Continuous wave frequency adjustment coherent optical fiber laser radar

A laser radar and fiber laser technology, which is applied in the re-radiation of electromagnetic waves, radio wave measurement systems, and the use of re-radiation. high effect
CN101034161AInactive Publication Date: 2007-09-12BEIHANG UNIV
3 Cites 27 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
BEIHANG UNIV
Publication Date
2007-09-12
Estimated Expiration
Not applicable Β· inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

This invention belongs to a laser radar domain, which relates to a continuous wave frequency modulation cohere laser radar which is on the basis of optical fiber laser device. Optical fiber laser device is used as light source, of which launching wnd links optical fiber coupler. Optical fiber coupler divides energy of light into two parts. Moiety is used as characteristics light, which can be directly inputted in an input end of secondary optical fiber coupler, the other part is inputted in expanding bunch lens device; after expanding bunch lens compresses laser emission angle, direct surveyed area by 2-dimensional scanner; echo-signal is feed-through one end of transmission optical fiber through optical antenna by 2-dimensional scanner, the other end of transmission optical fiber contacts secondary optical fiber coupler by optical fiber amplifier. After echo-signal and characteristics light are combined and interfered to mix frequency by optical fiber coupler, enter monitor component element. Monitor component element can transform and magnify signal photoelectricity, output, post it in computer by collecting card, carry out data processing. This invention has features of small volume, light quality, high integrated degree, good stability, intelligentification and modular.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the field of laser radar, and relates to a continuous wave frequency modulation coherent laser radar based on a fiber laser. Background technique

[0002] LiDAR and related technologies have a strong military background. The United States and other military developed countries have invested huge manpower and material resources in LiDAR and related technologies, and LiDAR technology has achieved rapid development. At present, various traditional laser radars mainly use discrete optical devices such as optical prisms, lenses, and gratings to build optical paths. With the continuous development and maturity of fiber optic light sources and various fiber optic components, it is possible to build a laser radar with an all-fiber optical path. The volume and quality of this all-fiber laser radar are much smaller than other types of laser radars currently used, do not require complex cooling systems, and can be used under various rela...

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