Effect of ZnO-HfO2 hybrid nanocrystals on amplified spontaneous emission in Eu-doped ternary glass-ceramic waveguides

Subhabrata Ghosh; Shivakiran N. B. Bhaktha

doi:10.1117/12.2315068

17 May 2018 Effect of ZnO-HfO₂ hybrid nanocrystals on amplified spontaneous emission in Eu-doped ternary glass-ceramic waveguides

Subhabrata Ghosh, Shivakiran N. B. Bhaktha

Author Affiliations +

Proceedings Volume 10683, Fiber Lasers and Glass Photonics: Materials through Applications; 106833N (2018) https://doi.org/10.1117/12.2315068
Event: SPIE Photonics Europe, 2018, Strasbourg, France

Abstract

We discuss the fabrication of 1 mol% Eu-doped 70 SiO₂–(30-x) HfO₂–x ZnO (x = 0, 2, 5 and 7 mol%) ternary glass-ceramic waveguides, and the effect of ZnO–HfO₂ hybrid nanocrystals on the optical gain in Eu-doped ternary waveguides. Formation and growth of ZnO–HfO₂hybrid nanocrystals have been observed in the TEM images with increase of ZnO concentration in the samples. Waveguiding properties of Eu-doped ternary waveguides were measured using lab-built prism-coupling technique. Propagation losses of the waveguides were measured using photometric detection technique and found to be between (0.3 to 0.6)±0.2 dB/cm. We have further investigated the optical amplification of red emission line (⁵D₀ → ⁷F₂) of Eu-ions in these waveguides using the variable stripe length method wherein the waveguides were pumped by continuous wave 532 nm laser in a stripe-like geometry using cylindrical lens The optical gain coefficients are found to be 5.3, 4.8, 3.7 and 0.1 cm⁻¹ for ZnO concentration of 0, 2, 5 and 7 mol% respectively.

Citation Download Citation

Subhabrata Ghosh and Shivakiran N. B. Bhaktha "Effect of ZnO-HfO₂ hybrid nanocrystals on amplified spontaneous emission in Eu-doped ternary glass-ceramic waveguides", Proc. SPIE 10683, Fiber Lasers and Glass Photonics: Materials through Applications, 106833N (17 May 2018); https://doi.org/10.1117/12.2315068

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