Phase modulation detection of a strontium atom interferometer gyroscope

We demonstrate a strontium thermal beam atom interferometer gyroscope (AIG) on a rotation table using the ${}^{1\text{\hspace{0.17em}⁣}}{S}_0$-${}^{3\text{\hspace{0.17em}⁣}}{P}_1$ intercombination line, and measure large rotation rates exceeding 6 rad/s. Our demonstration relies upon a transit-time-resonant (TTR), phase modulation technique for detecting the AIG phase which rejects signal background and variations in fringe amplitude.