High power, high gain optical fibre amplifier for multiwavelength transmission systems

1994 ◽  
Vol 30 (17) ◽  
pp. 1411-1413 ◽  
Author(s):  
M. Semenkoff ◽  
Y. Sorel ◽  
J.F. Kerdiles ◽  
M. Guibert
Keyword(s):  
Optical Fibre ◽  
High Power ◽  
High Gain ◽  
Transmission Systems ◽  
Fibre Amplifier

High power Er-Yb linear optical fibre amplifier for CATV applications with gain tilt window over 11 nm and integrated dispersion pre-compensation

1996 ◽  
Vol 32 (10) ◽  
pp. 913 ◽  
Author(s):  
N. Park ◽  
T. Nielsen ◽  
J. Simpson ◽  
P. Wysocki ◽  
R. Pedrazzani ◽  
...  
Keyword(s):  
Optical Fibre ◽  
High Power ◽  
Fibre Amplifier ◽  
Linear Optical

Efficient, high power, high gain, Er3+ doped silica fibre amplifier

1990 ◽  
Vol 26 (14) ◽  
pp. 1038 ◽  
Author(s):  
J.F. Massicott ◽  
R. Wyatt ◽  
B.J. Ainslie ◽  
S.P. Craig-Ryan
Keyword(s):  
High Power ◽  
High Gain ◽  
Fibre Amplifier ◽  
Silica Fibre

scholarly journals Interleaved, Switched Inductor and High-Gain Wide Bandgap Based Boost Converter Proposal

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 800
Author(s):  
David Marroqui ◽  
Ausias Garrigós ◽  
Cristian Torres ◽  
Carlos Orts ◽  
Jose M. Blanes ◽  
...  
Keyword(s):  
Power Density ◽  
High Power ◽  
Low Voltage ◽  
High Gain ◽  
Wide Bandgap ◽  
High Power Density ◽  
Boost Converters ◽  
Proposal A ◽  
Current Ripples ◽  
Current Ripple

Many applications (electric vehicles, renewable energies, low-voltage DC grids) require simple, high-power density and low-current ripple-boost converters. Traditional step-up converters are limited when large transformation ratios are involved. In this work is proposed a step-up converter that brings together the characteristics of high gain, low ripple, and high-power density. From the converter proposal, a mathematical analysis of its operation is first performed, including its static transfer function, stress of components, and voltage and current ripples. Furthermore, it provides a design example for an application of Vin = 48 V to Vo = 270 V and 500 W. For its implementation, two different wide bandgap (WBG) semiconductor models have been used, hybrid GaN cascodes and SiC MOSFETs. Finally, the experimental results of the produced prototypes are shown, and the results are discussed.

High gain limiting erbium-doped fibre amplifier with over 30 dB dynamic range

1991 ◽  
Vol 27 (3) ◽  
pp. 211 ◽  
Author(s):  
W.I. Way ◽  
D. Chen ◽  
M.A. Saifi ◽  
M.J. Andrejco ◽  
A. Yi-Yan ◽  
...  
Keyword(s):  
Dynamic Range ◽  
High Gain ◽  
Fibre Amplifier ◽  
Erbium Doped

scholarly journals A comparative analysis of cascaded-multilevel hybrid filters applied in power transmission systems

2008 ◽  
Vol 19 (1) ◽  
pp. 107-113 ◽  
Author(s):  
Alexandre G. Merçon ◽  
Lucas F. Encarnação ◽  
Luís F. C. Monteiro ◽  
Emanuel L. van Emmerik ◽  
Maurício Aredes
Keyword(s):  
Comparative Analysis ◽  
High Power ◽  
Power Transmission ◽  
High Harmonic ◽  
Active Filter ◽  
Active Filters ◽  
Transmission Systems ◽  
Passive Filters ◽  
Power Transmission Systems ◽  
Hybrid Filters

Passive filters, commonly used to attenuate non-characteristic harmonics in High Voltage Direct Current (HVDC) systems, stay at risk of disconnection from the system due to overcurrent problems. A possible solution to solve the problems involving high harmonic levels would be the use of pure active filters. However, this alternative is unpractical due to the high power of the transmission systems. This paper proposes two different topologies of hybrid filters to damp harmonic resonance in power transmission systems. The first one combines a small-rated active filter in series with passive filters, limiting overcurrents, when existent, or improving its own quality factor. The second one consists of an active filter in parallel with passive filters, which compensates all eventual overcurrent in the system bus. Both topologies utilizes the state of the art in very high power semiconductors and multilevel power converters. Simulation results present a comparative analysis, highlighting the efficiency of, and the differences between, the two proposed hybrid filters.

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