Dual-beam Atom Interferometer Characterization

We present new measurements of a continuous, dual-beam atom interferometer designed for inertial sensing. Each atom beam is derived from an atom source which emits a continuous beam of sub-Doppler cooled atoms while simultaneously mitigating near-resonant scattered light. We will discuss the process of design iteration of the atomic sources, laser system, and optics delivery aimed towards resilience of long-term drifts in the system. We will also describe an in-depth analysis of the error sources discovered and characterized to date, as well as unique noise characteristics of this system. We will tailor our discussions with an eye towards the future, ultimately informing and enabling designs with high dynamic range, sensitivity, and accuracy. Our work here inspires future cold-beam architectures including a more compact and robust sensor for maritime use.