Optical Parameters of NaY(WO4)2 Crystals Doped with Pr and Ho

• Published in: Crystal research and technology (1979) Vol. 36; no. 4-5; pp. 449 - 455
• Main Authors: Cheng, Zh.X., Zhang, Sh.J., Han, J.R., Chen, H.Ch, Lu, Q.M., Guo, H.C.
• Format: Journal Article
• Language: English
• Published: Berlin WILEY-VCH Verlag Berlin GmbH 01.06.2001; WILEY‐VCH Verlag Berlin GmbH; Wiley-VCH
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Ho3+ ions; Infrared and raman spectra and scattering; Judd-Ofelt theory; Laser materials; NaY(WO4)2 crystal; Optical materials; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optics; Other nonmetallic inorganics; Other nonmetals; Physics; Pr3; Stimulated emission; Visible and ultraviolet spectra; Radiative transition; Inorganic compounds; Yttrium tungstates; Holmium additions; Transition element compounds; Doped materials; Laser materials; Experimental study; Judd Ofelt effect; Phenomenology; Spontaneous emission; Stimulated emission; Praseodymium additions; Oscillator strengths; Sodium tungstates; Absorption spectra; Quaternary compounds
• ISSN: 0232-1300; 1521-4079
• DOI: 10.1002/1521-4079(200106)36:4/5<449::AID-CRAT449>3.0.CO;2-E

Rare‐earths (Pr, Ho) doped double tungstates NaY(WO4)2 crystals were prepared by using Czochralski (CZ) pulling method. Their absorption spectra have been measured in the region 300‐2000nm at room temperature. A band gap of eigentransition of 3.92eV was obtained. The three phenomenological parameters were calculated through fitting of the calculated and measured oscillator strengths. J‐O theory was used to evaluate the spontaneous emission probabilities, stimulated emission cross sections, branch ratios and energy level lifetimes of some useful transitions of Ho3+ ions in NaY(WO4)2 crystals. The obtained three phenomenological J‐O intensity parameters Ω1 are Ω2=2.17×10‐19, Ω4=1.58×10‐19, Ω6=3.24×10‐20 for Pr3+; Ω2=1.64×10‐19, Ω4=7.43×10‐20, Ω6=1.60×10‐20 for Ho3+.