Ultra-wide frequency tuning quantum light source chip based on type-II parameter down-conversion

A parametric down-conversion and frequency tuning technology, applied in the field of quantum information technology and nonlinear optics, can solve the problems of low wavelength tuning ability, single use, and inability to continuously cover visible light and communication bands.
CN113156736AActive Publication Date: 2021-07-23NANJING UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING UNIV
Publication Date
2021-07-23

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Abstract

Disclosed is an ultra-wide frequency tuning quantum light source chip based on type-II parameter down-conversion. A plurality of waveguides which are in a serial or / and parallel combined mode and have polarized domain inversion areas are arranged on a ferroelectric material comprising lithium niobate, and the generated nonlinear process is subjected to type-II parameter conversion through the polarization period design of the domain inversion. In other words, the incident light conversion process under the parametric condition is a polarization combination mode of two kinds of orthogonal polarized light generated by linear polarization pumping. The chip type ultra-wide frequency tuning quantum light source provided by the invention has ultra-wide wavelength tuning capability, can meet various wavelength requirements, and realizes photon frequency conversion and frequency width tuning. The ultra-wide frequency tuning quantum light source chip can be used as a tunable correlated photon source of various wave bands and a wide tuning predictable single photon source, and can be used as a core basic light source of a light quantum information technology.
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Description

technical field

[0001] The present invention relates to the field of quantum information technology and nonlinear optics, in particular, it utilizes integrated optics technology and ideas to realize chip-based wide-tunable quantum light source. Background technique

[0002] In recent years, quantum information technology has developed rapidly, and quantum communication and quantum computing have also been carried out under various conditions. The launch of the quantum science experiment satellite Micius opened the prelude to ultra-long-distance satellite-earth quantum communication, but many different experimental conditions Under the current situation, various requirements are put forward for the entangled photon source and single photon source which are the core resources in quantum information technology. For example, the 800nm ​​band and the 1550nm band are common bands for space quantum communication, but 800nm ​​is easily interfered during the daytime, and it is necess...

Claims

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