  Solid state quantum emitters with spin registers are promising platforms for
quantum communication, yet few emit in the narrow telecom band necessary for
low-loss fiber networks. Here we create and isolate near-surface single
vanadium dopants in silicon carbide (SiC) with stable and narrow emission in
the O-band (1278-1388 nm), with brightness allowing cavity-free detection in a
wafer-scale CMOS-compatible material. In vanadium ensembles, we characterize
the complex d1 orbital physics in all five available sites in 4H-SiC and
6H-SiC. The optical transitions are sensitive to mass shifts from local silicon
and carbon isotopes, enabling optically resolved nuclear spin registers.
Optically detected magnetic resonance in the ground and excited orbital states
reveals a variety of hyperfine interactions with the vanadium nuclear spin and
clock transitions for quantum memories. Finally, we demonstrate coherent
quantum control of the spin state. These results provide a path for telecom
emitters in the solid-state for quantum applications.
