GHz repetition rate, sub-100-fs Ho:CALGO laser at 2.1 µm with watt-level average power
Weichao Yao, Mohsen Khalili, Yicheng Wang, Martin Hoffmann, Marcel van Delden, Thomas Musch, Clara J. Saraceno
Abstract
We report on a GHz fundamental repetition rate Kerr-lens mode-locked Ho:CALGO laser emitting at 2.1 µm. The laser employs a ring cavity to increase the fundamental repetition rate to 1.179 GHz and can be made to oscillate in both directions stably with nearly identical performance: for the counterclockwise oscillation, it generates 93-fs pulses at 1.68 W of average power, whereas 92 fs and 1.69 W were measured for the clockwise operation. Our current results represent the highest average power from a 2-µm GHz oscillator and, to our knowledge, the first sub-100-fs pulse duration from a Ho-based oscillator.
Topics & Concepts
WattLaserOpticsRepetition (rhetorical device)Power (physics)Oscillation (cell signaling)PhysicsPulse (music)Pulse durationAtomic physicsMaterials scienceChemistryQuantum mechanicsDetectorLinguisticsBiochemistryPhilosophyAdvanced Fiber Laser TechnologiesSolid State Laser TechnologiesLaser-Matter Interactions and Applications