Avalanche upconversion in Tm3+-doped BIGaZYTZr glass

Autor:	Bernard Jacquier, Stephan Guy, M.F. Joubert, C. Linares, Jean-Luc Adam
Rok vydání:	1995
Předmět:	Absorption spectroscopy Chemistry business.industry Infrared Doping Relaxation (NMR) Condensed Matter Physics Photon upconversion Electronic Optical and Magnetic Materials Wavelength Optics Materials Chemistry Ceramics and Composites Radiative transfer Atomic physics business Excitation
Zdroj:	Journal of Non-Crystalline Solids. 184:98-102
ISSN:	0022-3093
Popis:	Intense blue fluorescence is observed in a Tm3+-doped BIGaZYTZr fluoride glass after single wavelength red or infrared CW pumping. Dynamics and power dependences of both1G4 and1D2 fluorescences under 648.7 nm excitation reveal a photon avalanche mechanism in the 3 mol% doped sample. Selective pulsed excitation indicate an almost purely radiative relaxation at low concentration in agreement with Judd-Ofelt calculations. At higher concentration, cross-relaxation energy transfer and excited state absorption mechanism compete to feed the1G4 and1D2 levels. The concentration, temperature and time dependences of these fluorescences are investigated.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2a7904f4105de59c31c0decf72becf12 https://doi.org/10.1016/0022-3093(95)00090-9 Zobrazit plný text záznamu Full Text from ScienceDirect