Berlin 2014 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 69: Quantum effects: Interference and correlations II
Q 69.6: Vortrag
Freitag, 21. März 2014, 17:45–18:00, DO26 208
Feasibility of UV lasing without inversion in mercury vapor — •Martin Sturm and Reinhold Walser — Institut für Angewandte Physik, TU Darmstadt
Lasing without inversion has been a field of intense research over the past two decades as it offers a promising approach to UV lasing. However, despite all commitment an UV laser operating without population inversion is yet to be build. We investigate the feasibility of a proposed experiment [1] which allows for lasing on the 61S0 ↔ 63P1 transition in mercury at a wavelengths of 253.7 nm. Utilizing interacting dark resonances [2], this proposal circumvents known problems occurring in lasing without inversion at short wavelengths, e.g. the effect of Doppler broadening.
We formulate the radiation damped optical Bloch equations for all relevant 13 atomic states. We generalize these equations by considering technical phase noise of the driving fields. Using semiclassical laser theory we obtain the stationary output power from the Doppler broadened susceptibilities. From the linear inhomogeneous susceptibility we calculate the modes of the ring resonator with Fourier optics. Our results [3] confirm the feasibility of UV lasing and reveal its dependence on experimental parameters.
[1] E. S. Fry, M. D. Lukin, T. Walther, G. R. Welch. Opt. Commun. 179, 499-504, (2000).
[2] M. D. Lukin, S. F. Yelin, M. Fleischhauer, M. O. Scully. Phys. Rev. A 60, 3225-3228, (1999).
[3] M. Sturm. Master thesis, TU Darmstadt, (2013).