3C Ybdoped Fiber Based High Energy and （3 c Ybdoped纤维高能源和基础）.pdf

3C Yb-doped Fiber Based High Energy and Power Pulsed Fiber Lasers a a a b b b Thomas Sosnowski* , Andrey Kuznetsov , Robert Maynard , Xiuquan Ma , Cheng Zhu , I-Ning Hu , Almantas b c c Galvanauskas , Joona J. Koponen , Timothy S. McComb a nLight Corporation, 251 Jackson Plaza, Unit A1, Ann Arbor, MI 48103; bCenter for Ultrafast Optical Science, University of Michigan 2200 Bonisteel Blvd., Ann Arbor, MI 48109 ; c nLight Corporation, 5408 NE 88th Street, Building E,Vancouver, WA 98665 ABSTRACT 3C fiber technology advances the performance frontier of practical, high-pulse-energy fiber lasers by providing very large core fibers with the handling and packaging benefits associated with single mode fibers. First-generation fibers demonstrate scaling to 240 W average power coincident with 100-kW peak power in 1-mJ, 10-ns pulses while maintaining single-mode beam quality, polarized output, and efficiencies 70%. Peak powers over 0.5 MW with negligible spectral distortion can be achieved with sub ns, near-transform-limited pulses. In-development second- generation 3C Yb-fiber based on core sizes around 55 μm1 have produced 8 mJ, 13 ns pulses with peak powers exceeding 600 kW. Keywords: Fiber Laser, Peak Power, 3C, CCC, Power Scaling, Pulsed Laser 1. INTRODUCTION A principal advantage of fiber laser technology is its