High coupling efficiency and low signal light loss (2 + 1) × 1 coupler
Chen Xiaoa) , Xiao Qi-Rongb) , Jin Guang-Yonga) , Yan Pingb) , Gong Ma-Lib)† 
High coupling efficiency and low signal light loss (2 + 1) × 1 coupler |
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Chen Xiao
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| Coupling efficiencies of (2 + 1) × 1 couplers with the same input mode field and the different tapered lengths. (a) Tapered length 8 cm, and coupling efficiency 89.66%; (b) tapered length 15 cm, and coupling efficiency 90.99%. |
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