CUMEC's 8-inch Heterogeneous TFLN-on-SiPho: 100GHz Modulators, 1.6dB Edge Coupling Loss
jwt0625 · x · 2026-09-26
A detailed look at CUMEC's heterogeneous integrated TFLN on an 8-inch silicon photonics platform: EO modulators with 100GHz 3dB bandwidth and PDs around 50GHz. The LN waveguide is thick, forcing long modulators. Vertical couplers show just 0.1dB insertion loss, while edge couplers are a poor 1.6dB. The author notes CUMEC appears often enough that their monthly wafer output is worth investigating.
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