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-Ming^{1, †}

(a) Comparison of length between the traditional DSLS MMI and DSPS MMI; (b) relation between α and W_n/W_l of DSPS MMI; (c) relation between α and C of DSPS MMI.