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Proceedings Paper

Two-Photon Amplification On Cascade Transitions
Author(s): Hans Harry Schlemmer; Dieter Frolich; Herbert Welling
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Paper Abstract

In a 3-level system with a cascade configuration of the energy levels the process of stimulated 2-photon emission produces anisotropy and asymmetry of the amplification or absorption lineshape. In order to analyse the possibility of a tunable 2-photon laser, some properties of He-Ne cascade lasers were investigated theoretically and experimentally. The cascade oscillates simultaneously on the 3s2-3p4 transition at 3.4 μm and on the 3p4-2s2 transition at 2.4 μm. The amplification anisotropy was observed in a unidirectional ring laser, giving the first proof of strong field 2-photon gain from a continuous incoherently produced population inversion. The amplification asymmetry was measured in a standing wave laser and was used to tune the laser beyond the limits nredicted by single-photon theory. The experiments indicate the possibility of extending the tuning range into the region of "pure" 2-photon oscillation.

Paper Details

Date Published: 15 May 1981
PDF: 6 pages
Proc. SPIE 0236, 1980 European Conf on Optical Systems and Applications, (15 May 1981); doi: 10.1117/12.958975
Show Author Affiliations
Hans Harry Schlemmer, Universitat Hannover (Germany)
Dieter Frolich, Universitat Hannover (Germany)
Herbert Welling, Universitat Hannover (Germany)


Published in SPIE Proceedings Vol. 0236:
1980 European Conf on Optical Systems and Applications
D. J. Kroon, Editor(s)

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