麻豆传媒

Figure 1. Experimental setup. a, Experimental setup of chip-based three-node quantum network. It mainly consists of two quantum links: Bob-Alice and Charlie-Alice, connected by spooled fibers. The signal lights from Bob and Charlie are multiplexed by a dense wavelength division multiplexer (DWDM) before being measured by Alice. Bob and Charlie each have a laser diode (LD), a silicon-based encoder chip, and an off-chip variable optical attenuator (VOA). Alice has a DWDM, a silicon-based decoder chip with polarization tracking capability, and four single-photon detectors (SNSPDs). b, Microscopic view of the encoder chip. c, Microscopic view of the decoder chip. The encoder and decoder chip are coupled to fiber array (FA).