8 W 240 fs diode-pumped Yb:Y2O3 ceramic thin-rod femtosecond amplifier Kim, Jun Wan ; Sall, Elena ; Lee, Byunghak ; Jeong, Bosu ; Park, Seolwon ; Kim, Chur ; Heo, Duchang ; Yashin, V. E. ; Yang, Juhee ; Kim, Guang-Hoon Abstract Publication: Optics Express Pub Date: October 2019 DOI: 10.1364/OE.27.031418 Bibcode: 2019OExpr..2731418K