Publication:
Luminescent and lasing characteristics of polycrystalline Cr:Fe:ZnSe exited at 2.09 and 2.94 mu m wavelengths

Дата
2019
Авторы
Antonov, V. A.
Firsov, K. N.
Gavrishchuk, E. M.
Ikonnikov, V. B.
Journal Title
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Volume Title
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Научные группы
Организационные подразделения
Выпуск журнала
Аннотация
The luminescence of Cr2+ and Fe2+ in Cr:Fe:ZnSe polycrystals excited at room temperature by pulsed lasers at wavelengths of 2.09 and 2.94 proportional to m was studied. For comparison, we also studied the luminescence in single crystals and polycrystals of Fe:ZnSe with iron ion concentration in the range from 5.6 x 10(18) to 5.7 x 10(19) cm(-3). Doping of the polycrystalline samples was carried out using a high-temperature diffusion process with subsequent control of the dopants concentration distribution over the crystal depth. The dependence of the luminescence lifetime tau lt of Fe2+ ions on the dopants concentration in crystals excited at a wavelength of 2.94 proportional to m was obtained. It was found that chromium quenches the luminescence of Fe2+ no less actively (if no more) than iron itself. The tau lt values were measured for Fe:ZnSe excited at a wavelength of 2.94 proportional to m and Cr:Fe:ZnSe samples with the same maximum Fe2+ ions concentrations (approximate to 0.9 x 10(19) cm(-3)) at wavelengths of 2.94 proportional to m and 2.09 proportional to m. A noticeable increase in tlt value and luminescence rise time was observed in Cr:Fe:ZnSe crystals excited at a wavelength of 2.09 proportional to m (tau lt approximate to 460 ns) compared to 2.94 proportional to m (tau lt approximate to 240 ns). For comparison, the value of tau lt in Fe:ZnSe was about 340 ns. The obtained results confirm the fast energy transfer in Cr:Fe:ZnSe crystals from excited chromium ions to iron ions. The output characteristics of lasers on Fe:ZnSe and Cr:Fe:ZnSe polycrystalline active elements with pumping by HF laser radiation were compared. The slope efficiency with respect to the absorbed energy of Cr:Fe:ZnSe lasers was significantly lower, and the generation threshold was two times higher than for Fe:ZnSe lasers. The prospects for creating a room temperature laser, in which the excitation of iron ions will be carried out through energy transfer from chromium ions, are analyzed.
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Цитирование
Luminescent and lasing characteristics of polycrystalline Cr:Fe:ZnSe exited at 2.09 and 2.94 mu m wavelengths / Antonov, VA [et al.] // Laser Physics Letters. - 2019. - 16. - № 9. - 10.1088/1612-202X/ab3851
URI
https://www.doi.org/10.1088/1612-202X/ab3851
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85074448488&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000497995400001
 https://openrepository.mephi.ru/handle/123456789/18946
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