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STUDIES ON THE GROWTH AND OPTICAL CHARACTERIZATION OF DYSPROSIUM PRASEODYMIUM OXALATE SINGLE CRYSTALS

V. Thomas1, Anit Elizebeth2, H. Thomas1, G. Jose2, N. V. Unnikrishnan2,* , Cyriac Joseph2, M. A. Ittyachen2

Affiliation

  1. Department of Physics, Christian College, Chengannur- 689 122, India
  2. School of Pure and Applied Physics, Mahatma Gandhi University, Kottayam-686 560, India

Abstract

Preparation and optical characterization of dysprosium praseodymium oxalate (DPO) single crystals is reported. The crystals were grown by silica gel technique, by the controlled reaction of rare earth nitrates with oxalic acid. Crystals were characterized using X-ray powder diffraction, optical absorption and fluorescence studies. Radiative transition probability, fluorescence branching ratio and radiative lifetime of Dy3+ in the crystal are evaluated by the parameterization of the absorption spectrum by the Judd-Ofelt theory. The recorded fluorescence spectrum showed two well resolved peaks at 480 nm and 571 nm and are assigned to the transitions from 4F9/2fi6H15/2 and 6H13/2 of Dy3+. Stimulated emission crossection and optical gain of these transitions are also evaluated..

Keywords

Dy, Pr oxalate, Single crystal, Stimulated emission cross-section.

Submitted at: Aug. 6, 2005
Accepted at: Sept. 22, 2005

Citation

V. Thomas, Anit Elizebeth, H. Thomas, G. Jose, N. V. Unnikrishnan, Cyriac Joseph, M. A. Ittyachen, STUDIES ON THE GROWTH AND OPTICAL CHARACTERIZATION OF DYSPROSIUM PRASEODYMIUM OXALATE SINGLE CRYSTALS, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 5, pp. 2687-2692 (2005)