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9 March 2020 Generation of vortex beams using holographic phase masks in photo-thermo-refractive glass (Conference Presentation)
Oussama Mhibik, Zachary Labossiere, Ivan Divliansky, Leonid Glebov
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Proceedings Volume 11266, Laser Resonators, Microresonators, and Beam Control XXII; 112660Y (2020) https://doi.org/10.1117/12.2544387
Event: SPIE LASE, 2020, San Francisco, California, United States
Abstract
We present a high-power capable, simple, tunable, and robust vortex beam generator. Initial phase profiles are generated using a Spatial Light Modulator and then holographically encoded into a Transmitting Volume Bragg Grating (TBG) resulting in fabrication of a Holographic Phase Mask (HPM). Such HPMs could be used for mode conversion (e.g. Gaussian to vortex) at high power due to low absorption and low nonlinear refractive index of photo-thermo-refractive glass. Unlike monochromatic conventional phase mask, adjustment of an incidence angle on the HPM results in conservation of the phase information incurred into the beam making HPM tunable.
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Oussama Mhibik, Zachary Labossiere, Ivan Divliansky, and Leonid Glebov "Generation of vortex beams using holographic phase masks in photo-thermo-refractive glass (Conference Presentation)", Proc. SPIE 11266, Laser Resonators, Microresonators, and Beam Control XXII, 112660Y (9 March 2020); https://doi.org/10.1117/12.2544387
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KEYWORDS
Spiral phase plates
Holography
Glasses
Spatial light modulators
Beam shaping
High power lasers
High power microwaves
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