2 kW random fiber laser based on hybrid Yb-Raman gain [Invited]
Jun Ye, Yang Zhang, Junrui Liang, Xiaoya Ma, Jiangming Xu, Tianfu Yao, Jinyong Leng, Pu Zhou
Abstract
High-power operation is one of the most important research topics surrounding random fiber lasers (RDFLs). Here we optimized the cavity structure and proposed a new scheme based on hybrid gain to address the issue of high-power backward light in traditional kilowatt-level RDFLs. Consequently, a record power of 1972 W was achieved while the maximum backward leaked power only reached 0.12 W. The conversion efficiency relative to the laser diode pump power was 68.4%, and the highest spectral purity of the random lasing reached 98.1%. This work may provide a reference for high-power RDFLs, Raman fiber lasers, and long-wavelength Yb-doped fiber lasers.
Topics & Concepts
Fiber laserMaterials scienceOpticsLaserLasing thresholdPower (physics)Raman laserLaser power scalingOptoelectronicsRaman spectroscopyFiberWavelengthRaman scatteringPhysicsQuantum mechanicsComposite materialRandom lasers and scattering mediaOrbital Angular Momentum in OpticsPhotonic Crystal and Fiber Optics