Room-temperature watt-level and tunable ∼3 µm lasers in Ho<sup>3+</sup>/Pr<sup>3+</sup> co-doped AlF<sub>3</sub>-based glass fiber
Mo Liu, Jiquan Zhang, Niannian Xu, Xinwei Tian, Shijie Jia, Shunbin Wang, Gilberto Brambilla, Pengfei Wang
Abstract
A room-temperature watt-level continuous-wave-output power mid-infrared fiber laser operating at $\lambda\sim 3\; \unicode{x00B5}{\rm m}$ is demonstrated using a ${{\rm Ho}^{3 +}}/{{\rm Pr}^{3 +}}$ co-doped ${{\rm AlF} _3}$ based glass fiber as a gain fiber. This fixed-wavelength laser had maximum output power of 1.13 W with a slope efficiency of 10.3% and a long-term operating stability of ${\gt}{40}\;{\min }$ without any additional packaging or active thermal management. A fiber laser with tunability from 2.842 to 2.938 µm showed a maximum output power of 110 mW.
Topics & Concepts
Materials scienceFiber laserOpticsDopingLaserOptical fiberWattOptoelectronicsPhysicsQuantum mechanicsPower (physics)Solid State Laser TechnologiesGlass properties and applicationsPhotonic Crystal and Fiber Optics