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Experimental investigation and crystal-field modeling of Er3+ energy levels in GSGG crystal
|Jinyun Gao , Qingli Zhang , Dunlu Sun , Shaotang Yin|
Anhui Institute of Optics and Fine Mechanics, Chinese Academy Sciences, Hefei 230031, China
The Er3+-doped Gd3Sc2Ga3O12 (Er3+:GSGG) single crystal, a excellent medium of the mid-infrared and anti-radiation solid state laser pumped by laser diode, was grown by Czochralski method successfully. The absorption spectra was measured and analyzed in a wider spectral wavelength range of 350-1700 nm with different temperature points from low to room temperature (7.6 K, 77 K, 200 K and 300 K). The free-ions and crystal-field parameters were fitted to the experimental energy levels with the root mean square deviation of 8.69 cm-1. According to the crystal-field calculations, 52 Stark energy levels of Er3+ in GSGG host crystals were assigned. The fitting results of free-ions and crystal-field parameters were compared with those already reported of Er3+:YSGG. The results indicated that the free-ions parameters are similar to those of the Er3+ in GSGG and YSGG crystals, and the crystal-field interaction of GSGG is weaker than that of YSGG, which may result in the better laser characterization of Er3+:GSGG crystal.
Presentation: Poster at 17th International Conference on Crystal Growth and Epitaxy - ICCGE-17, Topical Session 6, by Jinyun Gao
See On-line Journal of 17th International Conference on Crystal Growth and Epitaxy - ICCGE-17
Submitted: 2013-04-15 05:16 Revised: 2013-04-15 05:21