Comparison of laser beams quality criteria

Eugeny Perevezentsev; Anatoly Poteomkin; Efim Khazanov

doi:10.1117/12.644632

23 February 2006 Comparison of laser beam quality criteria

Eugeny Perevezentsev, Anatoly Poteomkin, Efim Khazanov

Proceedings Volume 6101, Laser Beam Control and Applications; 610119 (2006) https://doi.org/10.1117/12.644632
Event: Lasers and Applications in Science and Engineering, 2006, San Jose, California, United States

Abstract

Nowadays the power of lasers with diffraction beam quality is on significant rise. But it is not easy to achieve ideal quality because of severe undesired distortions. Under different forms of distortion the beam shows different behavior. With any form of distortions there is the need to qualitatively characterize the beam quality. Three various qualitative criteria are most commonly used for this purpose, each of them describing the beam with one ratio: overlapping integral, Strehl ratio, and M² parameter. All these criteria are well-known and frequently used in the literature, though the problem of their interrelation has never been discussed. In this paper we have analyzed the above mentioned criteria and have researched their interrelations in three most common types of beam quality degradation: thermal lens, electronic self-focusing, and spherical aberration. Approximate analytical expressions for all three criteria and three types of beam distortion are derived for Gaussian and super-Gaussian intensity shapes. The efficiency of characterizing those beams by various criteria is discussed.

Citation Download Citation

Eugeny Perevezentsev, Anatoly Poteomkin, and Efim Khazanov "Comparison of laser beam quality criteria", Proc. SPIE 6101, Laser Beam Control and Applications, 610119 (23 February 2006); https://doi.org/10.1117/12.644632

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