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Purely electronic zero phonon lines. Recent developments

Karl K. Rebane

Journal of LuminescenceFeb 5, 20042 citations

Comparison of Yb3+: YAP with Yb3+: YAG cooling crystals

Chaoyu Wang, Jianping Yin

Abstract YAlO 3 (YAP) shows lower phonon energy than Y 3 Al 5 O 12 (YAG), which implies a lower temperature can be obtained in Yb 3+ -doped YAP according to the single-frequency phonon model. Here, a 2% Yb 3+ : YAP crystal was refrigerated by anti-Stokes fluorescence and compared to YAG crystal with the same doping concentration in experiments. Yb 3+ exhibited a broad spectral cooling range in YAP from 1020nm to 1070nm, which was broader than in YAG from 1020 nm to 1055 nm. A minimum achievable temperature (MAT) dropped to ~ 249.7 K at 1040 nm for Yb 3+ : YAP, which was lower than that of ~ 259.3 K obtained in 2% Yb 3+ : YAG. Further analysis predicted that the cooling limit of two crystals can reach ~167 K for Yb 3+ : YAP and ~171 K for Yb 3+ : YAG from room temperature. This work exhibited the excellent cooling properties of Yb 3+ : YAP compared with Yb 3+ : YAG in experiment and provided a unique perspective for the practical application of high-power Radiation balance lasers (RBLs).Abstract YAlO 3 (YAP) shows lower phonon energy than Y 3 Al 5 O 12 (YAG), which implies a lower temperature can be obtained in Yb 3+ -doped YAP according to the single-frequency phonon model. Here, a 2% Yb 3+ : YAP crystal was refrigerated by anti-Stokes fluorescence and compared to YAG crystal with the same doping concentration in experiments. Yb 3+ exhibited a broad spectral cooling range in YAP from 1020nm to 1070nm, which was broader than in YAG from 1020 nm to 1055 nm. A minimum achievable temperature (MAT) dropped to ~ 249.7 K at 1040 nm for Yb 3+ : YAP, which was lower than that of ~ 259.3 K obtained in 2% Yb 3+ : YAG. Further analysis predicted that the cooling limit of two crystals can reach ~167 K for Yb 3+ : YAP and ~171 K for Yb 3+ : YAG from room temperature. This work exhibited the excellent cooling properties of Yb 3+ : YAP compared with Yb 3+ : YAG in experiment and provided a unique perspective for the practical application of high-power Radiation balance lasers (RBLs).

Applied Physics BApr 27, 20261 citation

Efficiency of population of the4I13/2level of the Er3+ion and the possibility of lasing at 1.5 μm in Yb, Er:YAG at high temperatures

B. I. Galagan, Boris I. Denker, Vyacheslav V Osiko +1 more

It is shown that, as the temperature of an Yb, Er:YAG crystal is increased from room temperature to 400–600°C, the efficiency of energy accumulation on the 4 I 13/2 level of the Er 3+ ion increases by several times upon optical pumping through Yb 3+ ions. Under these conditions, up to 60% of erbium ions can be excited, which gives promise that lasing at a wavelength of 1.54 μm can be achieved in the Yb, Er:YAG crystal in the three-level scheme.

Quantum ElectronicsOct 31, 20075 citations

Excitation transfer and zero phonon lines

Darryl Lyle Smith

Physics Letters AJun 1, 19753 citations

Femtosecond Photon Echo In Solids: Selective Spectroscopy Not Using Zero-Phonon Lines

Игорь Сергеевич Осадько, M. V. Stashek

Fluorescence—line—narrowing, spectral hole—burning and single molecule spectroscopy are methods of selective spectroscopy using zero-phonon lines (ZPL) to make selection in molecular ensemble. However if electron-phonon coupling is strong or sample temperature is near to room temperature, ZPL are absent and the optical band consists of electron-phonon transitions which are called phonon-side-band (PSB). In these cases the above mentioned methods of selective spectroscopy do not work. Can we get an information concerning a homogeneous optical band from inhomogeneously broadened bands in these cases? The answer is yes if we use femtosecond photon echo.Fluorescence—line—narrowing, spectral hole—burning and single molecule spectroscopy are methods of selective spectroscopy using zero-phonon lines (ZPL) to make selection in molecular ensemble. However if electron-phonon coupling is strong or sample temperature is near to room temperature, ZPL are absent and the optical band consists of electron-phonon transitions which are called phonon-side-band (PSB). In these cases the above mentioned methods of selective spectroscopy do not work. Can we get an information concerning a homogeneous optical band from inhomogeneously broadened bands in these cases? The answer is yes if we use femtosecond photon echo.

Spectral Hole-Burning and Related Spectroscopies: Science and ApplicationsJan 1, 19940 citations

Self-Pumped Phase Conjugation in Ti:Sapphire Slab Amplifiers

Ara Minassian, Graham J. Crofts, Michael J. Damzen

Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)Aug 25, 20050 citations

Theoretical Research on Zero-Phonon Line Pumped Yb∶YAG Slab Amplifier at Room-Temperature

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