MgO-codoping effects on the spectroscopic properties of Er3+-doped LiNbO3

Autor:	Tian-Quan Lü, Ai-Hua Li, Liang Sun, Wenzhi Wu, Zhi-Ren Zheng, Qiang Lü, Yanqiang Yang, Weilong Liu
Rok vydání:	2008
Předmět:	Erbium Materials science Absorption spectroscopy chemistry Doping Analytical chemistry General Physics and Astronomy chemistry.chemical_element Absorption (electromagnetic radiation) Fluorescence Photon upconversion Spectral line Ion
Zdroj:	Journal of Applied Physics. 104:033511
ISSN:	1089-7550 0021-8979
Popis:	Optical absorption, spectrally resolved polarized upconversion fluorescence, and time-resolved luminescence spectra are used to investigate the Er3+ spectroscopic properties in a series of congruent LiNbO3 crystals codoped with Er3+ (1 mol %) and MgO (X mol %, X=0, 2, 4, 6, and 8). The absorption spectra indicate that the transition cross section of Er3+ ions decreases with increasing MgO concentration; it is explained as the improvement of the Er3+-site symmetries. A new Er3+ energy site with low energy, which appears in the long wavelength side of the polarized fluorescence spectra for the samples heavily codoped with MgO, is demonstrated in the time-resolved luminescence spectra. An important finding is that mild codoping with MgO clearly does not facilitate the formation of clustered sites, whereas heavy codoping clearly does facilitate it in Er3+-doped LiNbO3 crystals. These results are important to those who consider the material as a 1.5 μm laser or fiber optical cable.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::bb465c0c0f06b8f98c9b2532af6db749 https://doi.org/10.1063/1.2957060 Zobrazit plný text záznamu