Radio-frequency spectroscopy of the active fiber heating under condition of high-power lasing generation

2015 ◽  
Vol 40 (9) ◽  
pp. 1972 ◽  
Author(s):  
O. A. Ryabushkin ◽  
R. I. Shaidullin ◽  
I. A. Zaytsev
Keyword(s):  
Radio Frequency ◽  
High Power ◽  
Active Fiber ◽  
Radio Frequency Spectroscopy

scholarly journals Hardware Design of a High Dynamic Range Radio Frequency (RF) Harmonic Measurement System

Instruments ◽  
2018 ◽  
Vol 2 (3) ◽  
pp. 16 ◽  
Author(s):  
Ram Narayanan ◽  
Kyle Gallagher ◽  
Gregory Mazzaro ◽  
Anthony Martone ◽  
Kelly Sherbondy
Keyword(s):  
Radio Frequency ◽  
Measurement System ◽  
High Power ◽  
Nonlinear Distortion ◽  
Dynamic Range ◽  
Low Level ◽  
Rf Systems ◽  
Nonlinear Distortions ◽  
Circuit Elements ◽  
Rf Circuit

Radio frequency (RF) circuit elements that are traditionally considered to be linear frequently exhibit nonlinear properties that affect the intended operation of many other RF systems. Devices such as RF connectors, antennas, attenuators, resistors, and dissimilar metal junctions generate nonlinear distortion that degrades primary RF system performance. The communications industry is greatly affected by these unintended and unexpected nonlinear distortions. The high transmit power and tight channel spacing of the communication channel makes communications very susceptible to nonlinear distortion. To minimize nonlinear distortion in RF systems, specialized circuits are required to measure the low level nonlinear distortions created from traditionally linear devices, i.e., connectors, cables, antennas, etc. Measuring the low-level nonlinear distortion is a difficult problem. The measurement system requires the use of high power probe signals and the capability to measure very weak nonlinear distortions. Measuring the weak nonlinear distortion becomes increasingly difficult in the presence of higher power probe signals, as the high power probe signal generates distortion products in the measurement system. This paper describes a circuit design architecture that achieves 175 dB of dynamic range which can be used to measure low level harmonic distortion from various passive RF circuit elements.

Radio-frequency spectroscopy of weakly bound molecules in ultracold Fermi gas

2014 ◽  
Vol 23 (1) ◽  
pp. 013402 ◽  
Author(s):  
Liang-Hui Huang ◽  
Peng-Jun Wang ◽  
Zheng-Kun Fu ◽  
Jing Zhang
Keyword(s):  
Radio Frequency ◽  
Fermi Gas ◽  
Ultracold Fermi Gas ◽  
Weakly Bound ◽  
Radio Frequency Spectroscopy

Novel high-power radio-frequency sources for mobile ionospheric heating

2016 ◽  
Author(s):  
Brian L. Beaudoin ◽  
Jayakrishnan A. Karakkad ◽  
Charles Turner ◽  
Amith H. Narayan ◽  
Connor Thompson ◽  
...  
Keyword(s):  
Radio Frequency ◽  
High Power ◽  
Ionospheric Heating

The High-Power (3-MW) Long-Pulse (3-s) Radio-Frequency System for Ion Cyclotron Resonance Heating Experiments on TEXTOR

1987 ◽  
Vol 12 (3) ◽  
pp. 449-475 ◽  
Author(s):  
G. Van Oost ◽  
V. P. Bhatnagar ◽  
T. Delvigne ◽  
P. Descamps ◽  
F. Durodié ◽  
...  
Keyword(s):  
Radio Frequency ◽  
High Power ◽  
Cyclotron Resonance ◽  
Ion Cyclotron Resonance ◽  
Ion Cyclotron ◽  
Long Pulse

Radio-Frequency Heating of GaAs and SiC Photoconductive Switch for High-Power Applications

2006 ◽  
Vol 34 (5) ◽  
pp. 1697-1701 ◽  
Author(s):  
R. Gunda ◽  
D.S. Gleason ◽  
K. Kelkar ◽  
P. Kirawanich ◽  
W.C. Nunnally ◽  
...  
Keyword(s):  
Radio Frequency ◽  
High Power ◽  
Radio Frequency Heating ◽  
Photoconductive Switch ◽  
Frequency Heating
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