TY - JOUR AB - We report the generation of 28 W of 780 nm radiation with near diffraction limited beam quality (M²≤1.15) by frequency-doubling a continuous-wave (CW) erbium fiber master oscillator power amplifier (MOPA) system in a periodically poled lithium niobate crystal. The second-harmonic generation conversion efficiency reached 45% with no roll-off observed, suggesting that further power scaling should be possible with higher fundamental pump powers. The generated second-harmonic had a 3 dB spectral bandwidth of 0.10 nm. The presented architecture represents a simple and effective route to generating high-brightness radiation around 780 nm. AU - Runcorn,TH AU - Murray,RT AU - Taylor,JR DO - 10.1109/LPT.2017.2737227 EP - 1579 PY - 2017/// SN - 1041-1135 SP - 1576 TI - High Average Power Second-harmonic Generation of a CW Erbium Fiber MOPA T2 - IEEE Photonics Technology Letters UR - http://dx.doi.org/10.1109/LPT.2017.2737227 UR - http://hdl.handle.net/10044/1/50311 VL - 29 ER -