Results 261 to 270 of about 21,925,565 (312)
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High birefringent fibers for stress detection
SPIE Proceedings, 2003Initial 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 +4 more
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Highly Birefringence‐Guided Microfiber Resonator for Ultra‐High Repetition Rate Ultrashort Pulse
Laser & Photonics ReviewsIn the past, most of the introduced ultrafast pulse lasers have primarily focused on shortening cavity lengths or employing harmonic mode‐locking methods to achieve megahertz and gigahertz coherent pulses.
Xiwei Huang +6 more
semanticscholar +1 more source
, 2020
One unique kind of porous-core photonic crystal fiber (PCF) is proposed with elliptical air-holes in core, and round-corner hexagonal air-holes in cladding, for efficiently transmitting polarization-maintaining terahertz waves. Dispersion, birefringence,
Yani Zhang, Lu Xue, Dun Qiao, Z. Guang
semanticscholar +1 more source
One unique kind of porous-core photonic crystal fiber (PCF) is proposed with elliptical air-holes in core, and round-corner hexagonal air-holes in cladding, for efficiently transmitting polarization-maintaining terahertz waves. Dispersion, birefringence,
Yani Zhang, Lu Xue, Dun Qiao, Z. Guang
semanticscholar +1 more source
Nematic liquid crystals exhibiting high birefringence
Optical Review, 2016Two 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 +3 more
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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
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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
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High birefringence photopolymerizable phenylacetylene liquid crystals
Liquid Crystals, 2001Photopolymerizable three-ring phenylacetylene (3PA) liquid crystalline compounds were synthesized and the physical properties of the monomers and polymers were characterized in the expectation of obtaining high birefringence polymers. 3PA monomers containing acrylate substituents exhibited enantiotropic nematic phases and high δn values of around 0.35.
Chizu Sekine +3 more
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Liquid crystalline materials with high birefringence
Journal of Optical Technology, 2005The mesogenic, optical, and dielectric properties of the new mixtures of high-birefringence nematic liquid crystals based on isothiocyanatotolanes are investigated, and examples of multicomponent mixtures with low viscosity and optical anisotropy Delta n approximately 0.4 are presented.
A. Spadlo +6 more
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Journal of Lightwave Technology, 2019
We proposed a novel photonic crystal fiber composed of a double-cladding square lattice that could be used in dual-band, Er and Tm optical gain bands, simultaneously supporting a large negative dispersion and a high birefringence.
Yong Soo Lee +4 more
semanticscholar +1 more source
We proposed a novel photonic crystal fiber composed of a double-cladding square lattice that could be used in dual-band, Er and Tm optical gain bands, simultaneously supporting a large negative dispersion and a high birefringence.
Yong Soo Lee +4 more
semanticscholar +1 more source
High birefringence photonic crystal fiber design
SPIE Proceedings, 2009A novel high birefringence photonic crystal fiber (PCF) was proposed, which consists of hexagonal inner ring and octagonal outer ring. A full vector finite element was applied to investigate the mode birefringence and chromatic dispersion. It has been demonstrated from the calculated results that high birefringence to the order of 0.001 can be ...
Feifei Shi +3 more
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Dynamic birefringence of several high polymers
Journal of Polymer Science Part C: Polymer Symposia, 1964AbstractThe complex strain‐optical coefficient, complex stress‐optical coefficient, complex modulus of elasticity and the corresponding loss tangent of phase angles between the stress, strain and birefringence have been measured for several high polymers in the frequency range from 0.001 to 10 cycles/sec.
R. Yamada +3 more
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