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30 May 2022 Spectroscopic investigation of rare-earth doped CsCdCl3 crystals for potential mid-IR (3-5 um) laser sources
Ei E. Brown, Zackery Fleischman, Jason McKay, Amin Kabir, Uwe Hommerich, Sudhir Trivedi, Mark Dubinskii
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Proceedings Volume PC12092, Laser Technology for Defense and Security XVII; PC1209203 (2022) https://doi.org/10.1117/12.2621892
Event: SPIE Defense + Commercial Sensing, 2022, Orlando, Florida, United States
Abstract
The development of mid-IR lasers faces some unique challenges when striving to achieve the highest efficiency and power output. Most critical among these challenges is luminescence quenching of the relatively closely-spaced upper and lower laser levels, usually occurring through the process of multi-phonon relaxation. This quenching can be mitigated by using gain materials with small maximum phonon energies. In this work, mid-IR spectroscopic characterization of RE3+ doped cesium cadmium chloride (CsCdCl3) crystals was performed. The transition probabilities of RE3+ ions using Judd-Ofelt analysis as well as the multiphonon non-radiative transition rates in RE3+:CsCdCl3 were estimated. Obtained experimental results, inclusive of temperature dependent absorption and fluorescence studies, transition cross-sections, and fluorescence dynamics, were interpreted from the standpoint of optimization for diode-pumped ~3-5 um laser development.
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Ei E. Brown, Zackery Fleischman, Jason McKay, Amin Kabir, Uwe Hommerich, Sudhir Trivedi, and Mark Dubinskii "Spectroscopic investigation of rare-earth doped CsCdCl3 crystals for potential mid-IR (3-5 um) laser sources", Proc. SPIE PC12092, Laser Technology for Defense and Security XVII, PC1209203 (30 May 2022); https://doi.org/10.1117/12.2621892
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KEYWORDS
Mid-IR
Crystals
Spectroscopy
Laser crystals
Laser sources
Luminescence
Erbium lasers
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