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Proceedings Paper

Blazed grating theory to minimize the non-idealities in LCoS devices
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Paper Abstract

Parallel-aligned liquid crystal on silicon (PA-LCoS) microdisplays are widely used in spatial light modulation applications, especially in those requiring phase-only modulation. One such application area is programmable diffractive optics which plays a very important role in modern optical imaging systems or in optical interconnections for optical telecommunications. Among the multilevel diffractive optical elements (DOEs) we focus on the important case of the blazed gratings. We develop the corresponding analytical expressions for the diffracted field where, as one of the novelties in the work, an analytical expression including the fill factor and the flicker is obtained. This enables to have a model against to compare the experimental results in a number of situations where fill factor, flicker, period, and number of quantization levels are the variables. This also enables to design appropriate compensation techniques to enhance the performance of the blazed gratings.

Paper Details

Date Published: 6 September 2019
PDF: 7 pages
Proc. SPIE 11136, Optics and Photonics for Information Processing XIII, 1113613 (6 September 2019); doi: 10.1117/12.2530290
Show Author Affiliations
A. Márquez, Univ. de Alicante (Spain)
F. J. Martínez-Guardiola, Univ. de Alicante (Spain)
J. Francés, Univ. de Alicante (Spain)
M. G. Ramírez, Univ. de Alicante (Spain)
E. M. Calzado, Univ. de Alicante (Spain)
M. Morales-Vidal, Univ. de Alicante (Spain)
S. Gallego, Univ. de Alicante (Spain)
I. Pascual, Univ. de Alicante (Spain)

Published in SPIE Proceedings Vol. 11136:
Optics and Photonics for Information Processing XIII
Khan M. Iftekharuddin; Abdul A. S. Awwal; Victor H. Diaz-Ramirez; Andrés Márquez, Editor(s)

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