Time division multiplexing based single-detector all-fiber polarization lidar

A single-detector, time-division multiplexing technology, used in instruments, measuring devices, and re-radiation, etc., can solve the problems of inability to work during the day, unsafe for human eyes, high output power, etc. The effect of low output power

Inactive Publication Date: 2017-02-22
UNIV OF SCI & TECH OF CHINA
View PDF4 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] To sum up, most of the above polarized lidar systems use visible light band or 1064nm laser source, the output power is high, the human eye is not safe, and the system is huge; the space optical path system is used, and the structure is unstable; it is greatly affected by the sun and sky background radiation, and cannot be used during the daytime. work, low signal-to-noise ratio
In addition, these systems all use dual detectors to detect two echo signals with different polarization states, which is expensive, and the depolarization ratio is affected by the fluctuation of the detector efficiency, and the signal-to-noise ratio is low

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Time division multiplexing based single-detector all-fiber polarization lidar
  • Time division multiplexing based single-detector all-fiber polarization lidar
  • Time division multiplexing based single-detector all-fiber polarization lidar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The technical solutions in the embodiments of the present invention will be 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.

[0025] figure 1 A schematic structural diagram of a single-detector all-fiber polarization laser radar based on time-division multiplexing provided by an embodiment of the present invention; figure 1 As shown, it mainly includes:

[0026] A single-detector all-fiber polarization laser radar based on time-division multiplexing, characterized in that it includes: a continuous laser 1, an optical fiber isolator 2, an intensity modulator 3, an arbitra...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a time division multiplexing based single-detector all-fiber polarization lidar. The lidar adopts all-fiber link, utilizes a delay fiber to realize time division multiplexing, and uses a single detector to realize simultaneous detection of parallel polarization signals and vertical polarization signals in radar echoes. Detection of atmospheric depolarization ratio is realized with the single detector, and the liar has the advantages of low cost, system stability, relative eye safety, all-fiber link, compact structure and the like.

Description

technical field [0001] The invention relates to the technical field of laser radar, in particular to a single-detector all-fiber polarization laser radar based on time division multiplexing. Background technique [0002] Air pollution has become one of the major problems my country faces in the 21st century. Among them, aerosol pollution is the main component of air pollution in the atmospheric boundary layer. Acidic spherical particles produced by automobile exhaust and industrial emissions and non-spherical particles mainly caused by ground dust have become the main source of aerosols at the bottom of the city, causing great harm to human health and the living environment. The inhalable Particulate matter PM2.5 is a direct threat to human life. [0003] At present, the ground-based aerosol remote sensing methods carried out in China mainly include broadband spectral radiation remote sensing of direct solar radiation, multi-band photometer remote sensing, remote sensing b...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/95
CPCG01S17/95Y02A90/10
Inventor 夏海云裘家伟上官明佳王冲窦贤康
Owner UNIV OF SCI & TECH OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap