Yb^3+-doped silica glass rod with high optical quality and low optical attenuation prepared by modified sol-gel technology for large mode area fiber

• DOI: 10.1364/ome.7.002012
• Publication Date: 2017-05-19T19:32:06Z
• Authors: Shikai Wang; Wenbin Xu; Fan Wang; Fengguang Lou; Lei Zhang; Qinling Zhou; Danping Chen; Suya Feng; Meng Wang; Chunlei Yu; Lili Hu
• Keywords: Slope efficiency; Ytterbium; Rod; Numerical aperture

We report on a modified sol-gel method combined with an innovative high-temperature melting technology for the preparation of Yb3+-doped silica glass rods (∅3−18 mm) high optical quality and low background loss. prepared Al-Yb, Al-P-Yb, Al-F-Yb, Al-P-F-Yb doped large mode area fibers (LMA) laser power core numerical aperture (0.02). were able to successfully solve doping homogeneity problem caused by volatility P F. More importantly, we developed purification reduced attenuation 0.05 dB/m. An Al-Yb co-doped photonic crystal fiber (PCF) diameter 100 µm was fabricated behaviour characterization. In continuous wavelength measurement, output slope efficiency 83.3% obtained from PCF. To our knowledge, this is highest derived PCF non-CVD method. pulse amplification experiment, average amplified 310 W peak 1.5 MW duration 21 ps achieved.