09:30 〜 11:30 ▲ [18a-PA5-4] Carrier-injection Ge MIR Variable Optical Attenuator Formed by Spin-on-Glass Doping 〇(DC)Ziqiang Zhao1、Chongpei Ho1、Shinichi Takagi1、Mitsuru Takenaka1 (1.The Univ. of Tokyo)