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Proceedings Paper

Low-energy electron-beam-pumped lasers
Author(s): Andreas Ulrich; Claudia Niessl; Hiromitsu Tomizawa; Jochen Wieser; Daniel E. Murnick; Manfred Salvermoser
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Paper Abstract

Low energy electron beams with particle energies of typically 10 to 20 keV are used for pumping gas lasers. Extremely thin (300 nm) ceramic (SiNx) membranes are used as entrance foils for the electron beam. Laser gas pressure up to several atmospheres is possible using this technique if the dimension of one side of the foil is restricted to about 1 mm. Energy loss of the electrons in the foil is less than 10%. The short range of the low energy electrons in the laser medium leads to a high specific power deposition. In transverse geometry the beam pumped volume is cylindrical with typically 1 to 3 mm diameter. This is well matched with the diameter of optical modes in stable optical cavities. The new pumping method is demonstrated using the 1.73 micrometers 5d[3/2]1-6p[5/2]2 XeI laser line in Ar-Xe laser gas mixtures at pressures between 130 and 650 mbar. Laser effect was observed for Xe concentrations between 0.1 and 1%. A low threshold pumping power of 5.5 W and a maximum output power of 6 mW at 13 W pumping power were measured. Scaling to higher power and shorter wavelength laser systems is discussed.

Paper Details

Date Published: 24 April 2000
PDF: 7 pages
Proc. SPIE 4071, International Conference on Atomic and Molecular Pulsed Lasers III, (24 April 2000); doi: 10.1117/12.383443
Show Author Affiliations
Andreas Ulrich, Technische Univ. Muenchen (Germany)
Claudia Niessl, Technische Univ. Muenchen (Germany)
Hiromitsu Tomizawa, Technische Univ. Muenchen (Germany)
Jochen Wieser, Technische Univ. Muenchen (Germany)
Daniel E. Murnick, Rutgers Univ. (United States)
Manfred Salvermoser, Rutgers Univ. (Germany)

Published in SPIE Proceedings Vol. 4071:
International Conference on Atomic and Molecular Pulsed Lasers III
Victor F. Tarasenko; Georgy V. Mayer; Gueorgii G. Petrash, Editor(s)

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