Design of in-band pumped dysprosium-doped ZBLAN fiber amplifier for mid-IR wavelength range

Andrea Annunziato; Antonella Maria Loconsole; Vito Vincenzo Francione; Francesco Anelli; Luigi Ressa; Fedele Pisani; Gianluca Galzerano; Francesco Prudenzano

doi:10.1117/12.3017508

20 June 2024 Design of in-band pumped dysprosium-doped ZBLAN fiber amplifier for mid-IR wavelength range

Andrea Annunziato, Antonella Maria Loconsole, Vito Vincenzo Francione, Francesco Anelli, Luigi Ressa, Fedele Pisani, Gianluca Galzerano, Francesco Prudenzano

Author Affiliations +

Proceedings Volume 13003, Fiber Lasers and Glass Photonics: Materials through Applications IV; 1300308 (2024) https://doi.org/10.1117/12.3017508
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

In this paper, a fiber amplifier based on ZBLAN fiber doped with dysprosium is designed and optimized considering an in-band pumping scheme. The model is validated by comparing the simulated amplified spontaneous emission with the experimental curves reported in the literature. It allows to investigate the amplification of the signal of a continuous-wave fiber laser emitting in the wavelength range from 2.9 μm to 3.25 μm. The numerical analysis is carried out via home-made code that accurately takes into account the rate equations and the power propagation equations for the signal, pump, and amplified spontaneous emission. The finite element method (FEM) is used to calculate the modal overlap in the designed pump fiber combiner with the Dy³⁺-doped core. By employing an input pump power P_p = 5 W at the wavelength λ = 2.82 μm, a signal power P_s = 2 mW at the wavelength λ = 2.95 μm, a fiber length L = 3 m an amplifier output power of 0.5 W and an optical gain of about 24 dB are achieved. The obtained results are attractive for feasible innovative applications, e.g. the development of all-in-fiber systems. For instance, the pump and signal beams can be obtained via an Er:ZBLAN fiber laser and coupled with the dysprosium fiber through a single-mode fluoride coupler.

Conference Presentation

Citation Download Citation

Andrea Annunziato, Antonella Maria Loconsole, Vito Vincenzo Francione, Francesco Anelli, Luigi Ressa, Fedele Pisani, Gianluca Galzerano, and Francesco Prudenzano "Design of in-band pumped dysprosium-doped ZBLAN fiber amplifier for mid-IR wavelength range", Proc. SPIE 13003, Fiber Lasers and Glass Photonics: Materials through Applications IV, 1300308 (20 June 2024); https://doi.org/10.1117/12.3017508

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