Optical Studies on Rare Earth Lasting Materials

S.P. Tandon; Y.K. Sharma; N.B. Bishnoi; K. Tandon

doi:10.14429/dsj.47.4004

S.P. Tandon J.N.V: University, Jodhpur.
Y.K. Sharma J.N.V: University, Jodhpur.
N.B. Bishnoi J.N.V: University, Jodhpur .
K. Tandon J.N.V: University, Jodhpur .

DOI: https://doi.org/10.14429/dsj.47.4004

Keywords: Stimulated emission cross-section, Fluorescence branching ratio, Doped glasses, Melt quenching technique, Phosphate glass, Neodymium doped borate glasses

Abstract

Neodymium-doped borate and phosphate glass specimens have been prepared by melt-quenching technique. Their absorption spectra have been recorded in the region 400 -900 nm. From observed absorption spectra,Judd Ofelt (J0), Omega/sub t/, parameters (t = 2, 4 and 6) have been computed. They have been used to calculate the laser parameters, viz., spontaneous emission probability (A), fluorescence branching ratio (Beeta) and stimulated emission cross-section (Sigma). They exhibit the suitability of the present glass specimen for laser action. The effects of composition and concentration of the dopant on these parameters have been discussed. A comparative study of stimulated emission cross-section of different types of doped glasses has also been made.

Author Biographies

S.P. Tandon, J.N.V: University, Jodhpur.

Prof SP Tandon obtained his PhD from Agra University in 1964. He has Published 190 research papers on molecular and lanthanide spectroscopy, LCAO-MO calculations, materials science and laser physics. He visited and worked at universities in Dortmund and Gotin~en (West Germany), Trolllheim (Norway), Upsala (Sweden), Paris and Strassburg (France), Zurich (Switzerland), International Centre for Theoretical Physics (Italy). He also worked as educational expert to Government of Iraq (University of Sulaimaniyah).

Y.K. Sharma, J.N.V: University, Jodhpur.

YK Sharma is working as Assistant Professor of Physics of JNV University, Jodhpur. He obtained his PhD from University of Jodhpur in 1991. He has ,published 40 papers on lanthanide spectroscopy and laser m'aterials. He has worked as Research Fellow for Aeronautica, Research & Development Board projects, He was awarded Young Scientist Pioject on study anddevelopment of lanthanide doped glasses for laser and LSC's ( 1991-1994) by Government of India, Department c of Science and Technology, New Delhi.

N.B. Bishnoi, J.N.V: University, Jodhpur .

Dr NB Bishnol is working as Lecturer in Physics. Government Nehru Degree College, Jhajhar. He obtained his PhD from University of Jodhpur in 1991. He has published 25 papers on lanthanide spectroscopy and laser materials. He has worked as Research Fellow for Aeronautical research & Development Board projects.

K. Tandon, J.N.V: University, Jodhpur .

Dr (Mrs) K Tandon is Associate Professor of Chemistry at JNV University, Jodhpur. She obtained her PhD from University of Jodhpur in 1967. She has published 60 research papers on cordination chemistry, isotopic substitution and laser materials. Sh; visited and worked at universities of Dortmund and Gotingen (West Germany), Tronheim (Norway), Upsala (Sweden), Paris and Strassburg (France), Zurich (Switzerland) and. International Centre fqr Theortical Physics (Italy).