System and method for generating multi-wavelength announced single-photon source based on lbo crystal

A single-photon source, multi-wavelength technology, applied in the field of quantum information, can solve problems such as large volume, difficulty in uniform modulation, and uneven performance, and achieve the effects of large number of carriers, increased transmission rate, and large field enhancement effect
CN107608159BActive Publication Date: 2021-01-26NAT QUANTUM COMM GUANGDONG CO LTD
5 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NAT QUANTUM COMM GUANGDONG CO LTD
Publication Date
2021-01-26

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a multi-wavelength announced single-photon source generation system and method based on LBO crystals. The invention uses optical frequency comb technology to excite wavelength intervals with good carrier-to-noise ratio, high flatness, and large number of carriers by a single laser light source. Uniformly distributed multi-wavelength sub-carriers, entangled photon pairs generated by LBO crystals with high nonlinear coefficients, the wavelengths are 1.3 μm and 1.55 μm, of which idler light uses 1.3 μm, signal light uses 1.55 μm, and the wavelength is in the communication band. Low loss; using commercially mature wave-division multiplexing devices, such as arrayed waveguide gratings to separate photons, has high isolation and low insertion loss; using declared light source technology, idler light (1.3μm) pulses are used as detection signal light (1.55μm ) timing gating signal, which greatly reduces the influence of dark counting, and is beneficial to increase the key generation rate and safe transmission distance of the quantum key distribution system.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present invention relates to the technical field of quantum information, and more specifically, to a system and method for generating a multi-wavelength announced single photon source based on LBO crystals. Background technique

[0002] Quantum information is a cutting-edge interdisciplinary subject produced by the combination of quantum mechanics and information science, mainly including quantum communication and quantum computing. In quantum communication technology, photons are widely used as the carrier of quantum communication because they are relatively less affected by the environment. Photons are also an important resource in quantum computing based on linear optics.

[0003] Since Bennett and Brassard proposed the first protocol (BB84) in 1984, Quantum Key Distribution (QKD) based on single photons has become the most promising technology at present, and people have done many laboratory or field demonstrations , and even some companies h...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More