High-energy Q-switched 16-core tapered rod-type fiber laser system
Christopher Aleshire, Albrecht Steinkopff, Arno Klenke, César Jáuregui, Stefan Kuhn, Johannes Nold, Nicoletta Haarlammert, Thomas Schreiber, Jens Limpert
Abstract
High-energy Q-switched master oscillator power amplifier systems based on rod-type 4 × 4 multicore fibers are demonstrated, achieving energy up to 49 mJ in ns-class pulses. A tapered fiber geometry is tested that maintains low mode order in large multimode output cores, improving beam quality in comparison to a similar fiber with no taper. The tapered fiber design can be scaled both in the number of amplifying cores and in the dimensions of the cores themselves, providing a potential route toward joule-class fiber lasers systems.
Topics & Concepts
OpticsMaterials scienceFiber laserMulti-mode optical fiberPolarization-maintaining optical fiberGraded-index fiberOptical fiberDispersion-shifted fiberDouble-clad fiberFiber optic sensorLaser beam qualityPhotonic-crystal fiberPlastic optical fiberFiberMode volumeCore (optical fiber)Fiber amplifierOptoelectronicsSingle-mode optical fiberPlastic-clad silica fiberAmplifierLaserPower (physics)Beam (structure)Mode field diameterLaser power scalingAll-silica fiberFiber Bragg gratingOptical amplifierLaser beamsEnergy (signal processing)Photonic Crystal and Fiber OpticsSolid State Laser TechnologiesAdvanced Fiber Laser Technologies