Journal
JOURNAL OF CONTEMPORARY PHYSICS-ARMENIAN ACADEMY OF SCIENCES
Volume 55, Issue 2, Pages 131-136Publisher
ALLERTON PRESS INC
DOI: 10.3103/S1068337220020115
Keywords
Perovskite laser materials; crystal growth; color centers; lifetime of Yb3+
Categories
Funding
- State Science Committee of Republic of Armenia [18BL-015]
- Belarusian Republican Foundation for Fundamental Research [F19ARM-006]
Ask authors/readers for more resources
Single crystals of yttrium orthoaluminate activated with Yb(3+)ions (YAlO3:Yb) are of high interest for diode pumped high-power ultrafast lasers emitting in the spectral range around 1 mu m. The major parameters of lasers achieved so far can be improved by optimizing the activator concentration and improvement of the structural and optical quality of crystals. One of the problems is occurrence of color centers giving rise to absorption bands in the visible range with tails extending to the near IR. In the present work single crystals of YAlO3:Yb were grown by the Bridgman and Czochralski methods. It is found that under the applied growth conditions absorption associated with color centers in the visible range is much lower in YAlO3:Yb crystals grown by the Bridgman method. The differences in optical quality are attributed to the growth atmosphere (Ar/H(2)for Bridgman and Ar in the case of Czochralski), and to crystal cooling conditions. The influence of gamma-ray irradiation and thermal annealing on optical absorption in YAlO3:Yb grown by the two methods is studied. The lifetime of Yb(3+)is measured in crystals grown by the two methods.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available