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

Yasutake Ohishi; Tatsuya Yamashita; Takenobu Suzuki

doi:10.1117/12.808701

6 February 2009 Spectroscopic properties of Tb³⁺-doped borosilicate glasses for new green laser media

Yasutake Ohishi, Tatsuya Yamashita, Takenobu Suzuki

Proceedings Volume 7212, Optical Components and Materials VI; 721219 (2009) https://doi.org/10.1117/12.808701
Event: SPIE OPTO: Integrated Optoelectronic Devices, 2009, San Jose, California, United States

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 ⁵D₄ → ⁷F₅ transition was 8.1 × 10^-22cm² 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

Citation Download Citation

Yasutake Ohishi, Tatsuya Yamashita, and Takenobu Suzuki "Spectroscopic properties of Tb³⁺-doped borosilicate glasses for new green laser media", Proc. SPIE 7212, Optical Components and Materials VI, 721219 (6 February 2009); https://doi.org/10.1117/12.808701

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