Wide frequency tuning path entanglement and frequency entanglement chip based on Mach-Zehnder interferometer

Abstract

The invention relates to a wide frequency tuning path entanglement and frequency entanglement chip based on a Mach-Zehnder interferometer. The disclosed wide frequency tuning path entanglement and frequency entanglement generation chip based on multi-period polarization and electro-optical regulation and control comprises a waveguide optical path, a waveguide electro-optical phase modulator, a multi-period polarization region and an MZ interferometer which are connected in sequence, wherein the multi-period polarization region is composed of a plurality of ferroelectric domains of different periods, and wide-tuning second-order nonlinear photon frequency conversion is achieved; the waveguide optical path is composed of a single-mode waveguide, an inverted-cone waveguide and a waveguide beam splitter, and linear processing is carried out on light or photons generated from a periodic polarization region; the waveguide electro-optic phase modulator has an electrode manufactured on a waveguide, and an electric field is applied to the electrode to change the refractive index in the waveguide so as to modulate the phase of photons; and the MZ interferometer is composed of a single-mode waveguide, a waveguide beam splitter and a waveguide electro-optic phase modulator, and a beam splitting ratio of the MZ interferometer is accurately controlled under different frequencies through the electro-optic phase modulator. Therefore, the chip type electric control wide-frequency tuning quantum light source is formed.

Description

technical field [0001] The invention relates to the fields of quantum information technology, optoelectronic technology and nonlinear optics, in particular, a chip-based quantum light source is realized by using integrated optical technology and ideas. Specifically, it is based on multi-period polarization and electro-optic control of Mach-Zehnder (Mach-Zehnder) interferometer wide-frequency tuning path entanglement and frequency entanglement generation chip. Background technique [0002] Quantum light sources, including single photon sources, identical photon sources, and entangled light sources, are core resources in quantum information technologies such as quantum communication and quantum computing. Therefore, how to prepare quantum light sources, especially adjustable, efficient, stable, and portable quantum light sources has always been a research difficulty and hot spot in the field of quantum information. Historically, quantum photon pairs have been generated by: (1...

AI Technical Summary

Problems solved by technology

[0026] The purpose of the present invention is to solve the problems mentioned above, to propose a quantum light source chip and setting method based on multi-period polarization and MZ interferometer, based on multi-period polarization and electro-optic control Mach-Zehnder (Mach–Zehnder) interference Wide-frequency tuning path entanglement and frequency entanglement generating chip and setting method of instrument

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