Free Electron Laser In The Visible. Generation Of Coherent Emission In The Short Wavelength Range

1985 ◽  
Author(s):  
M. Billardon
Keyword(s):  
Wavelength Range ◽  
Free Electron ◽  
Free Electron Laser ◽  
Short Wavelength ◽  
Short Wavelength Range ◽  
Coherent Emission

scholarly journals Conductors, semiconductors, and insulators irradiated with short-wavelength free-electron laser

2007 ◽  
Vol 101 (4) ◽  
pp. 043107 ◽  
Author(s):  
J. Krzywinski ◽  
R Sobierajski ◽  
M. Jurek ◽  
R. Nietubyc ◽  
J. B. Pelka ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Short Wavelength

scholarly journals Short-wavelength free-electron laser sources and science: a review

2017 ◽  
Vol 80 (11) ◽  
pp. 115901 ◽  
Author(s):  
E A Seddon ◽  
J A Clarke ◽  
D J Dunning ◽  
C Masciovecchio ◽  
C J Milne ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Short Wavelength ◽  
Laser Sources

scholarly journals Coronal mass ejections and high-speed solar wind streams effect on HF ionospheric communication channel

2021 ◽  
Vol 2131 (5) ◽  
pp. 052096
Author(s):  
F I Vybornov ◽  
O A Sheiner
Keyword(s):  
Solar Wind ◽  
Wavelength Range ◽  
Coronal Mass Ejections ◽  
Short Wavelength ◽  
High Speed ◽  
Communication Channel ◽  
Critical Frequency ◽  
Short Wavelength Range ◽  
Speed Solar Wind ◽  
High Speed Solar Wind

Abstract This article analyzes the degree of solar coronal mass ejections and high-speed solar wind streams influence on the ionospheric communication channel in the short-wavelength range. Regularities in the coronal mass ejections influence on the parameters of the ionosphere are revealed. It is shown that there is a decrease in the values of the used differential parameter of critical frequency of the ionosphere F2 layer after the onset of coronal mass ejections of the loop type, while no significant changes are observed from other types of coronal mass ejections. The contribution of the high-speed solar wind flux to the features of the behavior of ionospheric parameters is demonstrated. Deviations of critical frequency and maximum observed frequency of the ionosphere F2 layer indicate a change in conditions in the ionosphere, leading to disruption of radio communication in the short-wavelength range. The results of ground-based measurements of the ionospheric plasma parameters were obtained by the methods of oblique and vertical sounding of the ionosphere. The use of the method of oblique sounding made it possible to obtain data on the state of the ionosphere where there are no vertical sounding stations.

scholarly journals Systematic study of a corrugated waveguide as a microwave undulator

2019 ◽  
Vol 26 (1) ◽  
pp. 11-17 ◽  
Author(s):  
Liang Zhang ◽  
Wenlong He ◽  
Jim Clarke ◽  
Kevin Ronald ◽  
Alan D. R. Phelps ◽  
...  
Keyword(s):  
Systematic Study ◽  
Free Electron ◽  
Free Electron Laser ◽  
Short Wavelength ◽  
Free Electron Lasers ◽  
Corrugated Waveguide ◽  
X Ray ◽  
Fast Estimation

Microwave undulators have great potential to be used in short-wavelength free-electron lasers. In this paper, the properties of a corrugated waveguide and its performance as an undulator cavity for a UK X-ray free-electron laser were systematically studied. The equations presented in this paper allow a fast estimation of the dimensions of the corrugated waveguide. An undulator cavity operating at 36 GHz designed for the HE11 and HE12 modes was investigated and the performance of both modes compared.

SiC multilayer add/drop filter for optical interconnects

2013 ◽  
Vol 1559 ◽  
Author(s):  
M. Vieira ◽  
M. A Vieira ◽  
P. Louro ◽  
V. Silva ◽  
J. Costa
Keyword(s):  
Wavelength Range ◽  
Short Wavelength ◽  
Optical Interconnects ◽  
Selective Removal ◽  
Wavelength Division Multiplexer ◽  
Short Wavelength Range ◽  
Wavelength Division ◽  
Channel Bandwidth ◽  
Opposite Behavior ◽  
Optical Gates

ABSTRACTIn this paper we demonstrate an add/drop filter based on SiC technology. Tailoring of the channel bandwidth and wavelength is experimentally demonstrated. The concept is extended to implement a 1 by 4 wavelength division multiplexer in the visible range.The add/drop filter consists of a p-i'(a-SiC:H)-n/p-i(a-Si:H)-n photodetector with two front and back optical gates. Tailoring the filter wavelength is achieved by applying a 400 nm background and changing front and back biased optical gates. Results show that, front background enhances the light-to-dark sensitivity of the long and medium wavelength channels and quench strongly the others. Back violet background has the opposite behavior; it enhances channel magnitude in short wavelength range and reduces it in the long ones. This nonlinearity provides the possibility for selective removal or addition of wavelengths. An optoeletronic model gives insight on the system physics and explains the light filtering properties of the add/drop filter.

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