1. Purpose and scope
Photonic design kits are younger than the kits for mature electronic processes. Components may have been measured on few runs, models may be fitted to limited data, and some components a product needs may not exist in the library at all. This stage makes sure every building block the circuit will use is available, modelled and labelled with how far it can be trusted, so that circuit design does not rest on assumptions nobody has checked.
The stage covers waveguides, bends, crossings, splitters, couplers to fibre, modulators, photodetectors, heaters and filters from the foundry kit, and any custom components the team designs itself. It ends when the kit and library versions are locked for the tape-out and the compact models the circuit simulation will use are released.
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