219.6 W large-mode-area Er:Yb codoped fiber amplifier operating at 1600 nm pumped by 1018 nm fiber lasers
Weilong Yu, Qirong Xiao, Lele Wang, Ying Zhao, Tiancheng Qi, Ping Yan, Mali Gong
Abstract
We demonstrate, to the best of our knowledge, the first high-power large-mode-area Er:Yb codoped fiber amplifier pumped by 1018 nm fiber lasers. The output power reaches 219.6 W, which is the highest power operating at 1600 nm with near-diffraction-limitation beam quality. The 1018 nm pumping scheme contributes to the mitigation of Er,Yb fiber bottlenecking, improvement in signal gain, and reduction of heat generation. Also, we inject co-propagating C-band amplified spontaneous emission (ASE) into the master amplifier to avoid unwanted backward-propagating ASE.
Topics & Concepts
Materials scienceAmplified spontaneous emissionOpticsFiber laserFiber amplifierAmplifierLaserOptoelectronicsFiberOptical fiberLaser beam qualityPhysicsLaser beamsWavelengthCMOSComposite materialPhotonic Crystal and Fiber OpticsAdvanced Fiber Laser TechnologiesOptical Network Technologies