Results 141 to 150 of about 57,281 (193)

High Birefringence Photonic Crystal Fibers

Materials Science Forum, 2010
Photonic crystal fiber (PCFs) offer new possibilities of realizing highly birefringence fibers due to a higher intrinsic index contrast compared to conventional fibers. Here, based on general section structure of PCFs, we take some mend in the core configuration, and achieve highly birefringence effect.
Shu Qin Guo, Min Ge, Pan Zhuang, Li Ping Chang   +3 more
openaire   +1 more source

High birefringence liquid crystalline materials

2008 IEEE/LEOS Winter Topical Meeting Series, 2008
In this paper, nematic liquid crystalline materials and its mesogenic and physicochemical properties (mainly birefringence, dielectric anisotropy, and viscosity) will be discussed. The influence of number and position of fluorosubstitution on the ability of nematic phase formation in broad temperature range and on the value and sign of dielectric ...
R. Dabrowski, S. Gauza, J. Dziaduszek, P. Kula, S. Urban, S. T. Wu   +5 more
openaire   +2 more sources

PCF with low dispersion and high birefringence

2015 International Conference on Electrical, Electronics, Signals, Communication and Optimization (EESCO), 2015
Photonic Crystal Fibers (PCFs) structure with unique arrangement of circular air holes has been investigated. The structure has circular air holes of different areas and those air holes are arranged in a unique fashion. Both TE and TM mode has shown zero dispersion. A very low loss and high birefringence was observed for the structure.
Pranaw Kumar, Ruplata Kumari, Nayak, Satya Sourav, Swarup Mund   +3 more
openaire   +1 more source

Embedded multicore hollow fiber with high birefringence

Applied Optics, 2011
We fabricate and demonstrate a hollow fiber with multiple embedded cores (MCHF) based on a modified "suspended core-in-tube" preform technique. Its birefringence properties are controlled by the MCHF core's ovality, which could be controlled by the applied pressure and drawing temperature in the MCHF preform.
Fengjun, Tian, Libo, Yuan, Qiang, Dai, Zhihai, Liu   +3 more
openaire   +2 more sources

Halogen Bond Unlocks Ultra‐High Birefringence

Angewandte Chemie International Edition
AbstractAnisotropy is crucial for birefringence (Δn) in optical materials, but optimizing it remains a formidable challenge (Δn >0.3). Supramolecular frameworks incorporating π‐conjugated components are promising for achieving enhanced birefringence because of their structural diversity and inherent anisotropy. Herein, we first synthesized (C6H6NO2)+
Jin Chen, Miao‐Bin Xu, Huai‐Yu Wu, Jun‐Yan Wu, Ke‐Zhao Du   +4 more
openaire   +2 more sources

Influence of the fiber diameter on the stress birefringence in high-birefringence fibers

Optics Letters, 1983
The influence of the outer diameter of the constraining region on the stress-induced birefringence in high-birefringence fibers is investigated for three fiber structures. Generally, the outer diameter should be three times larger than the mean diameter of the stress-producing regions to ensure that the birefringence is close to maximum.
S C, Rashleigh, M J, Marrone
openaire   +2 more sources

Light-emitting high birefringence chlorinated bistolanes

Journal of Molecular Liquids, 2021
Abstract Eight both symmetrical and non-symmetrical bistolanes with terminal alkyl-, alkoxy- and alkysulphanyl- chain and lateral chlorine atom have been synthesized via Sonogashira cross-coupling and their mesomorphic, optical and photoluminescence properties have been studied.
Dorota Węgłowska, Przemysław Kula
openaire   +1 more source

High birefringent fibers for stress detection

SPIE Proceedings, 2003
Initial results of study a lateral stress, static and dynamic, on a light propagation in a high birefringent fiber are presented. A permanent birefringence in optical fiber arises due to large thermal stress in the core. Ambient parameters like temperature and hydrostatic pressure influence the stress anisotropy and thus the light propagation.
Marcin Roszko, Andrzej W. Domanski, Tomasz R. Wolinski, Marek W. Sierakowski, Piotr Lesiak   +4 more
openaire   +1 more source

Nematic liquid crystals exhibiting high birefringence

Optical Review, 2016
Two fluorinated isothiocyanato nematic liquid crystalline compounds, 4′-butylcyclohexyl-3, 5-difluoro-4-isothiocyanatobiphenyl and 4′-pentylcyclohexyl-3, 5-difluoro-4-isothiocynatobiphenyl are studied in detail to obtain their different physical parameters. Optical polarizing microscopy, differential scanning calorimetry, density and dielectric studies
Kiranmala Thingujam, Ayon Bhattacharjee, Basana Choudhury, Roman Dabrowski   +3 more
openaire   +1 more source

Ultra-high birefringence elliptical cladding polarization-maintaining fiber with superimposed geometric birefringence

Optik, 2021
Abstract In this paper, an ultra-high birefringence thin-diameter elliptical cladding polarization-maintaining fiber (PMF) with an elliptical core is designed based on employing both geometric and stress birefringence. The influence of core and stress rods parameters on the modal birefringence of the fiber under different superposition methods are ...
Haoyu Li, Xuyou Li, Jie Wang, Dan Xu
openaire   +1 more source