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Proceedings Paper

Spectroscopic properties of Tb3+-doped borosilicate glasses for new green laser media
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Paper Abstract

The spectroscopic properties of Tb3+-doped borosilicate glasses are investigated to assess their potential as gain media in the 0.54 μm band. Analysis of the concentration and temperature dependences of the optical transitions from the 5D4 level of Tb3+ is carried out. The emission lifetime of the 5D4 level at 300 K is found to be 2.61 ± 0.03 ms, and almost invariant for Tb3+ concentrations less than 15 wt% (1.68×1021 ions/cm3). Judd-Ofelt analysis is used to calculate the emission transition probabilities from the 5D4 level and the emission cross section at 300 K for the 5D47F5 transition was 8.1 × 10-22 cm2 at 541 nm. Temperature dependent non-radiative relaxation of the 5D4 level is observed in samples with 5 and 20 wt% Tb3+. The quenching process of the 5D4 level in the temperature range of 50 ~ 373 K is thought to be caused by a two-photon one-site resonant process, whereas it is dominated by a two-site non-resonant process at temperatures below 40 K. Our results indicate that Tb3+-doped borosilicate glass is a promising candidate for optical gain media in the green (0.54 μm) band

Paper Details

Date Published: 6 February 2009
PDF: 12 pages
Proc. SPIE 7212, Optical Components and Materials VI, 721219 (6 February 2009); doi: 10.1117/12.808701
Show Author Affiliations
Yasutake Ohishi, Toyota Technological Institute (Japan)
Tatsuya Yamashita, Toyota Technological Institute (Japan)
Toyota Central R&D Labs., Inc. (Japan)
Takenobu Suzuki, Toyota Technological Institute (Japan)

Published in SPIE Proceedings Vol. 7212:
Optical Components and Materials VI
Shibin Jiang; Michel J. F. Digonnet; John W. Glesener; J. Christopher Dries, Editor(s)

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