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physica status solidi (a)

Spectroscopic characteristics of the erbium ions and laser action at the transition4S3/2 →4I9/2 (λe ≍ 1.66 μm) in the crystals of gadolinium, yttrium, and lutecium orthoaluminates

I. V. Mochalov

Published Sep 16, 1979• 7 citations
Publisher

Abstract

The Czochralski method is employed to synthesize crystals of compound orthoaluminates: GdAlO3, YAlO3, and LuAlO3 doped with erbium (Er3+). The crystal splitting schemes of 4S3/2, 4F9/2, 4IJ levels of Er3+ at 77 K are plotted based on an analysis of optical spectra. Stimulated emission due to a 4S3/2 → 4I9/2 transition is observed from Er3+ ions GdAlO3, YAlO3 at 77 K. Pulsed laser action at room temperature is only observed from Er3+ ions in YAlO3.

DOI
10.1002/pssa.2210550107

Related papers

Spectroscopic Characteristics of the Erbium Ions and Laser Action at the Transition 4S3/2 -»*4I9/2 (λe = 1.66 um) in the Crystals of Gadolinium, Yttrium, and Lutecium Orthoaluminates

I. V. Mochalov

Spectroscopic Characteristics of the Erbium Ions and Laser Action at the Transition 4S3/2 -»*4I9/2 (λe = 1.66 um) in the Crystals of Gadolinium, Yttrium, and Lutecium Orthoaluminates was published in Volume 55, Number 1 September 16 on page 79.

De Gruyter eBooks•Dec 31, 1979•0 citations

Spectral properties of rare-earth ions in YAlO3 crystals

V. A. Antonov, P. A. Arsenev, K. E. Bienert +1 more

YAlO3 crystals have been prepared with small percentages of different rare earths substituted for yttrium. The absorption and luminescence spectra of the samples activated with Dy, Ho, Er, Tm, and Yb have been measured at 77 K. An analysis of these spectra gave the positions of many of the crystalline Stark levels. Stimulated emission has been observed from Ho3+, Er3+, and Tm3+ ions in crystals of YAlO3.

physica status solidi (a)•Sep 16, 1973•42 citations

Stimulated emission from Er3+ions in yttrium aluminum garnet crystals at λ = 2.94 μ

Evgeny V. Zharikov, V I Zhekov, L. A. Kulevskiǐ +7 more

Stimulated emission due to the 4 I 11/2 – 4 I 13/2 transition (λ = 2.936 μ) in yttrium aluminum garnet (Y 3 Al 5 O 12 ) doped with Er 3+ ions (30 wt%) was observed for the first time at 300°K. The output energy from crystals of 50 × 3 mm dimensions was 0.3 J under free-oscillation conditions and 0.05 J in the case of Q switching. The lifetime of the 4 I 11/2 level was determined for crystals with 3–30 wt% Er 3+ . The energy from the higher Er 3+ levels relaxed in a cascade manner through 4 I 11/2 to 4 I 13/2 .

Soviet Journal of Quantum Electronics•Aug 31, 1975•107 citations

Spectral characteristics of the thulium ion and cascade generation of stimulated radiation in a YAlO3:Tu3+:Cr3+crystal

A O Ivanov, I. V. Mochalov, Alexandra M. Tkachuk +2 more

Stimulated emission was obtained from Tu 3+ ions in YAlO 3 crystals doped with 1.0 at. % Tu and 0.1 at. % Cr. The stimulated radiation was generated by the 3 F 4 → 3 H 5 (λ 1 )→ 3 H 5 → 3 H 6 (λ 2 ) cascade at wavelengths λ 1 = 2.34 μ and λ 1 =1.93 μ and the threshold was 3.5 J/cm at 90 °K. A scheme of radiative and nonradiative transitions between the terms was constructed. The absorption and luminescence spectra recorded at 4.2 °K were used to derive the Stark splitting scheme of the 3 H 4 and 3 H 6 terms of the thulium ion.

Soviet Journal of Quantum Electronics•Jan 31, 1975•11 citations

Lasing in Y3Al5O12:Er3+(λ = 2.94 μm) crystals as a result of selective excitation of the lower active level

V I Zhekov, Vladimir A. Lobachev, T. M. Murina +3 more

Lasing was induced in Y1.5Er1.5Al5O12 (λ = 2.94 μm) crystals by selective pumping of the electronic–vibrational wing of the 4I15/2–4I13/2 transition. A population inversion was established in this YAG:Er3+ laser by a strong interaction between the excited Er3+ ions at the 4I13/2 level and the transfer of energy from the lower active level to the upper one in accordance with the 4I13/2–4I9/2, 4I13/2–4I15/2 scheme.

