Reversible photo-induced long-period fiber gratings in photonic liquid crystal fibers

A novel light-controllable long-period fiber grating (LPFG) is demonstrated by making use of a PCF infiltrated with a photoresponsive liquid crystal (LC) mixture consisting of nematic LC molecules and light-sensitive 4-methoxyazobenzene (4MAB). With the aid of the photo-induced isomerization of 4MAB...

Full description

Saved in:
Bibliographic Details
Published in:Optics express 2011-03, Vol.19 (7), p.6756-6761
Main Authors: Liou, Jia-hong, Chang, Tin-hao, Lin, Ta, Yu, Chin-ping
Format: Article
Language:English
Subjects:
Equipment Design
Equipment Failure Analysis
Fiber Optic Technology - instrumentation
Liquid Crystals - chemistry
Liquid Crystals - radiation effects
Photons
Refractometry - instrumentation
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A novel light-controllable long-period fiber grating (LPFG) is demonstrated by making use of a PCF infiltrated with a photoresponsive liquid crystal (LC) mixture consisting of nematic LC molecules and light-sensitive 4-methoxyazobenzene (4MAB). With the aid of the photo-induced isomerization of 4MAB, the refractive index of the LC mixture can be modulated and the periodic index perturbation along the fiber can be achieved by exposing the PCF to a blue laser through a mask. The resonance wavelength and dip depth of the LPFG can be controlled by using different blue-laser irradiation time, numbers of period, and 4MAB concentrations. In addition, the photo-induced LPFG is erasable under green-laser illumination.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.19.006756