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Title: Optical properties and energy transfer processes of Ho{sup 3+}/Er{sup 3+}- codoped fluorotellurite glass under 1550 nm excitation for 2.0 μm applications

This paper investigates 2.0 μm emission properties and energy transfer processes in the Er{sup 3+}/Ho{sup 3+} codoped fluorotellurite glass. The measured absorption spectra demonstrate that the codoped sample can be pumped by 1550 nm excitation efficiently. Judd-Ofelt and radiative parameters are calculated and discussed. Intensive 2.0 μm emission originating from Ho{sup 3+}: {sup 5}I{sub 7}→{sup 5}I{sub 8} transition is observed and a long lifetime (11 ms) of the {sup 5}I{sub 7} level is measured when Ho{sup 3+} ions are sensitized by Er{sup 3+} ions. Meanwhile, the upconversion spectra of the Er{sup 3+} singly and codoped samples are obtained and the energy transfer processes of the two ions is discussed based on the change of the upconversion emissions. The microscopic interaction parameters of the phonon-assisted (Er{sup 3+}: {sup 4}I{sub 13/2}→Ho{sup 3+}:{sup 5}I{sub 7}) process are calculated and the microparameter reaches as high as 10.1 × 10{sup −41} cm{sup 6}/s. Hence, these results indicate that this Ho{sup 3+}/Er{sup 3+} codoped fluorotellurite glass will be a suitable material for developing solid state laser around 2.0 μm.
Authors:
;  [1] ;  [2] ; ;  [1]
  1. Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800 (China)
  2. (China)
Publication Date:
OSTI Identifier:
22308459
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 3; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION SPECTRA; EMISSION; ENERGY TRANSFER; ERBIUM ADDITIONS; EXCITATION; FLUORINE COMPOUNDS; GLASS; HOLMIUM ADDITIONS; INTERACTIONS; LIFETIME; OPTICAL PROPERTIES; OPTICAL PUMPING; PHONONS; SOLID STATE LASERS; TELLURIUM COMPOUNDS