Exploring the 3-micron mid-infrared laser potential of Dy:BaF2

Zackery D. Fleischman; Ei E. Brown; Mark Dubinskii; Jenny Rosen

doi:10.1117/12.2587772

5 March 2021 Exploring the 3-micron mid-infrared laser potential of Dy:BaF₂

Zackery D. Fleischman, Ei E. Brown, Mark Dubinskii, Jenny Rosen

Proceedings Volume 11682, Optical Components and Materials XVIII; 116820N (2021) https://doi.org/10.1117/12.2587772
Event: SPIE OPTO, 2021, Online Only

Abstract

In the pursuit of new mid-IR laser gain materials, dysprosium-doped barium fluoride was evaluated for its potential laser emission in the 3-μm spectral region. Comprehensive spectroscopic characterization was performed, including absorption, fluorescence, and decay-time measurements. Efforts to determine the discrete Stark splittings of various Dy3+ manifolds in this host material were hampered by apparent multisite behavior of the RE dopant. Laser-relevant parameters such as absorption and stimulated-emission cross sections, quantum-efficiencies, and radiative lifetimes were determined for room temperature (300 K) and cryogenic temperature (77 K). The gain cross sections, which predict overall laser performance, were also calculated. Room-temperature laser operation of the 3-μm transition would suffer from low quantum efficiency and would require a high population inversion of approximately 40%. The parameters at 77 K show improvement across the board with multiple-times-higher cross-section intensities, nearly 4× higher quantum efficiency, and a positive gain cross section requiring less than 20% population inversion.

Conference Presentation

Citation Download Citation

Zackery D. Fleischman, Ei E. Brown, Mark Dubinskii, and Jenny Rosen "Exploring the 3-micron mid-infrared laser potential of Dy:BaF₂", Proc. SPIE 11682, Optical Components and Materials XVIII, 116820N (5 March 2021); https://doi.org/10.1117/12.2587772

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