Dy ~ (3) doped GeS_2 base properties of chalcogenide glass

Title: Dy ~ (3) doped GeS_2 base properties of chalcogenide glass
Author: Liu Lei
Degree-granting unit: Changchun University of Technology
Keywords: mid-infrared laser;; energy transfer;; radiative transition;; phonon energy
Summary:
Mid-infrared laser as in the civilian and military aspects of the important applications, has been more and more people's attention. Chalcogenide glass as a low phonon energy, wide infrared transmission window, the higher refractive index, good chemical stability and thermal stability of the advantages, so it is more appropriate mid-infrared laser matrix glass. Chalcogenide glass to improve some of the radiative transition probability of rare earth ions, reducing the multi-phonon relaxation rate, which can be observed in a number of oxide glass is usually a new quenching of fluorescence emission.
Dy ~ (3) In addition to a very important Neodymium Magnets near-infrared wavelength 1.31μm emission, but also has two important mid-infrared fluorescent output, respectively, 2.9μm (~ 6H_ (13 / 2) → ~ 6H_ (15 / 2)) and 4.3μm (~ 6H_ (11 / 2) → ~ 6H_ (13 / 2)). In the absence of a suitable pump source and Dy ~ (3) the larger the level of non-radiative transition between the probability of fluorescence intensity of these two very small. Tm ~ (3) of ~ 3H_4 level can efficiently absorb the 808nm pump light, and Tm ~ (3) and Dy ~ (3) exists between the efficiency of energy transfer, so the co-doped Tm ~ (3) the can effectively solve this problem.
Ge-Ga-S-CdS glass due to higher http://www.everbeenmagnet.com/en/products/110-sintered-neodymium-magnets rare earth solubility, it is more appropriate matrix glass. This article in the glass system for the Tm ~ (3), Dy ~ (3) mechanism of energy transfer.
Through the adjustment of the glass composition, the glass can effectively reduce the phonon energy and electron - phonon coupling strength, thereby increasing the excitation intensity of rare earth ions. Based on the Ge-Ga-S-CdI_2 glass composition adjustment, study CdI_2 of Dy ~ (3) optical properties.
Degree Year: 2010