Novel passive polymer waveguides integrated with electro-optically active ferroelectric liquid crystals

Citation
Ds. Hermann et al., Novel passive polymer waveguides integrated with electro-optically active ferroelectric liquid crystals, OPT ENG, 40(10), 2001, pp. 2188-2198
Citations number
20
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Optics & Acoustics
Journal title
OPTICAL ENGINEERING
ISSN journal
0091-3286 → ACNP
Volume
40
Issue
10
Year of publication
2001
Pages
2188 - 2198
Database
ISI
SICI code
0091-3286(200110)40:10<2188:NPPWIW>2.0.ZU;2-Q
Abstract
We report the preparation and characterization of novel isotropic polymer s lab waveguides made by photochemical crosslinking, and their integration wi th a ferroelectric liquid crystal in an integrated electro-optic modulator. The refractive index of the passive copolymer material in the device was c ontrolled by the copolymer composition, and good agreement between measured and calculated effective indices for the guided modes of polymer films was obtained. The active ferroelectric liquid crystal exhibited a refractive i ndex change of Deltan approximate to0.10 upon application of an ac voltage of +/- 30 V, giving an electro-optic modulation of the input TE0-mode with a contrast ratio of 11:1 and only a small polarization conversion into TM o utput light. (C) 2001 Society of Photo-Optical Instrumentation Engineers.