High common mode rejection ratio InP 90° optical hybrid in ultra-broadband at 60 nm with deep-rigded waveguide based on × 4 MMI coupler
(a) Cross section and (b) TE mode field distribution of deep ridge InP–InGaAsP–InP access waveguide.
High common mode rejection ratio InP 90° optical hybrid in ultra-broadband at 60 nm with deep-rigded waveguide based on × 4 MMI coupler |
(a) Cross section and (b) TE mode field distribution of deep ridge InP–InGaAsP–InP access waveguide. |
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