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Spectral analysis of Pr3+ & Tm3+ ions doped fluoro- phospho - borate glasses

B. SUDHAKAR REDDY1,* , S. BUDDHUDU2, S. R. K. RAO3, P. NARESH BABU3

Affiliation

  1. Department of Physics, Sri Venkateswara Degree College ,Kadapa-516003, India
  2. Department of Physics, Sri Venkateswara University, Tirupati-517502, India
  3. Department of Physics, Indian Institute of Science, Bangalore - 560 012, India

Abstract

Optical analysis of (0.2mol %) Pr3+&Tm3+ ions doped fluoro-phospho-borate glasses have been reported in the following glass compositions: 69.8 B2O3 – 10 P2O5 – 10(ZnO/CdO/TeO2) – 10 AlF3 /10LiF Measured absorption spectra of Pr3+: fluoro-phospho-borate glasses have shown eight absorption bands at 443, 469, 481, 589 , 1008, 1419, 1523 and 1930 nm which correspond to the transitions 3H4 􀃆3P2, 3P1, 3P0, 1D2, 1G4, 3F4, 3F3 and 3F2 respectively. Absorption spectra of Tm3+: glasses have revealed five absorption bands at 466, 685, 790, 1206 and 1644 nm which belong to the transitions 3H6􀃆1G4, 3F3, 3H4, 3H5 and 3F4 respectively. Pr3+: glasses, with an excitation at 442nm (3H4 􀃆3P2), a orange-red emission at 600 nm (1D2􀃆 3H4) has been observed. In the case of Tm3+: glasses, upon excitation with 355nm (3H6􀃆1D2), blue emissions at 452 nm (1D2􀃆3F4) and at 476 nm (1G4􀃆3H6) are observed. From the measured NIR emission spectra of Pr3+: fluoro-phosphoborate glasses, an NIR emission at 1354nm (1G4􀃆3H5) and form Tm3+: glasses, an NIR emission (3F4􀃆3H6) at 1809 nm are observed with an Ar+ laser (514.5 nm) as the excitation source..

Keywords

Pr3+ and Tm3+, Glasses, Spectral analysis, B2O3 – P2O3 – ZnO CdO TeO2-AlF3 glasses.

Submitted at: Aug. 2, 2008
Accepted at: Oct. 7, 2008

Citation

B. SUDHAKAR REDDY, S. BUDDHUDU, S. R. K. RAO, P. NARESH BABU, Spectral analysis of Pr3+ & Tm3+ ions doped fluoro- phospho - borate glasses, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 10, pp. 2771-2776 (2008)