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Proceedings Paper

Steering accuracy of a spatial light modulator-based single beam steerer: guidelines and limitations
Author(s): David Engström; Jörgen Bengtsson; Emma Eriksson; Mattias Goksör
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Paper Abstract

The positioning accuracy when a phase-only one dimensional spatial light modulator (SLM) is used for beam steering is limited by the number of pixels and their quantized phase modulation. Optimizing the setting of the SLM pixels individually can lead to the inaccuracy being a significant fraction of the diffraction limited spot size. This anomalous behaviour was simulated numerically, and experiments showed the same phenomena with very good agreement. However, by including an extra degree of freedom in the optimization of the SLM setting, we show that the accuracy can be improved by a factor proportional to the number of pixels in the SLM.

Paper Details

Date Published: 29 August 2008
PDF: 8 pages
Proc. SPIE 7038, Optical Trapping and Optical Micromanipulation V, 703829 (29 August 2008); doi: 10.1117/12.798133
Show Author Affiliations
David Engström, Univ. of Gothenburg (Sweden)
Jörgen Bengtsson, Chalmers Univ. of Technology (Sweden)
Emma Eriksson, Univ. of Gothenburg (Sweden)
Mattias Goksör, Univ. of Gothenburg (Sweden)

Published in SPIE Proceedings Vol. 7038:
Optical Trapping and Optical Micromanipulation V
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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