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Frequency up-conversion He-Ne laser without inversion |
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| Authors: | V Ahufinger R Shuker R Corbalán |
| Institution: | (1) Departament de Física, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain;(2) Institut für Theoretische Physik, Universität Hannover, 30167 Hannover, Germany;(3) Department of Physics, Ben Gurion University of the Negev, P.O. Box 653, Beer Sheva, 84105, Israel |
| Abstract: | A scheme for obtaining up-conversion lasing without inversion in the visible range is proposed using a Doppler-broadened He-Ne mixture as active medium. We consider a cascade scheme (2s2 2p21s3) with a frequency up-conversion ratio of 1.91. The upper transition is inverted and driven by an external field and lasing without inversion occurs at 616.4 nm provided that the collisional decay rates of the 1s3 and 1s5 levels overcome a certain threshold. PACS 42.50.Gy; 32.80.Qk; 42.70.Hj |
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