Experimental demonstration of Generalized Phase Contrast based Gaussian beam-shaper

Sandeep Tauro; Andrew Rafael Bañas; Darwin Palima; Jesper Glückstad

doi:10.1364/OE.19.007106

Experimental demonstration of Generalized Phase Contrast based Gaussian beam-shaper

Sandeep Tauro
, Andrew Rafael Bañas
, Darwin Palima
, Jesper Glückstad

Research output: Contribution to journal › Journal article › Research › peer-review

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Abstract

We report the first experimental demonstration of Gaussian beam-shaping based on the Generalized Phase Contrast (GPC) approach. We show that, when using a dynamic spatial light modulator (SLM), this approach can rapidly generate arbitrarily shaped beams. Moreover, we demonstrate that low-cost binary-phase optics fabricated using photolithography and chemical etching techniques can replace the SLM in static and high power beam shaping applications. The design parameters for the binary-phase elements of the module are chosen according to the results of our previously conducted analysis and numerical demonstrations [Opt. Express 15, 11971 (2007)]. Beams with a variety of cross-sections such as circular, rectangular and square, with near flat-top intensity distributions are demonstrated. GPC-based beam shaping is inherently speckle-free and the shaped beams maintain a flat output phase. The non-absorbing components used in this beam-shaping approach have a high-damage-threshold and are thus ideally suited for high power applications.

Original language	English
Journal	Optics Express
Volume	19
Issue number	8
Pages (from-to)	7106-7111
ISSN	1094-4087
DOIs	https://doi.org/10.1364/OE.19.007106
Publication status	Published - 2011

Bibliographical note

This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/abstract.cfm?uri=oe-19-8-7106. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

Keywords

Laser beam shaping
Binary phase-only filters
Spatial filtering
Spatial light modulators

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http://www.opticsinfobase.org/abstract.cfm?uri=oe-19-8-7106

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@article{3908217bbe1247b182815a95751d8937,

title = "Experimental demonstration of Generalized Phase Contrast based Gaussian beam-shaper",

abstract = "We report the first experimental demonstration of Gaussian beam-shaping based on the Generalized Phase Contrast (GPC) approach. We show that, when using a dynamic spatial light modulator (SLM), this approach can rapidly generate arbitrarily shaped beams. Moreover, we demonstrate that low-cost binary-phase optics fabricated using photolithography and chemical etching techniques can replace the SLM in static and high power beam shaping applications. The design parameters for the binary-phase elements of the module are chosen according to the results of our previously conducted analysis and numerical demonstrations [Opt. Express 15, 11971 (2007)]. Beams with a variety of cross-sections such as circular, rectangular and square, with near flat-top intensity distributions are demonstrated. GPC-based beam shaping is inherently speckle-free and the shaped beams maintain a flat output phase. The non-absorbing components used in this beam-shaping approach have a high-damage-threshold and are thus ideally suited for high power applications.",

keywords = "Laser beam shaping, Binary phase-only filters, Spatial filtering, Spatial light modulators",

author = "Sandeep Tauro and Ba{\~n}as, \{Andrew Rafael\} and Darwin Palima and Jesper Gl{\"u}ckstad",

note = "This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/abstract.cfm?uri=oe-19-8-7106. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.",

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doi = "10.1364/OE.19.007106",

language = "English",

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AU - Tauro, Sandeep

AU - Bañas, Andrew Rafael

AU - Palima, Darwin

AU - Glückstad, Jesper

N1 - This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/abstract.cfm?uri=oe-19-8-7106. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

PY - 2011

Y1 - 2011

N2 - We report the first experimental demonstration of Gaussian beam-shaping based on the Generalized Phase Contrast (GPC) approach. We show that, when using a dynamic spatial light modulator (SLM), this approach can rapidly generate arbitrarily shaped beams. Moreover, we demonstrate that low-cost binary-phase optics fabricated using photolithography and chemical etching techniques can replace the SLM in static and high power beam shaping applications. The design parameters for the binary-phase elements of the module are chosen according to the results of our previously conducted analysis and numerical demonstrations [Opt. Express 15, 11971 (2007)]. Beams with a variety of cross-sections such as circular, rectangular and square, with near flat-top intensity distributions are demonstrated. GPC-based beam shaping is inherently speckle-free and the shaped beams maintain a flat output phase. The non-absorbing components used in this beam-shaping approach have a high-damage-threshold and are thus ideally suited for high power applications.

AB - We report the first experimental demonstration of Gaussian beam-shaping based on the Generalized Phase Contrast (GPC) approach. We show that, when using a dynamic spatial light modulator (SLM), this approach can rapidly generate arbitrarily shaped beams. Moreover, we demonstrate that low-cost binary-phase optics fabricated using photolithography and chemical etching techniques can replace the SLM in static and high power beam shaping applications. The design parameters for the binary-phase elements of the module are chosen according to the results of our previously conducted analysis and numerical demonstrations [Opt. Express 15, 11971 (2007)]. Beams with a variety of cross-sections such as circular, rectangular and square, with near flat-top intensity distributions are demonstrated. GPC-based beam shaping is inherently speckle-free and the shaped beams maintain a flat output phase. The non-absorbing components used in this beam-shaping approach have a high-damage-threshold and are thus ideally suited for high power applications.

KW - Laser beam shaping

KW - Binary phase-only filters

KW - Spatial filtering

KW - Spatial light modulators

U2 - 10.1364/OE.19.007106

DO - 10.1364/OE.19.007106

M3 - Journal article

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EP - 7111

JO - Optics Express

JF - Optics Express

IS - 8

ER -

Experimental demonstration of Generalized Phase Contrast based Gaussian beam-shaper

Abstract

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Keywords

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