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Induced emission by trivalent erbium ions in crystals of yttrium-aluminum garnet

Georgii M. Zverev, Vladimir M. Garmash, А. М. Онищенко +4 more

Journal of Applied SpectroscopyNov 1, 197411 citations

Induced emission of triply-charged erbium ions in yttrium-aluminum garnet crystals

Georgii M. Zverev, Vladimir M. Garmash, А. М. Онищенко +4 more

Zhurnal Prikladnoi SpektroskopiiNov 1, 19740 citations

Fast-beam-laser lifetime measurements for energy levels in singly-ionized lutetium and thulium

Michelle Marilyn. McCurdy

Jan 1, 19990 citations

Optical absorption spectra of erbium iron garnet (ErIG)

E. Orlich, S. Hüfner

Zeitschrift für Physik A Hadrons and NucleiOct 1, 197035 citations

Temperature dependence of the enhanced excited state absorption in erbium-doped garnets

Yoshinobu Maeda, Toshikazu Yamada

Temperature dependence of an enhanced excited state absorption was investigated in erbium-doped garnet crystals using 787.3 and 787.8 nm laser diodes. The enhanced absorption was obtained at temperature ranges of 15–570 K, 15–420 K, and 15–1200 K in a yttrium aluminum garnet, a yttrium scandium gallium garnet, and a lutetium aluminum garnet, respectively. Absorption peaks corresponding to both the I1615/2−I49/2 and the I1613/2−I211/2 transitions of Er3+ in garnets were shifted from those for 300 K at high temperature. The enhanced absorption weakened at high temperature because an absorption cross section from the I413/2 level to the H211/2 level decreased due to the shift of the absorption peaks. It has been confirmed that a mechanism of the enhanced absorption can be explained by calculating the rate equations based on an analytical model for a five-level system of the Er3+ ion. It is suggested that the enhanced absorption weakened at temperatures lower than 12 K because the number of phonons decreased due to low temperature.Temperature dependence of an enhanced excited state absorption was investigated in erbium-doped garnet crystals using 787.3 and 787.8 nm laser diodes. The enhanced absorption was obtained at temperature ranges of 15–570 K, 15–420 K, and 15–1200 K in a yttrium aluminum garnet, a yttrium scandium gallium garnet, and a lutetium aluminum garnet, respectively. Absorption peaks corresponding to both the I1615/2−I49/2 and the I1613/2−I211/2 transitions of Er3+ in garnets were shifted from those for 300 K at high temperature. The enhanced absorption weakened at high temperature because an absorption cross section from the I413/2 level to the H211/2 level decreased due to the shift of the absorption peaks. It has been confirmed that a mechanism of the enhanced absorption can be explained by calculating the rate equations based on an analytical model for a five-level system of the Er3+ ion. It is suggested that the enhanced absorption weakened at temperatures lower than 12 K because the number of phonons decreased due to low temperature.

Journal of Applied PhysicsJun 15, 199815 citations

All-optical inverter operating over a temperature range of 15–1400 K in erbium-doped lutetium aluminum garnet

Yoshinobu Maeda

An all-optical inverter, which operates over a range of 15–1400 K, was demonstrated in an erbium-doped lutetium aluminum garnet crystal with 787.3, 787.9 and 790 nm laser diodes. In the case of 787.3 nm, the reversed-phase wave forms were obtained in a temperature range of 15–1100 K. In the case of 787.9 and 790 nm, they were observed up to 1400 K. It has been confirmed that the negative nonlinear absorption effect can be explained by considering an enhanced absorption model for a five-level system of the Er3+ ion. The effect has a characteristic, which is almost independent of the ambient temperature because it is formed by optical transitions of the inner shell of the erbium atom.An all-optical inverter, which operates over a range of 15–1400 K, was demonstrated in an erbium-doped lutetium aluminum garnet crystal with 787.3, 787.9 and 790 nm laser diodes. In the case of 787.3 nm, the reversed-phase wave forms were obtained in a temperature range of 15–1100 K. In the case of 787.9 and 790 nm, they were observed up to 1400 K. It has been confirmed that the negative nonlinear absorption effect can be explained by considering an enhanced absorption model for a five-level system of the Er3+ ion. The effect has a characteristic, which is almost independent of the ambient temperature because it is formed by optical transitions of the inner shell of the erbium atom.

Applied Physics LettersJan 26, 199818 citations

Investigation of absorption from the lower laser level 4I132 of the erbium ions in the lutetium garnet

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Investigation of absorption from the lower laser level 4I132 of the erbium ions in the lutetium garnet

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