Fig. 1. Schematic of the experimental setup for multi-channel multiplexing quantum teleportation. OPO, optical parameter oscillator; PS, phase shifter; RFC, ring filter cavity; MC, mode cleaner; WGM, waveguide electro-optical modulator; EOAM, electro-optical amplitude modulator; EOPM, electro-optical phase modulator; PBS, polarization beam splitter; λ/2, half-wave plate; EOM, electro-optical modulator; PD, photo detector; Aux, auxiliary beam; BHD, balanced homodyne detector; LO, local oscillator; SA, spectrum analyzer; and OSC, oscilloscope.

Fig. 2. (a) Schematic of the spatial separation of the entangled sideband modes utilizing the ring filter cavities (RFCs). (b)–(f) The transmission peak for the 1st to the 5th sideband modes. The red lines represent the longitudinal modes of the OPO, and the blue lines represent the longitudinal modes of the RFC. When the upper sideband resonates with the RFC, the lower symmetrical sideband is almost completely reflected.

Fig. 3. (a) Noise power recorded by BHD C of a coherent input beam without entanglement to optimize the gain factor. (b) The fidelity at different pump powers with the 1st entangled sideband mode as the quantum resource. (c) The fidelity utilizing the broadband EOAM and the EOPM with the 1st to the 5th sideband entangled modes. (d) The fidelity utilizing the resonant EOAM and the EOPM with the 1st to the 5th sideband entangled modes. n is the order. For (b)–(d), the red lines are the bounds of the no-cloning limit, the blue points are the fidelities of the teleported state under different conditions, and the blue lines are the visual guidance [Trace (ii)].

Fig. 4. Reconstructing the Wigner functions of the input and output states. (a) The Wigner function of the input state. (b)–(f) The Wigner functions of the output states for the 1st to the 5th entangled sideband modes. p and q are momentum and position in the phase space, respectively.