  We present chip-scale transmission measurements for three key components of a
GaP-on-diamond integrated photonics platform: waveguide-coupled disk
resonators, directional couplers, and grating couplers. We also present
proof-of-principle measurements demonstrating nitrogen-vacancy (NV) center
emission coupled into selected devices. The demonstrated device performance,
uniformity and yield place the platform in a strong position to realize
measurement-based quantum information protocols utilizing the NV center in
diamond.
