| || Optical Studies on Rare Earth Lasting Materials
Author : Tandon, K. ;Bishnoi, N.B.;Sharma, Y.K.;Tandon, S.P.
Source : Defence Science Journal ; Vol:47(2) ; 1997 ; pp 225-238
Subject : 535 Optics
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.