Wavelength division multiplexing continuous variable quantum key distribution system and method based on optical soliton

The invention provides a wavelength division multiplexing continuous variable quantum key distribution system based on an optical soliton, and the system comprises a transmitting end which uses an optical soliton source as a light source, and separates the optical soliton source to each wavelength channel; performing continuous variable quantum key distribution on each wavelength channel by using a pilot-assisted feedforward data recovery scheme; the optical fiber channel is used for transmitting the optical signal transmitted by the transmitting end; the receiving end is used for receiving the optical signal transmitted through the optical fiber channel and separating the optical signal to each wavelength channel; and the receiving end uses a local optical soliton source as a light source and separates the local optical soliton source to each wavelength channel for signal heterodyne detection and post-processing to obtain a quantum key. The optical soliton source adopted by the invention has basic technical