An Area Array Single Photon Camera Based on Frequency Upconversion

Abstract

The present invention proposes a surface array all-fiber single-photon camera based on frequency up-conversion, which can realize the free-running mode at room temperature by introducing an optical fiber array and a multi-channel periodically poled lithium niobate waveguide module structure, and at the same time at each pixel point Provide independent, high-efficiency, and low-noise single-photon detection, and improve the single-photon imaging detection distance, imaging resolution and imaging rate in the area array camera.

Description

technical field [0001] The invention relates to quantum imaging technology, in particular to an area array up-conversion single-photon camera. Background technique [0002] Quantum imaging in the near-infrared band is an important direction of scientific and applied research in recent years. It is an important branch of quantum precision measurement and has broad application prospects. In the field of quantum imaging, single-photon array detectors are usually used as detection units. The array detector is composed of one-dimensional or two-dimensional array single-photon detection pixels. Since the single-photon array detector has single-photon-level energy sensitivity and picosecond-level time resolution, the array detector can be used for extremely weak light target imaging and has extremely high distance resolution. [0003] At present, there are three types of near-infrared single-pixel single-photon detectors commonly used in the world: superconducting detectors, indi...

AI Technical Summary

Problems solved by technology

There are domestic and international reports of 32×32 pixel InGaAs / InP array detectors, which work in the gated mode, in which the dark current and breakdown voltage of each array element are relatively uniform, but the dark count is generally tens of thousands per second. First, a higher dark count will reduce the signal-to-noise ratio of the system, and the crosstalk between detection bins will seriously affect the time resolution. These factors will affect key indicators such as imaging distance and spatial resolution.

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