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

A. Márquez; F. J. Martínez-Guardiola; J. Francés; M. G. Ramírez; E. M. Calzado; M. Morales-Vidal; S. Gallego; I. Pascual

doi:10.1117/12.2530290

6 September 2019 Blazed grating theory to minimize the non-idealities in LCoS devices

A. Márquez, F. J. Martínez-Guardiola, J. Francés, M. G. Ramírez, E. M. Calzado, M. Morales-Vidal, S. Gallego, I. Pascual

Author Affiliations +

Proceedings Volume 11136, Optics and Photonics for Information Processing XIII; 1113613 (2019) https://doi.org/10.1117/12.2530290
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

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.

Citation Download Citation

A. Márquez, F. J. Martínez-Guardiola, J. Francés, M. G. Ramírez, E. M. Calzado, M. Morales-Vidal, S. Gallego, and I. Pascual "Blazed grating theory to minimize the non-idealities in LCoS devices", Proc. SPIE 11136, Optics and Photonics for Information Processing XIII, 1113613 (6 September 2019); https://doi.org/10.1117/12.2530290

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