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Q: Fachverband Quantenoptik und Photonik

Q 35: Poster I

Q 35.97: Poster

Dienstag, 19. März 2013, 16:00–18:30, Empore Lichthof

Lasing without inversion in the ultra violet regime — •Martin Sturm and Reinhold Walser — Institut für angewandte Physik, TU Darmstadt

Lasing without inversion on the basis of atomic coherence effects is a promising approach to continuous wave lasing in the ultra violet regime since the threshold pumping power for population inversion scales with ω⁴ to ω⁶ [1]. Despite successful proof of principle experiments, no lasing without inversion in the ultra violet regime has been realized until now.

In 1999 Fry et al. [2] proposed a lasing without inversion experiment based on the so called ’double-dark’ scheme in a four level system. This setup allows Doppler-free lasing on 253 nm in Hg. We investigate this scheme theoretically: technical noise of pump lasers, the geometry of laser medium, the resonator design. This analysis is in cooperation with an experiment performed by B. Rein in the research group of Th. Walther at the Institute of Applied Physics/TU Darmstadt. The current status of this considerations is presented.

J. Mompart and R. Corbalan, "Lasing without inversion", Journal of Optics B 3, R7-R24 (2000)
E. Fry, M. Lukin, T. Walther and G. Welch, "Four-level atomic coherence and cw VUV lasers", Optics Communications 179, 499-504 (1999)