Fig. 4: Example integration application of PIC to free-space beam delivery.
From: Photonic integrated beam delivery for a rubidium 3D magneto-optical trap
Illustrative example of how the large-area PIC beam emitters can be used in an integrated atomic-photonic system for cold atom trapping and probing. Heterogeneously integrated external cavity Si3N4 lasers52 can be used to generate light for atom cooling, repumping, and probing. The lasers are each stabilized to a spectroscopy reference and a probe laser is locked to a reference cavity coil resonator for frequency noise reduction. PZT-actuated51 modulators and shutters can be utilized for locking and probe light control. Each laser beam-line is delivered to the atomic species using the large-area photonic grating emitters of this work. The vacuum cell containing the atoms and the magnetic field generation layer can be planar integrated around the photonic chip.
