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, †}

Curves of bar and cross port output power versus L_m for (a) DSPS MMI device and (b) traditional DSLS MMI device.