Open AccessMicro-fluorescence lifetime and spectral imaging of ytterbium doped laser materials
Author(s) -
Sabu Thomas,
Stefan Kühn,
G. Feldkamp,
Anka Schwuchow,
Kay Schuster,
Sigrun Hein,
Ramona Eberhardt,
Andreas Tünnermann
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.032417
Subject(s) - photodarkening , materials science , optics , ytterbium , fluorescence , laser , doping , fiber laser , confocal , microscopy , laser induced fluorescence , microscope , optical fiber , optoelectronics , physics
We present the application of a confocal fluorescence microscope to the analysis of Yb-doped solid-state laser materials, with examples of Yb-doped crystals, photonic crystal fibers and fiber preforms made with different manufacturing processes. Beside the fluorescence lifetime image itself, a microscopic spectral fluorescence emission analysis is presented and spatially resolved emission cross sections are obtained. Doping concentration and its distributions and other laser optical parameters are measured, which help to analyze manufacturing steps. Further properties like photodarkening and saturation are addressed.