Generation of 107 W, 1.07 mJ femtosecond pulses from chirped- and divided-pulse Sagnac Yb-fiber amplifiers by suppression of static mode degradation
Zhuo Shi, Jingshang Wang, Yao Zhang, Junli Wang, Zhiyi Wei, Guoqing Chang
Abstract
We investigate the effect of static mode degradation (SMD) on the power scaling of mJ-level Sagnac Yb-fiber amplifiers. We find that SMD can be effectively suppressed by inserting a polarization-filtering device between two rod-type fibers. Consequently, the resulting amplifier system exhibits improved combining efficiency and average power, and it can deliver 240 fs pulses with 1.07 mJ energy and 107 W average power. This mJ femtosecond source of hundred-watt average power is of particular importance for high-field science applications.
Topics & Concepts
FemtosecondAmplifierMaterials scienceMode field diameterOpticsFiber laserFiber amplifierPower (physics)OptoelectronicsLaserPolarization-maintaining optical fiberOptical fiberPhysicsFiber optic sensorCMOSQuantum mechanicsPhotonic Crystal and Fiber OpticsAdvanced Fiber Laser TechnologiesLaser-Matter Interactions and Applications