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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 44, Iss. 20 — Jul. 10, 2005
  • pp: 4394–4397

Variable optical attenuator with a polymer-stabilized dual-frequency liquid crystal

Yung-Hsun Wu, Xiao Liang, Yan-Qing Lu, Fang Du, Yi-Hsin Lin, and Shin-Tson Wu  »View Author Affiliations


Applied Optics, Vol. 44, Issue 20, pp. 4394-4397 (2005)
http://dx.doi.org/10.1364/AO.44.004394


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Abstract

A transmission-type variable optical attenuator (VOA) based on a polymer-stabilized dual-frequency liquid crystal (PSDFLC) is demonstrated at lambda=1.55 µm. The VOA is highly transparent in the voltage-off state but scatters light in the voltage-on state. By using a birefringent beam displacer incorporated with half-wave plates, we can obtain a VOA that is polarization independent and that exhibits a 31 dB dynamic range. The polymer networks and dual-frequency effect together reduce the response time (rise + decay) of a 16 µm PSDFLC cell to 30 ms at room temperature and at a voltage of 24 V_rms.

© 2005 Optical Society of America

OCIS Codes
(160.5470) Materials : Polymers
(230.3720) Optical devices : Liquid-crystal devices

Citation
Yung-Hsun Wu, Xiao Liang, Yan-Qing Lu, Fang Du, Yi-Hsin Lin, and Shin-Tson Wu, "Variable optical attenuator with a polymer-stabilized dual-frequency liquid crystal," Appl. Opt. 44, 4394-4397 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-20-4394

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