Photonics engineer asks why waveguide facet angles stop short with a perpendicular portion on transmitter chips
jwt0625 · x · 2026-10-08
Continuing his photonics chip design quiz series, jwt0625 asks why output waveguides on transmitter chips are tilted at an angle (unlike on the receiver chip), and now follows up with a deeper question: why doesn't the facet angle run all the way through, with an additional perpendicular portion instead? A technical discussion relevant to silicon photonics and optical interconnect for AI infrastructure.
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