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Photoionization-pumped gain at 185 nm in a laser-ablated indium plasma

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Author

  • R. A Lacy
  • A. C Nilsson
  • R. L Byer
  • W. T Silfvast
  • O. R Wood
  • Sune Svanberg

Summary, in English

We reportwhat is to our knowledge the first production of gain by inner-shell photoionization of ions. Photoionization of 4d electrons from In$+$ ions created a population inversion on a 185-nm In2$+$ transition. This scheme is an isoelectronic scaling of the 442-nm Cd$+$ laser. A single-pass gain constant of 0.9 {\textpm} 0.3 cm{\textminus}1 over a 0.4-cm path was pumped by soft x rays generated by less than 50 mJ of 1.06-$\mu$m light focused onto a tantalum target. Laser ablation of a liquid-indium target provided a high density (1016 cm{\textminus}3) of ground-state In$+$ ions for this scheme. An indium amplified spontaneous emission laser and a synchronously pumped indium laser oscillator are proposed.

Department/s

Publishing year

1989

Language

English

Pages

1209-1216

Publication/Series

Journal of the Optical Society of America B: Optical Physics

Volume

6

Issue

6

Document type

Journal article

Publisher

Optical Society of America

Topic

  • Atom and Molecular Physics and Optics

Status

Published

ISBN/ISSN/Other

  • ISSN: 0740-3224