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Proceedings Paper

Compact holographic optical interconnections using nematic liquid crystal spatial light modulators
Author(s): T. Lu; B. Robertson; N. Collings
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Paper Abstract

In a fibre-optic communication network, the wavelength-division multiplexing (WDM) technique enables an expansion of the data-carrying capacity of optical fibres. This can be achieved by transmitting different channels on a single optical fibre, with each channel modulating a different wavelength. In order to access and manipulate these channels at a node of the network, a compact holographic optical switch is designed, modelled, and constructed. The structure of such a switch consists of a series of optical components which are used to collimate the beam from the input, de-multiplex each individual wavelength into separated channels, manipulate the separated channels, and reshape the beam to the output. A spatial light modulator (SLM) is crucial in this system, offering control and flexibility at the channel manipulation stage, and providing the ability to redirect light into the desired output fibre. This is achieved by the use of a 2-D analogue phase computer generated hologram (CGH) based on liquid crystal on silicon (LCOS) technology.

Paper Details

Date Published: 21 September 2011
PDF: 7 pages
Proc. SPIE 8167, Optical Design and Engineering IV, 81671F (21 September 2011); doi: 10.1117/12.895161
Show Author Affiliations
T. Lu, Univ. of Cambridge (United Kingdom)
B. Robertson, Univ. of Cambridge (United Kingdom)
N. Collings, Univ. of Cambridge (United Kingdom)

Published in SPIE Proceedings Vol. 8167:
Optical Design and Engineering IV
Jean-Luc M. Tissot; Laurent Mazuray; Rolf Wartmann; Jeffrey M. Raynor; Andrew Wood, Editor(s)

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