New possibilities for Cr<sup>3+</sup>ions as activators of the active media of solid-state lasers

Zharikov, E. V.; Lavrishchev, S. V.; Laptev, V. V.; Ostroumov, V. G.; Saidov, Z S; Smirnov, Valerii A; Щербаков, И. А.

doi:10.1070/qe1984v014n03abeh004891

Cited by 16 publications

(2 citation statements)

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“…Figure 4 shows the temperature dependence of the luminescence spectra of GGG:0.5% Cr 3+ nanoparticles upon excitation at 21 980 cm −1 in the 25-300 K range. At RT, only lu- minescence from the 4 T 2 state is detected in other Cr 3+ -doped garnets such as Gd 3 Sc 2 Ga 3 O 12 or La 3 Lu 2 Ga 3 O 12 [7,14], or fluorides [4], according to the weaker crystal-field strength. On the contrary, given that in the present case the 4 T 2 state is situated above the 2 E one, sharp lines corresponding to the 2 E → 4 A 2 emission together with 4 T 2 → 4 A 2 broadband emission are both observed in the RT emission spectrum of GGG:Cr 3+ nanoparticles.…”

Section: Temperature Dependencementioning

confidence: 99%

Temperature and pressure dependence of the optical properties of Cr^{3 +}-doped Gd₃Ga₅O₁₂nanoparticles

et al. 2011

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Since the crystal-field strength at the Cr(3+) site is very close to the excited-state crossover (ESCO), this work investigates the optical properties of Cr(3+)-doped Gd(3)Ga(5)O(12) (GGG) nanoparticles as a function of temperature and pressure in order to establish the effect of the ESCO on the optical behaviour of nanocrystalline GGG. Luminescence, time-resolved emission and lifetime measurements have been performed on GGG:0.5% Cr(3+) nanoparticles in the 25-300 K temperature range, as well as under hydrostatic pressure up to 20 GPa. We show how low temperature and high pressure progressively transforms Cr(3+)(4)T(2) --> (4)A(2) broadband emission into a ruby-like (2)E --> (4)A(2) luminescence. This behaviour together with the lifetime dependence on pressure and temperature are explained on the basis of the spin-orbit interaction between the (4)T(2) and (2)E states of Cr(3+).

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Section: Temperature Dependencementioning

confidence: 99%

Temperature and pressure dependence of the optical properties of Cr^{3 +}-doped Gd₃Ga₅O₁₂nanoparticles

et al. 2011

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“…The cross-section of the main 4 F 3/2 → 4 I 11/2 emission line at 1061 nm, about half of the 1064.1 nm Nd:YAG emission, evidences better prospects for inversion storage and Q-switched laser emission, with less limitation due to amplified spontaneous emission. Although the fairly weak cross-sections of the narrow absorption lines of Nd 3+ that are visible make the broad-band visible pumping such as with flash-lamps less favorable, efficient sensitized Nd 3+ emission was obtained by co-doping with Cr 3+ [6][7][8][9]. The transparent Nd-doped GSGG ceramics have spectroscopic properties similar to the single crystals [10].…”

Section: Introductionmentioning

confidence: 99%

Improved laser efficiency by direct diode laser pumping of the radiation-resistant Nd:gadolinium–scandium–gallium garnet

Lupeǐ¹,

Pavel²,

Lupeǐ³

2014

Laser Phys.

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Spectroscopic investigation of the radiation-resistant Nd:GSGG crystals and ceramics reported in this paper evidences that the absorption line at 883 nm corresponding to the unusual situation of quasi-degenerate absorption transitions 4 I 9/2 (2) → 4 F 3/2 (1) and 4 I 9/2 (3) → 4 F 3/2 (2) can be used for efficient direct diode laser pumping of this material, with stable absorption over an extended temperature range. It is inferred that the reduction of the quantum defect at this wavelength of pump compared to the traditional 807 nm pumping could improve the laser parameters and reduce drastically the heat generation, leading to a considerable extension of the power scalability. This possibility is demonstrated for the first time in the case of the 1061 nm laser emission in a continuous-wave and in the repetitive active acousto-optic and passive Q-switched laser emission. In all regimes this manifests in the reduction of the laser threshold, increase of slope efficiency and extension of the average power range. Additionally, in the active Q-switching this enables increased pulse energy and reduced pulse duration. The direct pumping could revitalize the utilization of Nd:GSGG for construction of lasers with storage of population inversion or working in an ionizing radiation environment.

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Luminescent Dopants

Zharikov¹,

Smirnov²

1997

Wide-Gap Luminescent Materials: Theory and Applications

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New possibilities for Cr³⁺ions as activators of the active media of solid-state lasers

Cited by 16 publications

References 2 publications

Temperature and pressure dependence of the optical properties of Cr^{3 +}-doped Gd₃Ga₅O₁₂nanoparticles

Temperature and pressure dependence of the optical properties of Cr^{3 +}-doped Gd₃Ga₅O₁₂nanoparticles

Improved laser efficiency by direct diode laser pumping of the radiation-resistant Nd:gadolinium–scandium–gallium garnet

Luminescent Dopants

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New possibilities for Cr3+ions as activators of the active media of solid-state lasers

Cited by 16 publications

References 2 publications

Temperature and pressure dependence of the optical properties of Cr3 +-doped Gd3Ga5O12nanoparticles

Temperature and pressure dependence of the optical properties of Cr3 +-doped Gd3Ga5O12nanoparticles

Improved laser efficiency by direct diode laser pumping of the radiation-resistant Nd:gadolinium–scandium–gallium garnet

Luminescent Dopants

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New possibilities for Cr³⁺ions as activators of the active media of solid-state lasers

Temperature and pressure dependence of the optical properties of Cr^{3 +}-doped Gd₃Ga₅O₁₂nanoparticles

Temperature and pressure dependence of the optical properties of Cr^{3 +}-doped Gd₃Ga₅O₁₂nanoparticles