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Steering accuracy of a spatial light modulator-based single beam steerer: guidelines and limitations

David Engström ; Jörgen Bengtsson (Institutionen för mikroteknologi och nanovetenskap, Fotonik) ; Emma Eriksson ; Mattias Goksör
SPIE Proceedings (0277-786X). Vol. 7038 (2008), p. 703829 (8 pp.).
[Konferensbidrag, refereegranskat]

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.

Nyckelord: beam steering, optical modulation, phase modulation, spatial light modulators



Denna post skapades 2010-03-02. Senast ändrad 2011-01-20.
CPL Pubid: 116945

 

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Institutioner (Chalmers)

Institutionen för fysik (GU) (GU)
Institutionen för mikroteknologi och nanovetenskap, Fotonik

Ämnesområden

Optik
Optisk fysik

Chalmers infrastruktur