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Proceedings Paper

Optoelectronic router based on a liquid crystal waveguide
Author(s): Giuseppe Coppola; Luigi Sirleto; Giovanni Breglio; Antonello Cutolo
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Paper Abstract

A novel configuration for an optoelectronic integrated router based on a waveguide with a liquid crystal over- layer, working at the wavelength of 1.55 micron, is theoretically discussed for the first time. The device is based on the mode-mixing principle together with the electro-optic effect of a smectic A* liquid crystal. The device is composed by a single mode input optical channel waveguide, a bimodal active region, with a liquid crystal over-layer as cover, and an output Y branch to separate the two output channels. The active region is designed to allow a (pi) shift between the two modes that it supports, by means the variation of the effective refractive index of guided modes due to molecular reorientation of liquid crystals indued by an electrical field. By doing so it is possible to steer light from one output channel to the other one. Exhaustive detail about the design both of the input waveguide and of the active region has been given together with the description of the optical behavior of our device. Numerical simulations have shown how this kind of router exhibits satisfactory performances.

Paper Details

Date Published: 15 May 2001
PDF: 8 pages
Proc. SPIE 4277, Integrated Optics Devices V, (15 May 2001); doi: 10.1117/12.426812
Show Author Affiliations
Giuseppe Coppola, Univ. degli Studi di Napoli Federico II (Italy)
Luigi Sirleto, Univ. degli Studi di Napoli Federico II (Italy)
Giovanni Breglio, Univ. degli Studi di Napoli Federico II (Italy)
Antonello Cutolo, Univ. del Sannio (Italy)

Published in SPIE Proceedings Vol. 4277:
Integrated Optics Devices V
Giancarlo C. Righini; Seppo Honkanen, Editor(s)

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