Figure 1
From: Time-bin entanglement at telecom wavelengths from a hybrid photonic integrated circuit
Time-bin entanglement scheme. Our setup includes the preparation of pump pulse pairs, the photonic integrated circuit (PIC), where the telecom photon pairs are created in the Bragg-reflection waveguide (BRW), filtered at a long-pass filter (LP), separated at a polarizing beam splitter (PBS) and coupled into fiber, as well as the stations of Alice and Bob, where the entanglement is analyzed. These consist of interferometers with variable phase shift (PS) and single photon detectors.
