Title

Circularly polarized high-efficiency cholesteric liquid crystal lasers with a tunable nematic phase retarder

Authors

Authors

H. Shirvani-Mahdavi; E. Mohajerani;S. T. Wu

Comments

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Abbreviated Journal Title

Opt. Express

Keywords

EMISSION; REFLECTOR; EDGE; BAND; Optics

Abstract

A high efficiency dye-doped cholesteric liquid crystal (CLC) is demonstrated by optimizing the dye concentration and using an electrically tunable nematic liquid crystal (NLC) phase retarder. The state of polarization of laser emission in CLC lasers, contrary to our expectations, due to the refractive index mismatch at the boundaries is not exactly circular. A double-cell structure including a CLC laser and an adjustable NLC phase retarder with a mirror reflector on one of the inner surfaces not only purifies the polarization state of the laser output but also improves the laser efficiency by 6.7X, over the single-direction dye-doped CLC laser. (C) 2010 Optical Society of America

Journal Title

Optics Express

Volume

18

Issue/Number

5

Publication Date

1-1-2010

Document Type

Article

Language

English

First Page

5021

Last Page

5027

WOS Identifier

WOS:000275454100092

ISSN

1094-4087

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