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Optical fibre single photon routing operating controller

A control device and single-photon technology, which is applied to the selection device, selection device, and electrical components of the multiplexing system, can solve problems such as inability to maintain stability, and achieve the effect of easy integration

Inactive Publication Date: 2005-04-27
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the fiber is greatly affected by the environment, the single-photon interference in the fiber cannot be kept stable when the fiber length reaches several meters.

Method used

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  • Optical fibre single photon routing operating controller
  • Optical fibre single photon routing operating controller
  • Optical fibre single photon routing operating controller

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] An optical fiber single-photon routing control device with the above-mentioned structure is characterized in that the average number of photons per pulse of the incident single-photon pulse 10 is ≤0.5, the wavelength is 1550nm, the phase modulator 6 is Aeroflex 10G type, and the delay signal generator 8 It is a DG535 type, and the length of the optical fiber 4 is 5km.

Embodiment 2

[0028] An optical fiber single-photon routing control device with the above structure or the structure described in Embodiment 1 is characterized in that the length of the optical fiber 4 is 28 km.

[0029] The single-photon source that generates single-photons and the instrument that detects single-photons: Agilent 33250A pulse signal generator, which modulates New Focus-Vortex 6000 series semiconductor lasers (LD) to generate light pulses with a wavelength of 1550nm, and the generated light pulses are attenuated Attenuate the chip to the single photon level, and at the same time output the synchronous pulse signal to the SR400 photon counter and the DG535 delay signal generator, and the single photon detector InGaAs avalanche diode detects the Single photon, the detected signal is sent to the SR400 photon counter, and the latter completes the single photon counting.

[0030] The pulse signal generator modulates the semiconductor laser with a repetition frequency of 10KHz, an...

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Abstract

An optical-fibre single-photon routing controller is composed of the light path consisting of single photon incident port, circulator, optical fibre coupler, optical fibre, polarization controllers and phase modulator, and the circuit consisting of phase modulator and delay signal generator. Its successfull rate is over 92%.

Description

technical field [0001] The invention relates to an optical fiber single-photon routing control device, which realizes the single-photon routing control in the optical fiber, and belongs to the technical field of quantum security communication. Background technique [0002] Quantum secure communication is communication based on light quantum. Information is loaded on and transmitted by a single photon. The unknown quantum state cannot be cloned. Measuring the quantum will change the quantum state, so that it is impossible for an eavesdropper to obtain the communication information without being caught. It is found that, therefore, quantum secure communication can realize the absolute secrecy of communication. This will be widely used in military confidential transmission and commercial information authentication. Similar to existing optical communication, quantum secure communication also has the problem of routing and manipulating quantum information,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/08H04Q1/18H04Q3/52H04Q11/00
Inventor 周春源吴光曾和平
Owner EAST CHINA NORMAL UNIV