[ALPS-P2-01] Spectroscopic properties of heavily Er3+doped silica glass
*Yu Yamasaki1,2, Rieko Azuma1, Yoshio Kagebayashi1, Kana Fujioka3, Yasushi Fujimoto2(1. Ushio Inc., 2. Chiba Institute of Technology, 3. Institute of Laser Engineering, Osaka University)