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Phys. Rev. E 65, 036505 (2002) [5 pages]

Experimental observation of short-pulse upshifted frequency microwaves from a laser-created overdense plasma

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Noboru Yugami1,*, Toshihiko Niiyama2, Takeshi Higashiguchi3,†, Hong Gao1, Shigeo Sasaki1, Hiroaki Ito1,‡, and Yasushi Nishida1,§
1Department of Energy and Environmental Science, Graduate School of Utsunomiya University, 7-1-2 Yoto, Utsunomiya, Tochigi 321-8585, Japan
2Ishikawajima-Harima Heavy Industries Company, Limited, Tokyo 100-0005, Japan
3Department of Electrical and Electronic Engineering, Miyazaki University Gakuen Kibanadai Nishi 1-1, Miyazaki 889-2192, Japan

Received 30 July 2001; published 5 March 2002

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.

© 2002 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevE.65.036505
DOI:
10.1103/PhysRevE.65.036505
PACS:
52.59.Ye, 52.25.Os, 52.50.Jm

*Email address: yugami@cc.utsunomiya-u.ac.jp

†Email address: higashi@opt.miyazaki-u.ac.jp

‡Email address: hito@cc.utsunomiya-u.ac.jp

§Email address: nishiday@cc.utsunomiya-u.ac.jp

 
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