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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 8 — Apr. 11, 2011
  • pp: 7106–7111

Experimental demonstration of Generalized Phase Contrast based Gaussian beam-shaper

Sandeep Tauro, Andrew Bañas, Darwin Palima, and Jesper Glückstad  »View Author Affiliations

Optics Express, Vol. 19, Issue 8, pp. 7106-7111 (2011)

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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.

© 2011 OSA

OCIS Codes
(070.6110) Fourier optics and signal processing : Spatial filtering
(100.1390) Image processing : Binary phase-only filters
(140.3300) Lasers and laser optics : Laser beam shaping
(070.6120) Fourier optics and signal processing : Spatial light modulators

ToC Category:
Lasers and Laser Optics

Original Manuscript: February 4, 2011
Revised Manuscript: March 18, 2011
Manuscript Accepted: March 21, 2011
Published: March 29, 2011

Sandeep Tauro, Andrew Bañas, Darwin Palima, and Jesper Glückstad, "Experimental demonstration of Generalized Phase Contrast based Gaussian beam-shaper," Opt. Express 19, 7106-7111 (2011)

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