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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 16 — Jul. 30, 2012
  • pp: 17843–17855

LCoS nematic SLM characterization and modeling for diffraction efficiency optimization, zero and ghost orders suppression

Emiliano Ronzitti, Marc Guillon, Vincent de Sars, and Valentina Emiliani  »View Author Affiliations


Optics Express, Vol. 20, Issue 16, pp. 17843-17855 (2012)
http://dx.doi.org/10.1364/OE.20.017843


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Abstract

Pixilated spatial light modulators are efficient devices to shape the wavefront of a laser beam or to perform Fourier optical filtering. When conjugated with the back focal plane of a microscope objective, they allow an efficient redistribution of laser light energy. These intensity patterns are usually polluted by undesired spots so-called ghosts and zero-orders whose intensities depend on displayed patterns. In this work, we propose a model to account for these discrepancies and demonstrate the possibility to efficiently reduce the intensity of the zero-order up to 95%, the intensity of the ghost up to 96% and increase diffraction efficiency up to 44%. Our model suggests physical cross-talk between pixels and thus, filtering of addressed high spatial frequencies. The method implementation relies on simple preliminary characterization of the SLM and can be computed a priori with any phase profile. The performance of this method is demonstrated employing a Hamamatsu LCoS SLM X10468-02 with two-photon excitation of fluorescent Rhodamine layers.

© 2012 OSA

OCIS Codes
(050.1970) Diffraction and gratings : Diffractive optics
(090.1760) Holography : Computer holography
(230.3720) Optical devices : Liquid-crystal devices
(230.6120) Optical devices : Spatial light modulators

ToC Category:
Optical Devices

History
Original Manuscript: May 24, 2012
Revised Manuscript: June 29, 2012
Manuscript Accepted: June 29, 2012
Published: July 20, 2012

Citation
Emiliano Ronzitti, Marc Guillon, Vincent de Sars, and Valentina Emiliani, "LCoS nematic SLM characterization and modeling for diffraction efficiency optimization, zero and ghost orders suppression," Opt. Express 20, 17843-17855 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-16-17843


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