302 W single-mode power from an Er/Yb fiber MOPA
Turghun Matniyaz, Fanting Kong, Monica T. Kalichevsky-Dong, Liang Dong
Abstract
There has been very little progress in the power scaling of Er/Yb fiber lasers in over a decade, reflecting the difficulties involved. Here we report, to the best of our knowledge, a new record of 302 W single-mode power from an Er/Yb fiber master oscillator power amplifier (MOPA) with a record optical efficiency of 56%, near the quantum limit. This is made possible by new fiber development from Nufern and off-resonant pumping of the Er/Yb fiber. We also show that further power scaling is no longer limited by ytterbium parasitic lasing but by fiber fuse in the Er/Yb fiber.
Topics & Concepts
Fiber laserMaterials scienceOpticsYtterbiumLasing thresholdFiberPolarization-maintaining optical fiberOptoelectronicsPower (physics)LaserOptical fiberFiber optic sensorPhysicsComposite materialQuantum mechanicsPhotonic Crystal and Fiber OpticsAdvanced Fiber Laser TechnologiesSolid State Laser Technologies