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High atmosphere detection laser radar based on large-photosurface superconducting single-photon detector

A single-photon detector and high-altitude atmospheric technology, which is applied in the field of lidar, can solve the problems of limiting the detection height of lidar, and achieve the advantages of detection accuracy, low jitter time, and spatial resolution.

Active Publication Date: 2017-01-25
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

Therefore, single-mode fiber-coupled detectors with small photosensitive surfaces limit the aperture of the telescope system, thereby limiting the detection height of the lidar

Method used

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  • High atmosphere detection laser radar based on large-photosurface superconducting single-photon detector
  • High atmosphere detection laser radar based on large-photosurface superconducting single-photon detector

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Embodiment Construction

[0018] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0019] An embodiment of the present invention provides a high-altitude atmospheric detection lidar based on a superconducting single-photon detector with a large photosensitive surface, such as figure 1 As shown, it mainly includes: laser pulse generation unit 10, reference laser extraction unit 20, beam expander 30, telescope 40, optical filter unit 50, beam combiner 01, optical processing unit 60, superconducting detection unit 70, data acquisition u...

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Abstract

The invention discloses high atmosphere detection laser radar based on a large-photosurface superconducting single-photon detector. By application of the large-photosurface superconducting single-photon detector to a high atmosphere detection laser radar system, high atmosphere parameter detection can be realized through increase of telescope area. Compared with an existing detector applied to the high atmosphere detection laser radar, the superconducting single-photon detector has advantages of large photosurface, high counting rate, high quantum efficiency, low dark count rate, high photon count rate and short jittering time. Therefore, the high atmosphere detection laser radar based with the large-photosurface superconducting single-photon detector is more advantageous in range resolution, spatial resolution and detection precision; in other words, under the condition of realizing same detection indexes, the laser radar with the large-photosurface superconducting single-photon detector can adopt a smaller-aperture telescope or a lower-power laser.

Description

technical field [0001] The invention relates to the field of laser radar, in particular to a high-altitude atmospheric detection laser radar based on a superconducting single-photon detector with a large photosensitive surface. Background technique [0002] Atmospheric detection lidar has been applied to speed measurement, imaging, pollutant monitoring, wind measurement, temperature measurement, and density detection due to its good directionality, high temporal and spatial resolution, high precision, and non-contact (remote sensing) detection. and other fields. At present, there are many kinds of detectors used in lidar, such as photomultiplier tube (PMT), avalanche photodiode (APD) based on semiconductor (silicon, cadmium, indium gallium arsenic), CCD and up-conversion single photon detector, etc. In contrast, the superconducting single photon detector is a new type of single photon detector, which has the advantages of high detection efficiency, low dark count, small tim...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/95G01S7/484
CPCG01S7/484G01S17/95Y02A90/10
Inventor 夏海云上官明佳窦贤康薛向辉
Owner UNIV OF SCI & TECH OF CHINA
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