  Silicon has attracted attention as an inexpensive and scalable material
system for photonic-electronic, system-on-chip development. For this, a
platform with both photodetectors and modulators working at high speeds, with
excellent cross-wafer uniformity, is needed. We demonstrate an
optical-lithography, wafer-scale photonics platform with 25 Gb/s operation. We
also demonstrate modulation with an ultra-low drive voltage of 1 Vpp at 25
Gb/s. We demonstrate attractive cross-wafer uniformity, and provide detailed
information about the device geometry. Our platform is available to the
community as part of a photonics shuttle service.
