High-BW TFLN Modulator Demo, but the Dual-Band Grating Coupler Steals the Show
jwt0625 · x · 2026-09-25
A look at a high-bandwidth thin-film lithium niobate (TFLN) electro-optic modulator demo. The more interesting design is a dual-band grating coupler that routes C-band and O-band in opposite directions, paired with a reflection-based mux. The author also notes the simulation appears to show higher-order modes along the thickness direction—300 nm SiN + 300 nm LN is too thick a stack.
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