Mueller matrix-based optimization of reflective type twisted nematic liquid crystal SLM at oblique incidences

Verma, R. S. ; Swami, M. K. ; Manhas, S. S. ; Gupta, P. K. (2010) Mueller matrix-based optimization of reflective type twisted nematic liquid crystal SLM at oblique incidences Optics Communications, 283 (12). pp. 2580-2587. ISSN 0030-4018

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S00304...

Related URL: http://dx.doi.org/10.1016/j.optcom.2010.02.032

Abstract

Mueller matrix measurements were used to characterize the polarization properties of liquid crystal-based reflective type twisted nematic (TN) special light modulator (SLM) at oblique incidence of the laser beam. The experimentally obtained Mueller matrices were used to obtain the combination of polarization optics required to optimize it for phase only modulation. The results indicate that minimum intensity modulation is obtained with the use of a polarizer followed by a quarter wave plate (QWP) in polarization state generator (PSG) arm and a QWP followed by an analyzer in polarization state analyzer arm (PSA). Polarization parameters such as retardance, rotation and depolarization were calculated from the experimentally obtained Mueller matrices using polar decomposition method at different angle of incidences of the laser beam and the results has been discussed. The similarity between retardance and depolarization curve as a function of address voltage of TNSLM indicated that depolarization is mainly associated with errors in retardance values. Further, spectral Mueller matrix measurements were used to obtain intensity modulation response in the range of wavelengths 450-700 nm for broadband applications.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Spatial Light Modulators; Mueller Matrix; Phase Modulation; Holographic Optical Tweezers
ID Code:22203
Deposited On:23 Nov 2010 08:18
Last Modified:02 Jun 2011 06:35

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