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Optical Engineering

Widely tunable optical filter with variable bandwidth based on spatially distributed cholesteric liquid crystal
Author(s): Yuhua Huang; Qing Sun; Shichao Zhang
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Paper Abstract

A widely tunable optical filter was designed and demonstrated by configuring two spatially distributed cholesteric liquid crystals (LCs) in a reflection mode, in which the incident light was first reflected by one cholesteric LC and then by the other. The spatially distributed cholesteric LCs were fabricated by injecting four cholesteric LC mixtures with different chiral concentration into the same LC cell one by one, in which the spectral position of the reflection band is spatially changed from blue to red color from one side to the other side. Using this method, a tunable optical filter with the ability of tuning the central wavelength from ∼480 to ∼613  nm and FWHM from ∼10 to ∼80  nm was successfully demonstrated.

Paper Details

Date Published: 8 April 2013
PDF: 6 pages
Opt. Eng. 52(4) 044003 doi: 10.1117/1.OE.52.4.044003
Published in: Optical Engineering Volume 52, Issue 4
Show Author Affiliations
Yuhua Huang, Zhejiang Normal Univ. (China)
Qing Sun, Zhejiang Normal Univ. (China)
Shichao Zhang, Zhejiang Normal Univ. (China)

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