Bias-independent Gaussian modulation quantum optical signal generation device and method
A technology of Gaussian modulation and signal generation, which is applied in photonic quantum communication, secure communication devices, and key distribution, can solve problems such as poor accuracy and stability, difficulty and influence of Gaussian modulation quantum optical signals, and improve stability and accuracy , to avoid the effect of bias drift
Active Publication Date: 2019-08-23
NO 30 INST OF CHINA ELECTRONIC TECH GRP CORP
View PDF3 Cites 6 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a bias-independent Gaussian modulation quantum optical signal generation device and method, aiming at solving the difficulty in generating Gaussian modulation quantum optical signals in the current continuous variable quantum key distribution system, which is subject to The bias drift of the intensity modulator leads to problems of poor accuracy and stability, and the invention improves the generation accuracy and stability of Gaussian modulated quantum optical signals
Method used
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
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0029] build as figure 2 A bias-independent Gaussian modulation quantum optical signal generation and detection system shown includes the following steps:
[0030] Step S1: The optical pulse signal with high extinction ratio is transmitted in two ways at a ratio of 1 / 99;
[0031] Step S2: Connect the 1 / 100 optical pulse signal to the bias-independent Gaussian modulation quantum optical signal generating device of the present invention to form the required Gaussian modulation quantum optical signal;
[0032] Step S3: Couple the 99 / 100 optical pulse light with the Gaussian modulated quantum optical signal through an optical coupler with a π phase difference after appropriate delay compensation and enter the balance detector for detection, so as to realize the extraction and recovery of the Gaussian signal and obtain the original Gaussian random number signal R*cosU.
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 PUM
Login to View More Abstract
The invention discloses a bias-independent Gaussian modulation quantum optical signal generation device and method. The device comprises a Mach-Zehnder interferometer, a digital-to-analog conversion module, a random number generation module and an optical attenuator. The input end of the Mach-Zehnder interferometer is connected with an optical pulse signal, and the output end of the Mach-Zehnder interferometer is connected with an optical attenuator. The random number generation module is connected with the digital-to-analog conversion module, and two output ports of the digital-to-analog conversion module are respectively connected to radio frequency ports of two phase modulators of the Mach-Zehnder interferometer. The Mach-Zehnder interferometer is formed by adopting two phase modulators, so that the influence of bias drift of an intensity modulator in the traditional method is avoided, and the stability and the accuracy of Gaussian modulation quantum optical signal generation are improved. By accurately controlling the optical delay of the two arms of the Mach-Zehnder interferometer, the problem of optical delay and electric delay matching between an intensity modulator and a phase modulator in a traditional method does not need to be considered.
Description
technical field [0001] The invention belongs to the technical field of quantum security communication, and in particular relates to a bias-independent Gaussian modulation quantum optical signal generation device and method. Background technique [0002] In recent years, with the development of quantum information theory and technology, the theoretical and experimental research of quantum key distribution technology has made great progress. Among them, the continuous variable quantum key distribution scheme based on coherent state has the advantages of not needing non-classical devices such as single-photon light source and single-photon detector, easy to implement in experiment, and fully compatible with classical optical communication. It has attracted great attention from domestic and foreign academic and industrial circles. [0003] In order to make the mutual information between the communication parties close to the capacity of the optical fiber channel, the coherent s...
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 Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/556H04B10/70H04L9/08
CPCH04B10/70H04L9/0852H04L9/0858H04B10/5561H04L9/0819
Inventor 王恒徐兵杰黄伟皮峣迪刘金璐邵云樊矾何远杭
Owner NO 30 INST OF CHINA ELECTRONIC TECH GRP CORP