Deep-red double-clad fiber laser at 717 nm
Esrom Kifle, Pavel Loiko, Thibaud Berthelot, Thiphaine Rault, Laurine Bodin, Florence Pau, Gilles Recoque, Thierry Georges, Patrice Camy
Abstract
We report on a double-clad fiber laser operating on the 3 P 0 → 3 F 4 Pr 3+ transition (in the deep-red spectral range) pumped by a GaN diode laser at ∼442 nm. It employs a 0.8-mol% PrF 3 -doped ZBLAN double-clad fiber with a 7.5-µm core, a double D-shaped inner cladding, and a length of 3.0 m. The laser delivers a maximum output power of 0.71 W at 716.7 nm with a slope efficiency of 9.0% (versus the launched pump power) and a laser threshold of 0.90 W. The laser emission is partially polarized. The laser performance is simulated providing a guideline for watt-level deep-red fiber laser sources.
Topics & Concepts
Materials scienceFiber laserOpticsLaserLaser power scalingZBLANOptoelectronicsLaser diodeCladding (metalworking)Slope efficiencyDiodeWavelengthPhysicsMetallurgySolid State Laser TechnologiesPhotonic Crystal and Fiber OpticsAdvanced Fiber Optic Sensors