1 March 2003 Intensity variations using a quantized spatial light modulator for nonmechanical beam steering
Author Affiliations +
Optical Engineering, 42(3), (2003). doi:10.1117/1.1543175
Abstract
A liquid-crystal spatial light modulator (SLM) can be used to alter the phase of the wavefront to achieve a deflection or a change in the shape of a laser beam. Ideal blazed gratings have perfect diffraction efficiency, and all the light is deflected. Encoded onto a pixelated spatial light modulator, however, the spatial limitations and phase quantization result in a stepped, nonideal blazed grating and decreased diffraction efficiency. The far-field intensity distribution was measured for different deflection angles using 4 and 32 phase levels. The result has been analyzed and used to construct a simple model of the studied SLM. Simulations of the far field based on this model show good agreement with the experimental results.
Emil J. Haellstig, Lars Sjoeqvist, Mikael Lindgren, "Intensity variations using a quantized spatial light modulator for nonmechanical beam steering," Optical Engineering 42(3), (1 March 2003). https://doi.org/10.1117/1.1543175
JOURNAL ARTICLE
7 PAGES


SHARE
Back to Top