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

Yung Hsun Wu*, Xiao Liang, Yan Qing Lu, Fang Du, Yi-Hsin Lin, Shin Tson Wu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

A transmission-type variable optical attenuator (VOA) based on a polymer-stabilized dual-frequency liquid crystal (PSDFLC) is demonstrated at λ = 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 Vrms.

Original languageEnglish
Pages (from-to)4394-4397
Number of pages4
JournalApplied Optics
Volume44
Issue number20
DOIs
StatePublished - 10 Jul 2005

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