Broadband NIR luminescence in double-core germanate optical fiber

Marcin Kochanowicz; Karolina Sadowska; Krzysztof Markowski; Jacek M. Zmojda; Piotr Miluski; Agata Baranowska; Marta Kuwik; Magdalena Lesniak; Joanna Pisarska; Wojciech A. Pisarski; Jan Dorosz; Dominik Dorosz

doi:10.1117/12.2621341

25 May 2022 Broadband NIR luminescence in double-core germanate optical fiber

Marcin Kochanowicz, Karolina Sadowska, Krzysztof Markowski, Jacek M. Zmojda, Piotr Miluski, Agata Baranowska, Marta Kuwik, Magdalena Lesniak, Joanna Pisarska, Wojciech A. Pisarski, Jan Dorosz, Dominik Dorosz

Author Affiliations +

Proceedings Volume 12142, Fiber Lasers and Glass Photonics: Materials through Applications III; 121420X (2022) https://doi.org/10.1117/12.2621341
Event: SPIE Photonics Europe, 2022, Strasbourg, France

Abstract

In the paper, 1.4 – 2.2 μm broadband emission under 796, 808, 980 nm laser diode excitation in low phonon energy germanate glass system co-doped with 0.7Er₂O₃/0.35Tmo₂O₃ (1st core) and 0.7Tm₂O₃/0.15Ho₂O₃ (2nd core) were investigated. Next, double-core, double-clad optical fiber has been developed by the modified rod-in-tube technique. Amplified spontaneous emission (ASE) in double-clad optical fiber with 3dB bandwidth was measured to be 346 nm and 677 nm for - 10 dB. ASE spectrum is a result of the partial donor-acceptor energy transfer and superposition of Er³⁺: 4I_13/2 → 4I_13/2, Tm³⁺: ³F₄ → ³H₆, 1.8 μm and (Ho^3+:5I₇ → ⁵I₈) 2 μm emission bands. Excellent spectroscopic properties indicate that the developed germanate optical fiber is a promising active element for construction compact, broadband ASE sources.

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Marcin Kochanowicz, Karolina Sadowska, Krzysztof Markowski, Jacek M. Zmojda, Piotr Miluski, Agata Baranowska, Marta Kuwik, Magdalena Lesniak, Joanna Pisarska, Wojciech A. Pisarski, Jan Dorosz, and Dominik Dorosz "Broadband NIR luminescence in double-core germanate optical fiber", Proc. SPIE 12142, Fiber Lasers and Glass Photonics: Materials through Applications III, 121420X (25 May 2022); https://doi.org/10.1117/12.2621341

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