High-energy laser plasma diagnostic system

Mingjun M. Zhao; Tin M. Aye; Norbert Fruehauf; Gajendra D. Savant; Daniel A. Erwin; Brayton E. Smoot; Richard W. Loose

doi:10.1117/12.391860

21 July 2000 High-energy laser plasma diagnostic system

Mingjun M. Zhao, Tin M. Aye, Norbert Fruehauf, Gajendra D. Savant, Daniel A. Erwin, Brayton E. Smoot, Richard W. Loose

Proceedings Volume 4034, Laser Weapons Technology; (2000) https://doi.org/10.1117/12.391860
Event: AeroSense 2000, 2000, Orlando, FL, United States

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.

Citation Download Citation

Mingjun M. Zhao, Tin M. Aye, Norbert Fruehauf, Gajendra D. Savant, Daniel A. Erwin, Brayton E. Smoot, and Richard W. Loose "High-energy laser plasma diagnostic system", Proc. SPIE 4034, Laser Weapons Technology, (21 July 2000); https://doi.org/10.1117/12.391860

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KEYWORDS

Plasma

Plasma diagnostics

Interferometers

Laser energy

Laser systems engineering

Plasma systems

Spectroscopy

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