The effect of the discharge frequency on the performance of RF excited CO2 waveguide lasers

W.J. Witteman, S.N. Tskhai, Yu.B. Udalov, V.N. Ochkin, F.J. Blok, P.J.M. Peters

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Abstract

Research interest in the Ar-Xe laser has been strengthened considerably because this laser now produces output powers at the level of Watts and is becoming the most promising light source in the wavelength region of a few microns. The lasing occurs on the IR transitions (1.73-3.51 ¿m) between the 5d-6d manifolds of atomic xenon. Our breakthrough in this type of laser came when our results obtained with the electron beam sustained technology showed the beneficial effect of operating at high gas densities. From these observations and the accompanying modeling, the idea was supported to consider the dissociative recombination of ArXe+ or Xe2 + molecular ions with electrons as the primary channel for filling the upper laser level. Apart from this recombination process by three body collisions the increased density leads to homogeneous line broadening which has also a favourable effect on the power and efficiency. However, a homogeneous inversion density requires a homogeneous discharge in a high-density gas. This is from a technical point of view a great challenge. For continuous operation the waveguide structure with RF excitation has shown so far the best prospects for maintaining a homogeneous discharge at high densities, say above 100 Torr. The RF discharges are characterized by thin positively charged layers (sheaths) near the electrodes. They play an important role in the stabilisation of the discharge. At increasing current density the discharge switches from ¿- to ¿-mode
Original languageUndefined
Title of host publicationThe effect of the discharge frequency on the performance of RF excited CO2 waveguide lasers, CLEO/EQEC Europe
Place of PublicationHamburg, Duitsland
PublisherIEEE
Pages84-84
Number of pages1
ISBN (Print)0-7803-3169-9
DOIs
Publication statusPublished - 8 Sep 1996
Event9th Annual Meeting of the IEEE Lasers and Electro-Optics Society (LEOS) 1996 - Boston, United States
Duration: 18 Nov 199619 Nov 1996
Conference number: 9

Publication series

Name
PublisherIEEE
Volume2

Conference

Conference9th Annual Meeting of the IEEE Lasers and Electro-Optics Society (LEOS) 1996
CountryUnited States
CityBoston
Period18/11/9619/11/96

Keywords

  • IR-56011
  • METIS-130666

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