 645215 (2007) https://doi.org/10.1117/12.699028
Event: Lasers and Applications in Science and Engineering, 2007, San Jose, California, United States

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.

Citation Download Citation

Kelly Cristina Jorge, Rudimar Riva, Nicolau Andre Silveira Rodrigues, and Marcelo G. Destro "Real-time measurement of laser beam quality factor (M²) by imaging transverse scattered light", Proc. SPIE 6452, Laser Resonators and Beam Control IX, 645215 (14 February 2007); https://doi.org/10.1117/12.699028

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