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Proceedings Paper

Influence of shock waves in the discharge region of a TEA CO2 laser
Author(s): Masayoshi Hagiwara; Mitsutoshi Suzuki; Osamu Suto; Takeshi Takahashi; Shinichiroh Kosugi; Sho Hibino; Akira Suda; Hideo Tashiro
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Paper Abstract

Transverse and longitudinal density disturbances in the discharge volume of a transversely excited atmospheric carbon-dioxide laser are measured using a laser schlieren method, and two-dimensional aerodynamic calculations qualitatively reproduce the temporal histories of the disturbances. Exponential decay of the transverse disturbance between the flattened electrodes lasts for several milliseconds. An efficient damping of the shock wave after discharge is confirmed using an acoustic attenuator based on the Helmholtz resonator design. Accumulated pressure disturbances in the volume due to successive laser shots induce a gradual decrease to the steady-state energy level in a pulse-periodic operation, and it is deduced that the modulational instability in the shot to shot pulse energy results from the longitudinal standing wave.

Paper Details

Date Published: 4 April 1997
PDF: 7 pages
Proc. SPIE 2987, Gas and Chemical Lasers and Applications II, (4 April 1997); doi: 10.1117/12.271568
Show Author Affiliations
Masayoshi Hagiwara, Power Reactor and Nuclear Fuel Development Corp. (Japan)
Mitsutoshi Suzuki, Power Reactor and Nuclear Fuel Development Corp. (Japan)
Osamu Suto, Power Reactor and Nuclear Fuel Development Corp. (Japan)
Takeshi Takahashi, Power Reactor and Nuclear Fuel Development Corp. (Japan)
Shinichiroh Kosugi, Toshiba Corp. (Japan)
Sho Hibino, Toshiba Corp. (Japan)
Akira Suda, RIKEN-The Institute of Physical and Chemical Research (Japan)
Hideo Tashiro, RIKEN-The Institute of Physical and Chemical Research (Japan)


Published in SPIE Proceedings Vol. 2987:
Gas and Chemical Lasers and Applications II
Robert C. Sze; Ernest A. Dorko, Editor(s)

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