US patent US12742835
Techniques for atomic magnetometers and atomic magnetic gradiometers
Abstract
Size, weight, and cost of an atomic magnetic sensor vacuum chamber, and thus an atomic magnetometer and/or an atomic magnetic gradiometer, is reduced by using at least one photonic integrated circuit (PIC). The at least one PIC is configured to receive an optical signal, e.g., from a laser, and to distribute the optical signal to at least one set of two or more grating coupled surface emitters. Each grating coupled surface emitter is configured to collimate, direct, and emit, along a direction of emission, an optical beam, derived from a portion of the optical signal, to an optical detector.