Dependence of gain and output power on cathode to anode area ratio in a segmented hollow-cathode Cu-II 781 nm laser

B. Leigh, R. C. Tobin, K. Rózsa, Z. Donkó

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The characteristics of a segmented hollow-cathode He-Cu+ 781 nm laser are modified by varying the cathode to anode area ratio (C/A), in steps from 3.0 to 0.33, for a fixed bore diameter of 4 mm. The discharge voltage for a given current to pressure ratio, and consequently the small-signal gain and multimode output power for a given current, are significantly increased when C/A is reduced. For a given gain in excess of 20% m-1, the input power decreases slightly as C/A is reduced. However, for a given multimode output power, the input power is almost independent of C/A (0.33 to 2.0). For a gain of 60% m-1 the current density decreases from 450 to 340 mA cm-2 when the area ratio is reduced from 3 to 0.5.

Original languageEnglish
Pages (from-to)2946-2952
Number of pages7
JournalJournal of Physics D: Applied Physics
Volume30
Issue number21
DOIs
Publication statusPublished - Nov 7 1997

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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