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Superradiance at Transitions Terminating at Metastable Levels of Helium and Thallium

Anatoly A. Isaev, P. I. Ishchenko, Gueorgii G. Petrash

Sep 1, 19675 citations

Observation of Dicke superradiance at 1.30 μm in atomic Tl vapor

Allen M. Flusberg, THOMAS W. MOSSBERG, Sven R. Hartmann

Physics Letters AOct 1, 197673 citations

Relaxation of the 6p2P03/2metastable state in a self-terminating thallium laser

Petr A. Bokhan, Д Э Закревский, V A Kim

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.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.

Quantum ElectronicsDec 31, 20081 citation

Superradiance at a wavelength of 535 nm in a mixture of calcium and thallium vapors

A. V. Andreev, Sergei I. Derzhavin, D. A. Moshkovskii +1 more

Journal of Russian Laser ResearchJul 1, 19961 citation

Stimulated emission of the 535 nm thallium line as a result of quasiresonant optical pumping of a Tl–He mixture by radiation from a recombination He–Ca laser

S. N. Atamas, L. M. Bukshpun, Yu V Koptev +2 more

Stimulated emission of the 535 nm line of thallium was observed when a Tl-He mixture was pumped optically in the violet wing of a pressure-broadened resonance line of thallium at 377.6 nm by a recombination He–Ca laser emitting at λ = 373.7 nm. Pumping resulted from the absorption transitions between repulsive terms of the Tl-He quasimolecule. The average stimulated radiation power reached 5 mW when the pulse repetition frequency was 6 kHz. The efficiency of conversion of the useful part of the pump pulse was 45%.Stimulated emission of the 535 nm line of thallium was observed when a Tl-He mixture was pumped optically in the violet wing of a pressure-broadened resonance line of thallium at 377.6 nm by a recombination He–Ca laser emitting at λ = 373.7 nm. Pumping resulted from the absorption transitions between repulsive terms of the Tl-He quasimolecule. The average stimulated radiation power reached 5 mW when the pulse repetition frequency was 6 kHz. The efficiency of conversion of the useful part of the pump pulse was 45%.

Soviet Journal of Quantum ElectronicsFeb 28, 19845 citations

Phase transition to superradiance in a multicomponent system

VIORICA N. GHEORGHE

Applied Physics BNov 1, 19850 citations

Two-component superradiance at the self-terminating transitions of Ca and Tl of 535 nm

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Two-component superradiance at the self-terminating transitions of Ca and Tl of 535 nm

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