Polarization-Independent Variable Optical Attenuator Employing Dye-Doped (Polymer/Liquid-Crystal) Composite Film for 1.5-μm Optical Fiber Communication

2012 ◽  
Author(s):  
Seiji Fukushima ◽  
Koki Yoshinaga ◽  
Tomohiro Hachino ◽  
Yasutaka Igarashi ◽  
Shinji Noguchi ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Composite Film ◽  
Optical Fiber Communication ◽  
Fiber Communication ◽  
Variable Optical Attenuator ◽  
Independent Variable ◽  
Doped Polymer ◽  
Crystal Composite ◽  
Polymer Liquid Crystal ◽  
Polarization Independent

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

Crystals ◽  
2015 ◽  
Vol 5 (1) ◽  
pp. 163-171
Author(s):  
Seiji Fukushima ◽  
Kazuhiro Ariki ◽  
Koki Yoshinaga ◽  
Hiroki Higuchi ◽  
Hirotsugu Kikuchi
Keyword(s):  
Liquid Crystal ◽  
Composite Film ◽  
Polymer Liquid ◽  
Doped Polymer ◽  
Infrared Extinction ◽  
Crystal Composite ◽  
Polymer Liquid Crystal

Phase-Separation Behavior and Electro-Optical Properties for (Polymer/Liquid Crystal) Composite Films

1996 ◽  
Vol 425 ◽  
Author(s):  
Hirotsugu Kikuchi ◽  
Hwan-Kyeong Jeong ◽  
Tisato Kajiyama
Keyword(s):  
Optical Properties ◽  
Liquid Crystal ◽  
Phase Separation ◽  
Composite Film ◽  
Polymer Network ◽  
Composite Films ◽  
Phase Separation Behavior ◽  
Separation Behavior ◽  
Crystal Composite ◽  
Polymer Liquid Crystal

AbstractDominant factors that control the aggregation structure and electro-optical properties were presented for (polymer/liquid crystal) composite films prepared by a solvent cast method from homogeneous solutions. Phase-separation behavior of the composite films consisting of a three dimensional polymer network and low molecular weight liquid crystals (LCs) embedded in the network was studied by evaluating the development of optical heterogeneity in the casting solution during film formation and by observing the morphology of the polymer networks. It was confirmed from light scattering studies of the casting solution during solvent evaporation that the phase-separated structure of polymer and LC was formed through spinodal decomposition. The resultant size of the LC domain in the composite film was controlled by regulating the solvent evaporation rate. The morphology of the polymer network in the composite film was also strongly influenced by the solubility between the polymer and the casting solvent. The electro-optical properties based on field controlled light scattering of the composite film were strongly dependent on the size of the LC domain. Though the rise response time decreased, the decay response time increased with an increase in the size of LC domains in the composite film. When poly(diisopropyl fumarate), which is not compatible with the LC, was used as the matrix polymer, no electro-optical hysteresis was observed, while considerable electro-optical hysteresis was observed for the composite film consisting of poly(methyl methacrylate), which shows a certain compatibility with the LC.

scholarly journals Dielectric analysis of (polymer)/(Liquid Crystal) composite film based on aggregation structure.

1990 ◽  
pp. 434-436
Author(s):  
Hirotsugu KIKUCHI ◽  
Akira MIYAMOTO ◽  
Satoshi KOBAYASHI ◽  
Yasuhiro MORIMURA ◽  
Tisato KAIIYAMA
Keyword(s):  
Liquid Crystal ◽  
Composite Film ◽  
Dielectric Analysis ◽  
Polymer Liquid ◽  
Aggregation Structure ◽  
Crystal Composite ◽  
Polymer Liquid Crystal
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