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Proceedings Paper

Spectroscopic properties of Tb3+-Yb3+-codoped borosilicate glasses for green lasers and amplifiers
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Paper Abstract

Visible fiber lasers and amplifiers have potential applications in the fields of optical data storage, spectroscopy, biomedical, and optical local area networks. A spectroscopic analysis has been performed on a borosilicate glass, codoped with Tb3+ and Yb3+, to assess this material as a green laser and amplifier medium. The rare-earth ion concentration effect on thermal, absorption, and emission properties of the glasses were investigated using differential scanning calorimetry, UV/VIS/NIR absorption, and luminescence measurements, respectively. These materials were found to have good glass-forming ability, and show a high thermal stability, indicating the potential to facilitate low-loss fiber fabrication. Judd-Oflet analysis was performed for Tb3+ doped in the borosilicate glasses. The radiative lifetime of the 5D4 level was found to be 2.6 ms, and was almost constant in 0.5-15 wt.% concentration range. The peak cross section for stimulated emission by the 5D4->7F5 transition was found to be 0.8×10-21 cm2 at λ = 542 nm. In the Tb3+-Yb3+-codoped glasses, the green emission resulting from the cooperative energy transfer between doped ions was observed under infrared excitation (λex = 0.98 μm). This upconversion emission increased with doping ion concentration. These results suggested that the Tb3+-Yb3+-codoped borosilicate glass is a promising candidate for an all-solid-state upconversion green laser and amplifier.

Paper Details

Date Published: 2 October 2006
PDF: 11 pages
Proc. SPIE 6389, Active and Passive Optical Components for Communications VI, 638912 (2 October 2006); doi: 10.1117/12.685507
Show Author Affiliations
Tatsuya Yamashita, Toyota Technological Institute (Japan)
Toyota Central R&D Labs., Inc. (Japan)
Yasutake Ohishi, Toyota Technological Institute (Japan)

Published in SPIE Proceedings Vol. 6389:
Active and Passive Optical Components for Communications VI
Achyut K. Dutta; Yasutake Ohishi; Niloy K. Dutta; Jesper Moerk, Editor(s)

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