Method and device for realizing all-optical quantum random number generation by using four-wave mixing effect

Abstract

The invention provides a method for achieving all-optical quantum random number generation through the four-wave mixing effect. Two beams of pulse light with different wavelengths and continuous light pass through a highly nonlinear optical fiber, generate the degenerate four-wave mixing effect in the highly nonlinear optical fiber, and generate signal light with the phase having quantum randomness. The generated signal light is divided into two paths with equal intensity, one path of light interferes with the other path of light after delay, the intensity of output signals randomly occurs in the '0' state and in the '1' state, and accordingly quantization-free all-optical high-speed quantum random codes are obtained in real time. Devices used in the method include a mode-locked pulse laser device, a narrow-line-width laser device, the highly nonlinear optical fiber, a filter, a light delay line and an optical fiber coupler. The center wavelength of the mode-locked pulse laser device is not equal to that of the narrow-line-width laser device. The method for generating random numbers is conducted completely in an optical domain, can break through the electronic bottleneck limitation, does not need the light quantization technology, and is capable of generating the all-optical high-speed quantum random codes in real time.

Description

technical field [0001] The invention relates to all-optical physical random numbers, in particular to a quantization-free method and device for generating all-optical quantum random numbers by utilizing the four-wave mixing effect, which can be used for statistical sampling, Monte Carlo simulation, random models, information communication security and many others. field. Background technique [0002] Random numbers have important applications in many fields such as statistical sampling, Monte Carlo simulation, stochastic models, information and communication security. Especially with the rapid development of optical fiber communication technology, the current single-channel transmission rate has reached 40Gbps, and the single-channel transmission rate of the next-generation optical fiber communication network will reach 100Gps. Therefore, generating high-speed random numbers is a necessary condition for the development of secure communication technology. Random numbers are ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problem that the current rate of generating random numbers is not high, the present invention provides a method and device for realizing all-optical quantum random number generation by using the four-wave mixing effect

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