Demonstration of diamond nuclear spin gyroscope

We demonstrate the operation of a rotation sensor based on the nitrogen-14(N-14) nuclear spins intrinsic to nitrogen-vacancy (NV) color centers in diamond. The sensor uses optical polarization and readout of the nuclei and a radio-frequency double-quantum pulse protocol that monitors N-14 nuclear spin precession. This measurement protocol suppresses the sensitivity to temperature variations in the N-14 quadrupole splitting, and it does not require microwave pulses resonant with the NV electron spin transitions. The device was tested on a rotation platform and demonstrated a sensitivity of 4.7 degrees/root s (13 mHz/root Hz), with a bias stability of 0.4 degrees/s (1.1 mHz).