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

Tatsuya Yamashita; Yasutake Ohishi

doi:10.1117/12.685507

2 October 2006 Spectroscopic properties of Tb³⁺-Yb³⁺-codoped borosilicate glasses for green lasers and amplifiers

Tatsuya Yamashita, Yasutake Ohishi

Proceedings Volume 6389, Active and Passive Optical Components for Communications VI; 638912 (2006) https://doi.org/10.1117/12.685507
Event: Optics East 2006, 2006, Boston, Massachusetts, United States

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 (λ_ex = 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.

Citation Download Citation

Tatsuya Yamashita and Yasutake Ohishi "Spectroscopic properties of Tb³⁺-Yb³⁺-codoped borosilicate glasses for green lasers and amplifiers", Proc. SPIE 6389, Active and Passive Optical Components for Communications VI, 638912 (2 October 2006); https://doi.org/10.1117/12.685507

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