Wittrock, Ulrich
Refine
Year
Publication Type
- Article (18) (remove)
Language
- English (15)
- German (2)
- Multiple languages (1)
Keywords
- deformable mirrors (2)
- laser machining (2)
- Active or adaptive optics (1)
- Photoluminescence (1)
- Pr3+ luminescence (1)
- Single crystal (1)
- Space instrumentation (1)
- Space optics (1)
- Telescopes (1)
- Temperature-dependent spectroscopy (1)
Faculty
This work deals with the spectroscopic properties of praseodymium doped single crystalline lutetium aluminum garnet (LuAG:Pr3+). A special focus was set on temperature- and time-dependent spectroscopy. Beyond the well-known down-conversion luminescence of LuAG:Pr3+, also UV-A/B up-conversion luminescence under excitation with a 488 nm laser was thoroughly investigated. Furthermore, the results of the spectroscopic investigations on the single crystalline material were supplemented and compared with measurements on a microscale powder sample.
In addition, to the spectroscopic investigations, mechanistic considerations are presented to obtain a closer look at the up-conversion process in LuAG:Pr3+. We promote the thesis of a temperature-dependent energy transfer up-conversion mechanism.