Three kinds of Yb3+- and Na+-codoped CaF2 laser crystal with different Na:Yb ratios of 0, 1.5, and 10 are grown by the temperature gradient technique. Room-temperature absorption, photoluminescence spectra, and fluorescence lifetimes belonging to the transitions between ground state ²F_7/2 and excited state ²F_5/2 of Yb3+ ions in the three crystals are measured to study the effect of Na+. Experimental results show that codoping Na+ ions in different Na:Yb ratios can modulate the spectroscopy and photoluminescence properties of Yb3+ ions in a CaF2 lattice in a large scope.
© 2005 Optical Society of America
(140.3380) Lasers and laser optics : Laser materials
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.5680) Lasers and laser optics : Rare earth and transition metal solid-state lasers
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence
Liangbi Su, Jun Xu, Hongjun Li, Weiqiao Yang, Zhiwei Zhao, Jiliang Si, Yongjun Dong, and Guoqing Zhou, "Codoping Na+ to modulate the spectroscopy and photoluminescence properties of Yb3+ in CaF2 laser crystal," Opt. Lett. 30, 1003-1005 (2005)