Experimental observation of short-pulse upshifted frequency microwaves from a laser-created overdense plasma.
A short and frequency upshifted from a source microwave pulse is experimentally generated by the overdense plasma that is rapidly created by a laser. The source wave, whose frequency is 9 GHz, is propagating in the waveguide filled with tetrakis-dimethyl-amino-ethylene gas, which is to be converted to the overdense plasma by the laser. The detected frequency of the pulse is over 31.4 GHz and its duration is 10 ns. This technique has the potential for the generation of a tunable frequency source.
Yugami
Noboru
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Department of Energy and Environmental Science, Graduate School of Utsunomiya University, 7-1-2 Yoto, Utsunomiya, Tochigi 321-8585, Japan. yugami@cc.utsunomiya-u.ac.jp
Niiyama
Toshihiko
T
Higashiguchi
Takeshi
T
Gao
Hong
H
Sasaki
Shigeo
S
Ito
Hiroaki
H
Nishida
Yasushi
Y