Physical aspects of the operation of HF and DF lasers with a closed active-medium replacement cycle

Velikanov, S D; Zapol'skiĭ, A F; Frolov, Yu N

doi:10.1070/qe1997v027n01abeh000819

Cited by 13 publications

(8 citation statements)

References 3 publications

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Section: Non-chain Hf (Df) Lasers Excited By Sivdsupporting

confidence: 58%

Environmentally friendly HF (DF) lasers

Аполлонов¹

2016

Laser Phys.

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Dedicated to the 100th anniversary of the birth of Academician A M Prokhorov, this paper reviews the physics of self-sustained volume discharge without preionization-self-initiated volume discharge (SIVD)-in the working mixtures of non-chain hydrofluoride HF (deuterofluoride (DF)) lasers. The dynamics of SIVD in discharge gaps with different geometries is thoroughly described. The mechanisms for the restriction of current density in a diffuse channel in electric discharges in SF6 and SF6 based mixtures (which determines whether SIVD is possible) are proposed and analyzed using simple models. The most probable mechanisms are the electron impact dissociation of SF 6 and other mixture components, electron-ion recombination and electron attachment to vibrationally excited SF 6 molecules. Starting from a comparative analysis of the rate coefficients of these processes, it is shown that electron-ion recombination is capable of compensating for electron detachment from negative ions via electron impact. It is also established that SIVD is not only observed in SF 6 , but also in other strongly electronegative gases. The factors that determine the uniformity of the active medium in non-chain HF (DF) lasers are analyzed. Some special features of non-chain HF (DF) lasers with different apertures operating are carefully examined. Consideration is given to the problem of increasing the aperture and discharge volume of non-chain HF (DF) lasers. Based on our experimental results, the possibility of increasing the energy of such lasers to ~1 kJ and above is shown.

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Section: Non-chain Hf (Df) Lasers Excited By Sivdsupporting

confidence: 58%

Environmentally friendly HF (DF) lasers

Аполлонов¹

2016

Laser Phys.

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“…Therefore it is possible to use plane electrodes rounded off to small radii along their perimeters. We have not found any appreciable features for the P-P oper ating mode that have not been mentioned previously elsewhere [27][28][29]. The radiation divergence was measured in the special case where the laser operated on DF molecules Figure 15.…”

Section: Non-chain Hf (Df) Lasers Pumped By Sivdsupporting

confidence: 49%

High energy HF (DF) lasers

Аполлонов¹

2018

J Phys Res Appl

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“…A ZnSe:Fe 2+ plate (the sample) was placed normally to the optical axis of the resonator at a distance of 40 mm from the outcoupling mirror. The sample was pumped by a pulse-periodic HF(DF) laser described in [17,18]. Maximal pulse energies of the HF and DF lasers were, respectively, 55 mJ and 42 mJ.…”

Section: Methodsmentioning

confidence: 99%

Spectral and temporal characteristics of a ZnSe:Fe²⁺laser pumped by a non-chain HF(DF) laser at room temperature

Firsov¹,

Гаврищук²,

Kazantsev³

et al. 2014

Laser Phys. Lett.

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Spectral and temporal characteristics of a ZnSe:Fe 2+ laser with a nonselective resonator pumped at room temperature by the radiation of a pulse-periodical electrodischarge HF(DF) laser are studied. It was established that the spectral distributions of the energy and peak power of ZnSe:Fe 2+ laser generation depend on a spectral composition of the pumping radiation. The spectra exhibit a line structure with spectral intervals between neighboring lines δ λ ≈ 6.8 ÷ 8.6 nm. The shape of the ZnSe:Fe 2+ laser generation pulse is wavelength dependent. In a short-wavelength range, the pulse has the form of a peak with a duration of ~5 ns at half-maximum. At a longer wavelength, the peak is accompanied by a 'tail'. The duration and amplitude of the tail increase with wavelength, in a long-wavelength spectrum range, the peak actually becomes unnoticeable on a background of the 'tail'. The spectral dependence of the ZnSe:Fe 2+ laser generation pulse's shape affects the positions of the energy and peak power maxima on the wavelength axis. The dynamics of ZnSe:Fe 2+ laser generation under the pumping by the pulsed HF(DF) laser is discussed.

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Physical aspects of the operation of HF and DF lasers with a closed active-medium replacement cycle

Cited by 13 publications

References 3 publications

Environmentally friendly HF (DF) lasers

Environmentally friendly HF (DF) lasers

High energy HF (DF) lasers

Spectral and temporal characteristics of a ZnSe:Fe²⁺laser pumped by a non-chain HF(DF) laser at room temperature

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Physical aspects of the operation of HF and DF lasers with a closed active-medium replacement cycle

Cited by 13 publications

References 3 publications

Environmentally friendly HF (DF) lasers

Environmentally friendly HF (DF) lasers

High energy HF (DF) lasers

Spectral and temporal characteristics of a ZnSe:Fe2+laser pumped by a non-chain HF(DF) laser at room temperature

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Product

Resources

About

Spectral and temporal characteristics of a ZnSe:Fe²⁺laser pumped by a non-chain HF(DF) laser at room temperature