CUED Publications database

The silicon backplane design for an LCOS polarization-insensitive phase hologram SLM

Moore, JR and Collings, N and Crossland, WA and Davey, AB and Evans, M and Jeziorska, AM and Komarčević, M and Parker, RJ and Wilkinson, TD and Xu, H (2008) The silicon backplane design for an LCOS polarization-insensitive phase hologram SLM. IEEE Photonics Technology Letters, 20. pp. 60-62. ISSN 1041-1135

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Abstract

Polarization-insensitivity is achieved in a reflective spatial light modulator by laying a quarter-wave plate (QWP) at the incident wavelength directly over the mirror pixels of a silicon backplane, and forming a nematle Fréedrickcz cell over the QWP to modulate the reflected phase. To achieve the highest drive voltage from the available silicon process, a switched voltage common front electrode design is described, with variable amplitude square wave drive to the pixels to maintain constant root-mean-square drive and minimize phase fluctuations during the dc balance refresh cycle. The silicon has been fabricated and liquid-crystal-on-silicon cells both with and without the QWP assembled; applications include optically transparent switches for optical networks, beam steering for add-drop multiplexers for wavelength-division- multiplexing telecommunications, television multicast, and holographic projection.

Item Type: Article
Uncontrolled Keywords: Add-drop multiplexers Beam steering Holographic optical components Liquid-crystal-on-silicon (LCOS) devices Multicast Phase hologram Polarization-insensitive Quarter-wave plate (QWP) Spatial light modulators (SLMS)
Subjects: UNSPECIFIED
Divisions: Div B > Photonics
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 12:00
Last Modified: 08 Dec 2014 02:23
DOI: 10.1109/LPT.2007.912690