CVQKD system and method based on silicon photonic integrated chip

Abstract

The invention discloses a CVQKD system based on a silicon photonic integrated chip. The CVQKD system comprises a light source processing part, a quantum key transmitting end, an optical fiber channel and a receiving end; wherein the light source processing part carries out coupling processing on signals emitted by a light source and distributes the signals. The quantum key transmitting end modulates, filters, demodulates and samples the signal light to generate a Gaussian key, and the Gaussian key is coupled and then transmitted to the quantum key receiving end through an optical fiber channel; the quantum key receiving end processes the optical signal output by the optical fiber channel and performs homodyne detection; and the quantum key transmitting end and the quantum key output end are integrated on the same silicon-based photon chip by using a silicon photon integration technology. The invention further discloses a method of the CVQKD system based on the silicon photonic integrated chip. The integrated density of a chip device is remarkably improved, the size of the device is reduced, a large amount of manufacturing cost is saved, and a quantum network is simpler.

Description

technical field [0001] The invention specifically relates to a CVQKD system and method based on a silicon photonic integrated chip. Background technique [0002] Today, the traditional semiconductor industry has been limited by physical limits, and the method of increasing chip integration by reducing the feature size is about to fail. Silicon photonics technology has become one of the potential technologies to prolong the life of Moore's Law because of its special advantages in energy consumption, bandwidth, operating speed, heat dissipation, and volume size. Silicon photonics integrated chip is a new type of integrated chip that uses silicon photonics technology to integrate optoelectronic devices with various functions on the same silicon substrate on the basis of compatibility with CMOS technology. [0003] Quantum key distribution (QKD) is an important part of quantum information science, which is the process of transmitting coded states and obtaining security keys thr...

AI Technical Summary

Problems solved by technology

[0004] In the past two years, some scholars have built QKD systems on silicon-based photonic platforms, but most of the silicon photonic integrated chips studied are aimed at integrated DVQKD systems, with low chip integration and low security key generation ra

Images