High-efficiency pin photo-diodes with a spot-size converter for 40 Gb/s transmission systems

2002 ◽  
Author(s):  
N. Yasuoka ◽  
M. Makiuchi ◽  
M. Miyata ◽  
O. Aoki ◽  
M. Ekawa ◽  
...  
Keyword(s):  
High Efficiency ◽  
Spot Size ◽  
Transmission Systems

Theoretical Study on the Influence of Transmission Parameters on the Transmission Performance of Magnetic Resonance Wireless Power Transmission Systems

2014 ◽  
Vol 926-930 ◽  
pp. 434-439
Author(s):  
Chang Sheng Li ◽  
Juan Cao ◽  
He Zhang
Keyword(s):  
Magnetic Resonance ◽  
High Efficiency ◽  
Power Transmission ◽  
Maximum Efficiency ◽  
System Quality ◽  
Wireless Power ◽  
Transmission Performance ◽  
Wireless Power Transmission ◽  
Transmission Systems ◽  
Transmission Parameters

Magnetic resonance wireless power transmission technology is based on the phenomenon of resonant coupling to realize non-contact power transmission via near magnetic field. Based on the mutual coupling model of resonance system, the influence laws of system transmission parameters, such as coil coupling coefficients, load resistance, etc., on the transmission performance are theoretically studied in this paper. The research results shows that the power high-efficiency and high-quality transmission does not depend on the large coil loop coupling coefficient and the working frequencies of maximum power and maximum efficiency transmission do not coincide at most condition. Transmission systems with a high resonance frequency can produce high power and efficiency transmission over short distances. In addition, by increasing the coil diameter or wire diameter can improve the system quality factor, and optimize the energy transmission performance.

scholarly journals High efficiency dielectric photonic crystal fiber metalens

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Myunghwan Kim ◽  
Soeun Kim
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Optical Fibers ◽  
High Efficiency ◽  
Focal Length ◽  
Spot Size ◽  
Diffraction Limit ◽  
Crystal Fiber ◽  
The Core ◽  
Light Manipulation

AbstractOptical fibers have been utilized in various fields owing to their superior guiding performance. However, the modification of optical properties and light manipulation in fibers are restricted by the limitation of the core and cladding materials. In addition, the spot size of the light is constrained by the diffraction limit. In this study, we propose an all-dielectric metalens patterned on the facet of a photonic crystal fiber. The metasurface, which contains Si pillars, satisfies the required phase diagram for focusing light with high transmission. The proposed metalens has a focal length of 30 µm and achieves an outstanding efficiency of up to 88% at a wavelength of 1.55 µm, which is approximately 5 times higher than that of a metal-based metalens. We believe that this scheme may pave the way for in-fiber metasurface applications.

Experimental Research on the Influence of Transmission Parameters on the Transmission Performance of Magnetic Resonance Wireless Power Transmission Systems

2014 ◽  
Vol 551 ◽  
pp. 393-398
Author(s):  
Chang Sheng Li ◽  
He Zhang ◽  
Xiao Hua Jiang
Keyword(s):  
Magnetic Resonance ◽  
Power Efficiency ◽  
High Efficiency ◽  
Power Transmission ◽  
Transmission Power ◽  
Wireless Power ◽  
Transmission Performance ◽  
Wireless Power Transmission ◽  
Transmission Systems ◽  
Transmission Parameters

Magnetic resonance wireless power transmission uses resonance strong coupling between the transmission and receiving terminals to realize a non-contact efficient supply of energy over large distance. The transmission power, efficiency and distance are confirmed by comprehensive function of the transmission parameters. By taking experimental means, the influence laws of loop transmission parameters, such as separation between coils, coil size, etc., on the transmission performance are studied in this paper. The experimental results show that the power high-efficiency and high-quality transmission does not depend on the large coil loop coupling coefficient and transmission power and efficiency may increase firstly and then decline as the separation between coils increases. The transmission performance can be optimized by increasing the coils diameter or wire diameter, and moreover, transmission systems with a high resonance frequency can produce high power and efficiency transmission over short distances.

High-efficiency AlGaAs-based laser diode at 808 nm with large transverse spot size

1996 ◽  
Vol 8 (10) ◽  
pp. 1291-1293 ◽  
Author(s):  
M.A. Emanuel ◽  
N.W. Carlson ◽  
J.A. Skidmore
Keyword(s):  
Laser Diode ◽  
High Efficiency ◽  
Spot Size
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