Luminescence and relaxation processes in Er3+‐doped glass fibers

Autor:	T. Yagami, S. Shionoya, Y. Mita, T. Yoshida
Rok vydání:	1992
Předmět:	Photoluminescence Impurity Chemistry Excited state Relaxation (NMR) Radiative transfer Physics::Optics General Physics and Astronomy Mineralogy Light emission Fiber Luminescence Molecular physics
Zdroj:	Journal of Applied Physics. 71:938-941
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.351317
Popis:	Luminescence and related characteristics have been investigated for Er3+‐doped silica glass fibers and for fibers and bulk material of calcium metaphosphate glass. Special interest has been directed toward elucidating relaxation processes leading to 1.5‐μm light emission. Several emissions from higher excited states were investigated and excited‐state lifetimes were also measured. Approximate radiative and nonradiative transition probabilities have been obtained for the excited levels. These results have confirmed that dominant transitions populating the lowest excited level are step‐by‐step nonradiative relaxations and that only a limited amount of energy is supplied via intermediate radiative transitions. It has also been shown that the 1.5‐μm emission decay time constant elongates with increasing fiber length.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cab69a51378201b3f1811909b7fe2861 https://doi.org/10.1063/1.351317 Zobrazit plný text záznamu