Extended Data Fig. 6: Time-delay interferometer (TDI).
From: Parallelized telecom quantum networking with an ytterbium-171 atom array
An amplitude-modulating EOM directs single photons into either the free-space or the fiber-delay arm of the interferometer. The relative phase of the interferometer is locked continuously to a 1112-nm reference, and intermittently to a 1389-nm reference (see text for detail). A motor-driven fiber paddler maintains polarization stability in the fiber.
