Infrared (1.2–1.6μm) luminescence in Yb, Cr:YAG with 940nm diode pumping

Authors :: Xu, Xiaodong
Zhao, Zhiwei
Song, Pingxin
Zhou, Guoqing
Xu, Jun
Deng, Peizhen
Source :: Materials Science & Engineering: B. Feb2005, Vol. 117 Issue 1, p17-20. 4p.
Publication Year :: 2005
Abstract: Abstract: Infrared (1.2–1.6μm) luminescence in a yttrium aluminium garnet (YAG) crystal, co-doped with Yb (10 at.%) and Cr (0.05 at.%) ions, was investigated under CW laser diode pumping (λ =940nm). The Cr4+ emission band was observed with its peak at 1.35μm and measured to be about 6% with respect to Yb3+ IR luminescence (λ =1.03μm). Analysis of the crystal absorption and luminescence spectra allows one to conclude that Yb3+–Cr4+ energy transfer is a mechanism responsible for the 3B2(3T2)–3B1(3A2) emission of Cr4+ ions. This crystal is promising as an efficient source of the near infrared emission. [Copyright &y& Elsevier]