Crystal growth and spectral analysis of Dy3+ and Er3+ doped KPb2Cl5 as a mid-infrared laser crystal.

This paper reports crystal growth and optical characteristics of dysprosium (Dy3+) and erbium (Er3+) doped mid-infrared laser crystal ternary-potassium-lead-chloride (KPb2Cl5). Two transparent crystals with good optical quality have been grown successfully by using the Bridgman technique,the largest crystal size reaches up to 10×60mm2. Measurements of X-ray diffraction(XRD) and absorption spectra were carried out. Based on Judd-Ofelt theory, the intensity parameters Ωt(t=2,4,6), the experimental and theoretical oscillator strengths have been obtained.The intensity parameters Ωt(t=2,4,6) of Er3+:KPb2Cl5 were calculated to be Ω2=5.10×10-20 cm2, Ω4=1.25×10-20 cm2, Ω6=0.83×10-20 cm2, and the values for Dy3+:KPb2Cl5 were calculated to be Ω2=6.26×10-20 cm2, Ω4=2.45×10-20 cm2, Ω6=0.04×10-20 cm2 respectively. (© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [ABSTRACT FROM AUTHOR]

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