Photonic crystals as optical fibers-properties and applications

2000 ◽  
Author(s):  
J. C. Knight ◽  
T. A. Birks ◽  
B. J. Mangan ◽  
W. J. Wadsworth ◽  
P. St. J. Russell
Keyword(s):  
Photonic Crystals ◽  
Optical Fibers

Using photonic crystals as optical fibers

2002 ◽  
Author(s):  
J.C. Knight ◽  
T.A. Birks ◽  
B.J. Mangan ◽  
P.St.J. Russell
Keyword(s):  
Photonic Crystals ◽  
Optical Fibers

Emission spectra of silver-infiltrated opal photonic crystals under excitation through optical fibers

2009 ◽  
Vol 45 (7) ◽  
pp. 785-790 ◽  
Author(s):  
V. S. Gorelik ◽  
L. I. Zlobina ◽  
O. A. Troitskii ◽  
R. I. Chanieva
Keyword(s):  
Photonic Crystals ◽  
Optical Fibers ◽  
Emission Spectra

Colloidal photonic crystals assembled on the cladding of optical fibers

2011 ◽  
Author(s):  
W. H. Guo ◽  
M. Wang ◽  
W. Xia ◽  
L. H. Dai
Keyword(s):  
Photonic Crystals ◽  
Optical Fibers ◽  
Colloidal Photonic Crystals

scholarly journals Vortex index identification and unidirectional propagation in Kagome photonic crystals

Nanophotonics ◽  
2019 ◽  
Vol 8 (5) ◽  
pp. 833-840 ◽  
Author(s):  
Wei-Min Deng ◽  
Xiao-Dong Chen ◽  
Wen-Jie Chen ◽  
Fu-Li Zhao ◽  
Jian-Wen Dong
Keyword(s):  
Photonic Crystals ◽  
Optical Fibers ◽  
Electromagnetic Waves ◽  
Selection Rule ◽  
Fourier Spectrum ◽  
External Source ◽  
Higher Order ◽  
Edge States ◽  
Mode Identification ◽  
Vortex Field

AbstractVortex field in photonic metamaterials has been revealed in recent years, which provides an extra degree of freedom to control the behavior of electromagnetic waves, such as the unidirectional propagation in topological metamaterials and orbital angular momentum multiplexing in optical fibers. Achieving topologically protected unidirectionality needs an external source either with a vortex index of m = ±1 (i.e. 2πm phase winding around phase singularity) or with a spin index of ±1 (i.e. right- or left-handed circular polarization). However, it is still an open question on the relationship between higher-order (|m | > 1) vortex field and topological metamaterials. Here, we study the excitation of valley bulk states by a source with a higher-order vortex index in Kagome photonic crystals. The selection rule for the excitation of valley bulk states is derived and can be applied to predict the selective excitation of valley bulk states by a source with a higher-order vortex index. Interestingly, we find that the Fourier spectrum and the averaged Fourier spectrum of the Ez component enable us to identify the vortex index of the source. Besides, it is shown that the unidirectional edge states can be excited by a source with a vortex index of 1 or 2 in a straight or 120° detour waveguide. Our work paves the way for the demonstration of the selection rule and may have potential applications in optical mode identification.

Elusive photonic crystals come a step closer

Nature ◽  
2020 ◽  
Vol 585 (7826) ◽  
pp. 506-507
Author(s):  
John C. Crocker
Keyword(s):  
Photonic Crystals

Photonic crystals: Labelled spheres

Nature China ◽  
2008 ◽  
Author(s):  
Vicki Cleave
Keyword(s):  
Photonic Crystals

High efficiency GaN-based LEDs: light extraction by photonic crystals

2006 ◽  
Vol 31 (6) ◽  
pp. 1-235 ◽  
Author(s):  
A. David
Keyword(s):  
Photonic Crystals ◽  
High Efficiency ◽  
Light Extraction

High-voltage monitoring by the fiber-optic recirculating measuring system

2020 ◽  
pp. 38-44
Author(s):  
A. V. Polyakov ◽  
M. A. Ksenofontov
Keyword(s):  
Optical Fibers ◽  
High Voltage ◽  
Optical Sensors ◽  
Electromagnetic Interference ◽  
Fiber Optic ◽  
Electric Power Industry ◽  
Measuring System ◽  
Voltage Range ◽  
External Electromagnetic Fields ◽  
Optic Communication

Optical technologies for measuring electrical quantities attract great attention due to their unique properties and significant advantages over other technologies used in high-voltage electric power industry: the use of optical fibers ensures high stability of measuring equipment to electromagnetic interference and galvanic isolation of high-voltage sensors; external electromagnetic fields do not influence the data transmitted from optical sensors via fiber-optic communication lines; problems associated with ground loops are eliminated, there are no side electromagnetic radiation and crosstalk between the channels. The structure and operation principle of a quasi-distributed fiber-optic high-voltage monitoring system is presented. The sensitive element is a combination of a piezo-ceramic tube with an optical fiber wound around it. The device uses reverse transverse piezoelectric effect. The measurement principle is based on recording the change in the recirculation frequency under the applied voltage influence. When the measuring sections are arranged in ascending order of the measured effective voltages relative to the receiving-transmitting unit, a relative resolution of 0,3–0,45 % is achieved for the PZT-5H and 0,8–1,2 % for the PZT-4 in the voltage range 20–150 kV.

POF — Polymer Optical Fibers for Data Communication

2002 ◽  
Author(s):  
Werner Daum ◽  
Jürgen Krauser ◽  
Peter E. Zamzow ◽  
Olaf Ziemann
Keyword(s):  
Optical Fibers ◽  
Data Communication ◽  
Polymer Optical Fibers
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