A Frequency-Domain Multiplexing Announced Single-Photon Source in the Optical Communication Band
A single photon source and optical communication technology, applied in photon quantum communication, optics, light guide, etc., can solve the problems of unsuitable fiber-based long-distance quantum detection and quantum network applications, and achieve the effect of easy assembly
Active Publication Date: 2022-03-08
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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However, the operating wavelengths of the currently implemented frequency-domain multiplexed announced single-photon sources are not within the range of optical communication bands, so they are not suitable for the application of fiber-based long-distance quantum detection and quantum networks.
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[0032] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.
[0033] Such as figure 1 As shown, the embodiment of the present invention provides a frequency-domain multiplexing declared single photon source in the optical communication band, including a frequency-domain broadband quantum correlated photon-pairsource (broadband quantum correlated photon-pairsource) 1 in the optical communication band, dense wave decomposition multiplexing 2, n single photon detectors 31, 32...3n, n is a positive integer, an electrical signal processing and generating circuit 4, a frequency shift electrical signal generator 5, an optical delay module 6 and a phase modulator 7 ;
[0034] The frequency-domain broadband signal photon ω generated by the frequency-domain broadband quantum correlatio...
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Abstract
The invention relates to a frequency-domain multiplex announcement type single photon source in the optical communication band. By using the frequency-domain broadband quantum correlation light source in the optical communication band to output correlated photon pairs at a high rate; through the dense wave decomposition multiplexer and single photon detector to select and detect the idle frequency photons of multiple frequency channels, thereby generating electrical pulses Signal, announced electrical signal processing and generating circuit output announced electrical signal according to the input electrical pulse signal; announced electrical signal triggers frequency-shifted electrical signal generator to generate frequency-shifted electrical signal; based on the correlation characteristics of quantum-related photon pairs in the time domain, the phase The modulator shifts the frequency of the signal photons corresponding to the idler photons according to the frequency-shifted electrical signal, so that the frequency-domain multiplexed announced single-photon source can output high-identity single-photon sources at a high rate under the condition of ensuring extremely high single-photon purity. photon. All devices used in the present invention can come from mature optoelectronic devices, which is beneficial to system assembly preparation and practical development.
Description
technical field [0001] The invention belongs to the field of quantum detection and quantum network, and in particular relates to a frequency-domain multiplex announcement type single photon source in the optical communication band. Background technique [0002] In recent years, optical quantum information technology is gradually moving from experimental research to practical engineering applications, including the realization of single-photon imaging and fiber-based quantum teleportation. However, high-quality single-photon sources are still the key to restricting its practical development. In long-distance quantum detection and quantum network applications, especially in quantum teleportation, it is required to use a single photon source with three important characteristics: emit photon wave packets on demand; there is one photon in the emitted photon wave packets, and As far as possible there is only one photon; the emitted photon wave packets are highly indistinguishable....
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IPC IPC(8): H04B10/70H04B10/548G02B6/293G02F1/355
CPCH04B10/70H04B10/548G02B6/29316G02B6/29317G02F1/3551
Inventor 周强余豪袁晨智宋海智邓光伟王浟
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA