Compact 2×2 parabolic multimode interference thermo–optic switches based on fluorinated photopolymer
Wang Ji-Hou1, Chen Chang-Ming1, Hu Ke-Wei1, Cheng Ru1, Wang Chun-Xue1, Yi Yun-Ji1, Sun Xiao-Qiang1, Wang Fei1, Li Zhi-Yong2, Zhang Da-Ming1, †
       

(a) Overall structure of DSPS MMI TO waveguide switch, and (b) cross-sectional waveguide structure with electrode.