Soviet Journal of Quantum Electronics•Jun 30, 1989•5 citations

Mechanism of a population inversion between the4I11/2and4I13/2levels of the Er3+ion in Y3AI5O12crystals

V I Zhekov, Boris V. Zubov, Vladimir A. Lobachev +3 more

Studies of the spectra of stimulated emission from Y 3 AI 5 O 12 :Er 3+ crystals ( 4 I 11/2 – 4 I 13/2 ) containing 20 wt. % activator ions, showed that, as the temperature decreased from 300 to 77°K, a change was observed in the emission wavelength (at T = 300°K it was found that λ 1 = 2.9364 μ λ 2 = 2.8310 μ and at T = 77°K it was found that λ 1 = 2.6930 μ , λ 2 = 2.8970 μ ). This could not be attributed to a thermal redistribution of the populations of the Stark components of the 4 I 11/2 and 4 I 13/2 upper and lower active levels. An analysis of the results showed that the temperature shift of the stimulated emission spectrum was due to changes in the processes of relaxation of excitation from the upper levels of the Er 3+ ion which caused substantial changes in the populations of the 4 I 11/2 and 4 I 13/2 multiplets.

Soviet Journal of Quantum Electronics•Apr 30, 1980•20 citations
The Czochralski method is employed to synthesize crystals of compound orthoaluminates: GdAlO3, YAlO3, and LuAlO3 doped with erbium (Er3+). The crystal splitting schemes of 4S3/2, 4F9/2, 4IJ levels of Er3+ at 77 K are plotted based on an analysis of optical spectra. Stimulated emission due to a 4S3/2 → 4I9/2 transition is observed from Er3+ ions GdAlO3, YAlO3 at 77 K. Pulsed laser action at room temperature is only observed from Er3+ ions in YAlO3.
Stimulated emission due to the 4 I 11/2 – 4 I 13/2 transition (λ = 2.936 μ) in yttrium aluminum garnet (Y 3 Al 5 O 12 ) doped with Er 3+ ions (30 wt%) was observed for the first time at 300°K. The output energy from crystals of 50 × 3 mm dimensions was 0.3 J under free-oscillation conditions and 0.05 J in the case of Q switching. The lifetime of the 4 I 11/2 level was determined for crystals with 3–30 wt% Er 3+ . The energy from the higher Er 3+ levels relaxed in a cascade manner through 4 I 11/2 to 4 I 13/2 .
Stimulated emission was obtained from Tu 3+ ions in YAlO 3 crystals doped with 1.0 at. % Tu and 0.1 at. % Cr. The stimulated radiation was generated by the 3 F 4 → 3 H 5 (λ 1 )→ 3 H 5 → 3 H 6 (λ 2 ) cascade at wavelengths λ 1 = 2.34 μ and λ 1 =1.93 μ and the threshold was 3.5 J/cm at 90 °K. A scheme of radiative and nonradiative transitions between the terms was constructed. The absorption and luminescence spectra recorded at 4.2 °K were used to derive the Stark splitting scheme of the 3 H 4 and 3 H 6 terms of the thulium ion.
Studies of the spectra of stimulated emission from Y 3 AI 5 O 12 :Er 3+ crystals ( 4 I 11/2 – 4 I 13/2 ) containing 20 wt. % activator ions, showed that, as the temperature decreased from 300 to 77°K, a change was observed in the emission wavelength (at T = 300°K it was found that λ 1 = 2.9364 μ λ 2 = 2.8310 μ and at T = 77°K it was found that λ 1 = 2.6930 μ , λ 2 = 2.8970 μ ). This could not be attributed to a thermal redistribution of the populations of the Stark components of the 4 I 11/2 and 4 I 13/2 upper and lower active levels. An analysis of the results showed that the temperature shift of the stimulated emission spectrum was due to changes in the processes of relaxation of excitation from the upper levels of the Er 3+ ion which caused substantial changes in the populations of the 4 I 11/2 and 4 I 13/2 multiplets.