Title

Variable optical attenuator based on polymer stabilized twisted nematic liquid crystal

Authors

Authors

Y. Q. Lu; F. Du; Y. H. Lin;S. T. Wu

Comments

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Abbreviated Journal Title

Opt. Express

Keywords

LIGHT MODULATORS; SCATTERING; Optics

Abstract

A variable optical attenuator (VOA) based on polymer stabilized twisted nematic (PSTN) liquid crystal (LC) is demonstrated. Comparing with the normal twisted nematic LC-based VOA, PSTN exhibits a much faster response time. Moreover, the polymer networks effectively eliminate the backflow effect which exists in the normal TNLC cell. The attenuation mechanism of the PSTN LC was studied. Both polarization rotation and light scattering effects are found to contribute to the optical attenuation. The ratio between these two mechanisms can be adjusted by changing the polymer concentration and polymer network domain size. (C) 2004 Optical Society of America.

Journal Title

Optics Express

Volume

12

Issue/Number

7

Publication Date

1-1-2004

Document Type

Article

Language

English

First Page

1221

Last Page

1227

WOS Identifier

WOS:000220640900005

ISSN

1094-4087

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