Variable beam shaping with using the same field mapping refractive beam shaper

Alexander Laskin; Vadim Laskin

doi:10.1117/12.903606

6 February 2012 Variable beam shaping with using the same field mapping refractive beam shaper

Alexander Laskin, Vadim Laskin

Proceedings Volume 8236, Laser Resonators, Microresonators, and Beam Control XIV; 82360D (2012) https://doi.org/10.1117/12.903606
Event: SPIE LASE, 2012, San Francisco, California, United States

Abstract

Modern laser scientific techniques and industrial technologies require not only simple homogenizing of a beam but also more freedom in manipulation of intensity profile and generating such profiles like super-Gaussian, inverse-Gaussian, skewed flattop and others. In many cases the task of variable beam shaping can be solved by refractive beam shaping optics of field mapping type which operational principle presumes saving of beam consistency, providing collimated output beam of low divergence, high transmittance and flatness of output beam profile, extended depth of field; another important feature is negligible residual wave aberration. Typically the fields mapping refractive beam shapers, like πShaper, are designed to generate flattop intensity profile for a beam of pre-determined size and input intensity profile. Varying of the input beam diameter lets it possible to realize either super-Gaussian (smaller input) or inverse-Gaussian (bigger input) intensity profiles of output beam that are important in pumping of solid-state lasers, hardening, cladding and other techniques. By lateral shift of a beam with respect to a πShaper the output flattop profile gets a skew in direction of that shift, the skew angle corresponds to the shift value. The skewed profile is important, for example, in some acousto-optical techniques where compensation of acoustic wave attenuation is required. All variety of profiles can be provided by the same beam shaper unit. This paper will describe some design basics of refractive beam shapers of the field mapping type and techniques to vary the output intensity profile, experimental results will be presented as well.

Citation Download Citation

Alexander Laskin and Vadim Laskin "Variable beam shaping with using the same field mapping refractive beam shaper", Proc. SPIE 8236, Laser Resonators, Microresonators, and Beam Control XIV, 82360D (6 February 2012); https://doi.org/10.1117/12.903606

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