Optical Properties of Tm, Mg:LiTaO₃ Laser Crystal¹

J. Gong^{a, b}, C. C. Zhao^{a, b}, J. G. Yin^{a, b}, P. C. Hu^{a, b}, X. M. He^a, and Y. Hang^a, *

^a Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics,
Chinese Academy of Sciences, Shanghai 201800, China

^b Graduate School of Chinese Academy of Sciences, Beijing 100039, China

*e-mail: yhang@siom.ac.cn

Received September 7, 2011; in final form, September 24, 2011; published online December 28, 2011

Abstract—A Tm, Mg co-doped LiTaO₃ crystal has been grown by Czochralski method. Room temperature
polarized absorption spectra and fluorescence spectrum of the Tm, Mg:LiTaO₃ crystal were measured and ana-
lyzed. The maximum absorption cross-section is 6.0791 10^–20 cm² at around 790 nm with full width at half
maximum of 5 nm. The emission cross-section of ³F₄ manifold was 2.2 10^–20 cm². The spectroscopic param-
eters of Tm³⁺ ion were calculated by applying the Judd–Ofelt approach, and the intensity parameters ₂, ₄,
and ₆ were obtained to be 7.71 10^–20, 1.09 10^–20, and 1.16 10^–20 cm², respectively. The branching ratios
and radiative lifetimes were also presented and the radiative lifetime of Tm^{3+ 3}F₄ ³H₆ transition is 968.3
s. The results were also analyzed and compared with other Tm³⁺ doped hosts.

DOI: 10.1134/S1054660X12020107

Pleiades Publishing home page | journal home page | top

If you have any problems with this server, contact webmaster.