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

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.

References in corpus (3)

• Versatile and widely tunable mid-infrared erbium doped ZBLAN fiber laser
• Dysprosium-doped ZBLAN fiber laser tunable from 2.8 μm to 3.4 μm, pumped at 1.7 μm
• Generation of 70-fs pulses at 2.86 μm from a mid-infrared fiber laser

Cited by in corpus (5)

• Emission beyond 4 μm and mid-infrared lasing in a dysprosium-doped indium fluoride (InF3) fiber
• Swept-wavelength mid-infrared fiber laser for real-time ammonia gas sensing
• Mode-locked dysprosium fiber laser: picosecond pulse generation from 2.97 to 3.30 μm
• Dysprosium mid-infrared lasers: current status and future prospects
• Q-switched Dy:ZBLAN fiber lasers beyond 3 μm: comparison of pulse generation using acousto-optic modulation and inkjet-printed black phosphorus