Atmospheric detection laser radar based on superconducting single-photon detector

Abstract

The invention discloses an atmospheric detection laser radar based on a superconducting single-photon detector. Optical pulse emitted by a laser pulse generation unit points to a detected atmosphere through a transmitting telescope and a laser scanning unit, background noise of an atmospheric echo signal is filtered out by an optical preprocessing unit, an optical processing unit extracts atmospheric information, a superconducting single-photon detection unit detects the atmospheric echo signal, a data acquisition card collects the signal, and finally, a subsequent data inversion and display unit inverts and displays atmospheric parameter information. The atmospheric detection laser radar of the invention is different from the existing atmospheric detection laser radar in that the atmospheric detection laser radar of the invention uses a superconducting single-photon detector with low dark count, high quantum efficiency, wide wavelength response and low time jitter as a detection unit. By using the superconducting single-photon detector, the atmospheric detection laser radar has the advantages of high spatial resolution, high temporal resolution, large detection distance, high detection precision, and the like.

Description

technical field [0001] The invention relates to the field of laser radar, in particular to an atmospheric detection laser radar based on a superconducting single photon detector. Background technique [0002] Atmospheric detection lidar has been widely used in speed measurement, imaging, pollutant monitoring, wind measurement, temperature measurement, density measurement, etc. detection and other fields. Atmospheric detection lidar emits laser pulses into the atmosphere and detects atmospheric echo signals to retrieve atmospheric visibility, atmospheric composition, density, wind speed, temperature and other information. [0003] The main indicators of atmospheric detection lidar are: time resolution, distance resolution, detection distance, detection accuracy, etc. The performance of the detector directly affects the level of the lidar index. The indicators of the detector include detection efficiency, equivalent noise power, time jitter, detectable wavelength, etc. Amon...

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Problems solved by technology

[0005] However, so far, no patent materials and literature on the application of superconducting single photon detectors to atmospheric detection lidar have been found.

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