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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 38, Iss. 14 — Jul. 15, 2013
  • pp: 2428–2430

Time-resolved tunable diode laser absorption spectroscopy of pulsed plasma

P. Adámek, J. Olejníček, M. Čada, Š. Kment, and Z. Hubička  »View Author Affiliations

Optics Letters, Vol. 38, Issue 14, pp. 2428-2430 (2013)

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A method for time-resolved tunable diode laser absorption spectroscopy (LAS) has been developed. In this Letter, we describe in detail a developed electronic module that controls the time resolution of the LAS system. The transistor–transistor logic signal triggering the plasma pulse is used for generation of two signals: the first one triggers fine tuning of the laser wavelength and the second one controls time-defined signal sampling from the absorption detector. The described method and electronic system enable investigation of the temporal evolution of the density and temperature of selected particles in technological plasma systems. The high-power impulse magnetron sputtering system with a period of 10 ms and a duty cycle of 1% has been used to verify this method. The temporal evolution of argon metastable density was measured in the active part of the pulse and in the afterglow. The resulting density of Ar* displays a double-peak structure with a first peak in the plasma “ON” phase and a second peak in the afterglow approximately 1 ms after the end of the pulse.

© 2013 Optical Society of America

OCIS Codes
(140.2020) Lasers and laser optics : Diode lasers
(140.3600) Lasers and laser optics : Lasers, tunable
(300.1030) Spectroscopy : Absorption
(300.6260) Spectroscopy : Spectroscopy, diode lasers
(300.6500) Spectroscopy : Spectroscopy, time-resolved
(280.5395) Remote sensing and sensors : Plasma diagnostics

ToC Category:

Original Manuscript: March 28, 2013
Revised Manuscript: June 7, 2013
Manuscript Accepted: June 7, 2013
Published: July 5, 2013

P. Adámek, J. Olejníček, M. Čada, Š. Kment, and Z. Hubička, "Time-resolved tunable diode laser absorption spectroscopy of pulsed plasma," Opt. Lett. 38, 2428-2430 (2013)

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