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Soviet Journal of Quantum Electronics

Investigation of the dependence of the output power of a laser utilizing infrared ytterbium lines on the pump pulse repetition frequency

Vladimir M. Klimkin, В. Е. Прокопьев, Vladimir G. Sokovikov

Published Apr 30, 1981• 4 citations
Publisher

Abstract

The output power of a laser utilizing self-terminating transitions in Yb atoms was investigated experimentally as a function of the pulse repetition frequency. It was found that the observed decrease in the output power (energy) as the pulse repetition frequency increased was not due to the finite lifetime of the lower active level.
DOI
10.1070/qe1981v011n04abeh006441

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We present the results of an experimental study of a Tl vapour/Ar mixture as an active medium. Under optical excitation of thallium to the 6d 2 D 3/2 state, we have achieved lasing at λ = 1.3 μm (7p 2 P 0 1/2 — 7s 2 S 1/2 transition) and 535 nm (7s 2 S 1/2 — 6p 2 P 0 3/2 ) through cascade transitions from the 6d 2 D 3/2 state to the upper laser levels. The electron deexcitation rate of the 6p 2 P 0 3/2 metastable state is no slower than 1.5×10 -8 cm 3 s -1 , meaning that this process cannot prevent self-terminating laser action at the 7s 2 S 1/2 — 6p 2 P 0 3/2 transition under electron-beam pumping at pulse repetition rates up to 100 kHz.