High-power, fiber-pumped, picosecond green source based on BiB3O6

摘要

We report a stable, highpower,highrepetitionrate,picosecond green source at 532 nm in a compact and practical design based on singlepass secondharmonic generation (SHG) of a modelocked ytterbium fiber laser in the nonlinear material BiB3O6. Using a 10mmlong crystal, we have generated as much as 5.4 W of picosecond green radiation at 80 MHz for a fundamental average power of 14.2 W at a singlepass SHG conversion efficiency of 38%. The green output power exhibits excellent passive stability of 0.24% rms over 15 h, has a TEM00 spatial profile with M2 <1:93, and a beam pointing stability <9 μrad over 1 h without active control.