Fig. 1: Schematic of the photon pair source including filtering and detection. | npj Quantum Information

Fig. 1: Schematic of the photon pair source including filtering and detection.

From: Telecom quantum photonic interface for a 40Ca+ single-ion quantum memory

Fig. 1

SPDC source in interferometric configuration with PDH locking beams. Stabilization of the resonator and the interferometer is achieved by piezo-driven mirrors (PM). During the stabilization runs, the photons are switched off by an optical chopper in order to protect the APDs. HWP/QWP half-/quarter-wave plate, PBS polarizing beamsplitter, BS non-polarizing beamsplitter, DM dichroic mirror, Pol polarizer, WP Wollaston prism, GP glass plate, PM piezo-driven mirror, FPI frequency filter.

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