Synchronously pumped NMR gyro

We are implementing a new design for spinexchange- pumped NMR gyros that addresses the key systematic errors as compared to previous implementations. The key concept is to drive magnetic resonance using spin-exchange collisions in a reference frame rotating about a bias magnetic field. The resulting purely transverse polarization is predicted to be insensitive to spin-exchange field shifts and quadrupole interactions, both of which are prominent in designs based on conventional magnetic resonance. Preliminary studies have identified a novel type of spin-exchange broadening that can be compensated to allow the system to reach T1-limited line width.