Optical properties of Nd3+-doped La2CaB10O19 crystals with different Nd3+ concentrations

✍ Scribed by Yang Wu; Jianxiu Zhang; Guochun Zhang; Peizhen Fu; Yicheng Wu

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 307 KB
• Volume: 318
• Category: Article
• ISSN: 0022-0248
• DOI: 10.1016/j.jcrysgro.2010.11.010

✦ Synopsis

La 2 CaB 10 O 19 (LCB) is a new NLO crystal, in which Nd 3 + can be doped with different concentrations to be self-frequency doubling crystals. We obtained seven LCB crystals with different Nd 3 + concentrations grown by flux method. Refractive indices, absorption spectra and fluorescence spectra of the seven LCB crystals with various Nd 3 + doping concentrations have been measured and evaluated. It has been found that the 5 mol% Nd doped LCB crystal is most appropriate to be a laser material, by fitting the absorption spectrum with the Judd-Ofelt theory, radiative lifetime t r of Nd 3 + in the 5 mol% Nd doped LCB crystal is determined to be 237.8 ms. For the 5 mol% Nd doped LCB crystal, the absorption cross section at 799 nm and the emission cross section at 1050 nm are 4.52 Â 10 À 20 and 1.29 Â 10 À 19 cm 2 , respectively. The measured fluorescence lifetime t f of the 5 mol% Nd doped LCB crystal is 85 ms and its quantum efficiency is 35.7%.