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Proceedings Paper

High-energy laser plasma diagnostic system
Author(s): Mingjun M. Zhao; Tin M. Aye; Norbert Fruehauf; Gajendra D. Savant; Daniel A. Erwin; Brayton E. Smoot; Richard W. Loose
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Paper Abstract

This paper describes the development of a non-contact diagnosis system for analyzing the plasma density profile, temperature profile, and ionic species of a high energy laser-generated plasma. The system was developed by Physical Optics Corporation in cooperation with the U.S. Army Space and Missile Defense Command, High Energy Laser Systems Test Facility at White Sands Missile Range, New Mexico. The non- contact diagnostic system consists of three subsystems: an optical fiber-based interferometer, a plasma spectrometer, and a genetic algorithm-based fringe-image processor. In the interferometer subsystem, the transmitter and the receiver are each packaged as a compact module. A narrow notch filter rejects strong plasma light, passing only the laser probing beam, which carries the plasma density information. The plasma spectrum signal is collected by an optical fiber head, which is connected to a compact spectrometer. Real- time genetic algorithm-based data processing/display permits instantaneous analysis of the plasma characteristics. The research effort included design and fabrication of a vacuum chamber, and high-energy laser plasma generation. Compactness, real-time operation, and ease of use make the laser plasma diagnosis system well suited for dual use applications such as diagnosis of electric arc and other industrial plasmas.

Paper Details

Date Published: 21 July 2000
PDF: 10 pages
Proc. SPIE 4034, Laser Weapons Technology, (21 July 2000); doi: 10.1117/12.391860
Show Author Affiliations
Mingjun M. Zhao, Physical Optics Corp. (United States)
Tin M. Aye, Physical Optics Corp. (United States)
Norbert Fruehauf, Physical Optics Corp. (Germany)
Gajendra D. Savant, Physical Optics Corp. (United States)
Daniel A. Erwin, Univ. of Southern California (United States)
Brayton E. Smoot, White Sands Missile Range (United States)
Richard W. Loose, White Sands Missile Range (United States)

Published in SPIE Proceedings Vol. 4034:
Laser Weapons Technology
Todd D. Steiner; Paul H. Merritt, Editor(s)

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