Intensity variations using a quantized spatial light modulator for nonmechanical beam steering

Emil J. Haellstig; Lars Sjoeqvist; Mikael Lindgren

doi:10.1117/1.1543175

1 March 2003 Intensity variations using a quantized spatial light modulator for nonmechanical beam steering

Emil J. Haellstig, Lars Sjoeqvist, Mikael Lindgren

Optical Engineering, Vol. 42, Issue 3, (March 2003). https://doi.org/10.1117/1.1543175

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.

©(2003) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Emil J. Haellstig, Lars Sjoeqvist, and 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

Published: 1 March 2003

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