11:15 AM - 11:30 AM [18a-B303-9] Reduction of Vπ and coupling loss of a (Pb,La)(Zr,Ti)O3 optical modulator with up-tapered waveguide structures 〇Hideo Hara1, Shunsuke Abe1, Tomoki Joichi1, Shin Masuda1 (1.Advantest Labs.)