UV-Blue Upconverted Emission from Nd3+-Doped InF3-Based Heavy-Metal Fluoride Glasses for Blue Upconversion Fibre Laser
ZHANG Qin-Yuan1,2, YANG Gang-Feng1, S. Buddhudu1, JIANG Zhong-Hong1,3
1Key Laboratory of Special Functional Materials of Ministry of Education and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510640
2Photonics Research Centre, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798
3Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
UV-Blue Upconverted Emission from Nd3+-Doped InF3-Based Heavy-Metal Fluoride Glasses for Blue Upconversion Fibre Laser
1Key Laboratory of Special Functional Materials of Ministry of Education and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510640
2Photonics Research Centre, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798
3Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
Abstract： We report spectral properties and thermal stability of Nd3+-doped InF3-based heavy-metal fluoride glasses. Fluoroindate glasses in the chemical compositions (in mol%) of (38-x)InF3-16BaF2-20ZnF2-20SrF2-3GdF3-1GaF3-2NaF- xNdF3 (x= 0.1, 0.5, 1, 2, 3) have been prepared under a controlled atmosphere in a dry box. Strong UV--blue upconversion emission from a green excitation wavelength has been observed and the involved mechanisms have been explained. Near-infrared emission occurs simultaneously upon excitation of the UV--blue upconversion emissions with a cw Ar+ laser. The upconversion spectra have revealed four dominant emissions at 354, 380, 412 and 449nm, which belong to the transitions of 43/2 → 4I9/2, 4D3/2 → 4I11/2 and 2P3/2 → 4I9/2,4D3/2 → 4I13/2 and 2P3/2 → 4I11/2, 4D3/2 → 4I15/2 and 2P3/2 → 4I13/2, respectively.
2005, Vol. 22 
