On the nature of CT luminescence in Yb3+:YAG single crystal under low photon energy

• DOI: 10.1016/j.optmat.2022.112548
• Publication Date: 2022-06-07T20:00:23Z
• Authors: Chaika Mykhailo; Sergii Ubizskii; Juraj Kajan; Tomas Gregor; Grigori Gamazyan; Lukasz Marciniak
• Keywords: Photodarkening; Crystal (programming language)

The charge transfer luminescence process has been extensively studied due to its influence on the optical properties of various phosphors such as photodarkening which is a limiting factor for lifetime high-power fiber lasers. In this work, we report CT in Yb3+:YAG single crystals at 3.3 eV excitation. It was found that caused by processes between Yb3+ ions and perturbed F+ centers formed during crystal growth incorporation some portion Y3+ into Al3+ sites. systems can be produced low photon energies equal excitation, with Stokes shift less than 500 cm−1.