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arXiv · 1803.09209

Watt-level dysprosium fiber laser at 3.15 μm with 73% slope efficiency

R. I. Woodward·M. R. Majewski·G. Bharathan·D. D. Hudson·A. Fuerbach·S. D. Jackson
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Abstract

Rare-earth-doped fiber lasers are emerging as promising high-power mid-infrared sources for the 2.6-3.0 μm and 3.3-3.8 μm regions based on erbium and holmium ions. The intermediate wavelength range, however, remains vastly underserved, despite prospects for important manufacturing and defense applications. Here, we demonstrate the potential of dysprosium-doped fiber to solve this problem, with a simple in-band pumped grating-stabilized linear cavity generating up to 1.06 W at 3.15 μm. A slope efficiency of 73% with respect to launched power (77% relative to absorbed power) is achieved: the highest value for any mid-infrared fiber laser to date, to the best of our knowledge. Opportunities for further power and efficiency scaling are also discussed.

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R. I. Woodward, M. R. Majewski, G. Bharathan, D. D. Hudson, A. Fuerbach, S. D. Jackson. 2018-03-25. Watt-level dysprosium fiber laser at 3.15 μm with 73% slope efficiency. https://doi.org/10.1364/ol.43.001471

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