Infrared Extinction of a Dye-Doped (Polymer/Liquid Crystal) Composite Film

被引：1

作者：

Fukushima, Seiji ^{[1
]}

Ariki, Kazuhiro ^{[1
]}

Yoshinaga, Koki ^{[1
]}

Higuchi, Hiroki ^{[2
]}

Kikuchi, Hirotsugu ^{[2
]}

机构：

[1] Kagoshima Univ, Grad Sch Sci & Engn, Kagoshima 8900065, Japan

[2] Kyushu Univ, Inst Mat Chem & Engn, Kasuga, Fukuoka 8168580, Japan

来源：

CRYSTALS | 2015年 / 5卷 / 01期

关键词：

liquid crystal; variable optical attenuator; dichroic dye; light scattering; composite film; VARIABLE OPTICAL ATTENUATOR;

D O I：

10.3390/cryst5010163

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Infrared extinction of a dye-doped (polymer/liquid crystal) composite film was investigated. It is found that doping a metal-complex dye into the liquid crystal extended the operation wavelength to an optical fiber communication wavelength of about 1.5 mu m. An aperture placed behind the composite film greatly improves an extinction ratio, which suggests the film functions on the basis of light scattering. Some experimental results agree to Rayleigh scattering. The film exhibits the high extinction ratio of 51 or 17.1 dB and a low polarization dependent loss of 7.6% or 0.32 dB and, then, it could be applied to a telecommunication device such as a variable optical attenuator.

引用

页码：163 / 171

页数：9

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