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Hybrid femtosecond laser system based on a Yb:KGW regenerative amplifier for NP polarization
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2019
Year
Optical MaterialsEngineeringLaser ScienceNp PolarizationLaser ApplicationsLaser PhysicsSuper-intense LasersFiber LasersHigh-power LasersOptical AmplifierShort-pulse LasersOptical AmplificationOptical PropertiesLaser AmplifiersFiber LaserOptical PumpingPhotonicsElectrical EngineeringNonlinear AmplificationUltrafast Laser PhysicsGain Narrowing EffectApplied PhysicsFibre Amplifier
We report a hybrid femtosecond laser system based on a femtosecond Yb-doped fiber laser and a Yb-doped potassium gadolinium tungstate (Yb:KGW) regenerative amplifier. To match the central wavelength of the seed source, a Yb:KGW crystal is used in the regenerative amplifier for Np polarization. We study and optimize the dynamics of nonlinear amplification to alleviate the gain narrowing effect. With optimization, the system can output 270 fs pulses with 21 μJ pulse energy at a 60 kHz repetition rate.