Intensity modulation method and intensity modulator of stable decoy state pulse

Abstract

The embodiment of the present invention discloses an intensity modulation method and an intensity modulator for a stable decoy state pulse, including: determining the number of channels of the intensity modulator under the condition that the intensity of the decoy state pulse output by the intensity modulator is a stable point , the splitting ratio of the beam splitter in each channel, the attenuation rate of the adjustable attenuator and the target input pulse intensity of the input intensity modulator; and through the maximum decoy state pulse intensity, determine the target DC load required by each first terminal Voltage pressure: when the first terminal is loaded with the target DC voltage pressure and the input pulse intensity is the target input pulse intensity, the radio frequency to be loaded on each second terminal corresponding to the decoy state pulses of different intensities is determined through the preset first formula Signal amplitude; therefore, this method not only satisfies the output of decoy pulses of various intensities, but also the intensity of the output decoy state pulses is less affected by voltage fluctuations.

Description

technical field [0001] The invention relates to the field of quantum communication, in particular to an intensity modulation method and an intensity modulator of stable decoy state pulses. Background technique [0002] Quantum secure communication based on decoy technology (English full name: decoy state method) often needs to modulate the transmitted pulse to a variety of different pulse intensities, among which inaccurate pulse intensity modulation will bring potential security to the quantum key distribution system sexual issues. [0003] At present, Mach-Zehnder modulators or Sagnac modulators are usually used to generate decoy state pulses, but these two modulators can only modulate a limited strength of decoy pulses, which cannot satisfy most quantum secrecy based on decoy state methods The communication system needs to modulate three or four pulse intensities, and the output decoy pulse is greatly affected by voltage fluctuations, resulting in differences between the...

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Problems solved by technology

[0002] Quantum secure communication based on decoy technology (English full name: decoy state method) often needs to modulate the transmitted pulse to a variety of different pulse intensities, among which inaccurate pulse intensity modulation will bring potential security to the quantum key distribution system sexual problems

[0003] At present, Mach-Zehnder modulators or Sagnac modulators are usually used to generate decoy state pulses, but these two modulators can only modulate a limited strength of decoy pulses, which cannot satisfy most quantum secrecy based on decoy state methods The communication system needs to modulate three or four pulse intensities, and the output decoy pulse is greatly affected by voltage fluctuations, resulting in differences between the actual modulated pulse intensity and the desired modulated pulse intensity

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