High-average-power thin-tapered-rod ultrafast laser amplifier with gradient-doped Yb:YAG crystal
Ivan Kuznetsov, S. A. Chizhov, Oleg Palashov
Abstract
Gradient doping in thin-rod and thin-tapered-rod active elements was proposed and implemented. Thermal and laser processes in such elements were studied theoretically and experimentally. It was shown that the use of tapered active elements with gradient doping enables simultaneous gain enhancement and reduction of the temperature of the active medium, thereby increasing amplification efficiency and improving beam quality. An amplifier with unique cumulative parameters: an average power of 150 W and an amplification efficiency of 35% with beam quality parameter M 2 =1.62×1.53 was developed.
Topics & Concepts
Materials scienceDopingLaser beam qualityTemperature gradientLaserAmplifierOpticsSlope efficiencyCrystal (programming language)Beam (structure)OptoelectronicsUltrashort pulseThermalThin filmPower (physics)Laser beamsFiber laserPhysicsNanotechnologyWavelengthProgramming languageQuantum mechanicsCMOSComputer scienceMeteorologySolid State Laser TechnologiesLaser Design and ApplicationsLaser-Matter Interactions and Applications