Title:
FMCW LIDAR BASED ON CHIP INTEGRATION
Document Type and Number:
WIPO Patent Application WO/2024/001437
Kind Code:
A1
Abstract:
An FMCW lidar based on chip integration. An external-cavity tunable laser (A) is used, the laser being formed by the hybrid integration of the following: a light-emission gain chip (100); a first optical waveguide (201), a second optical waveguide (202), a broadband optical feedback structure (210), a waveguide phase tuning control area (220) and a tunable waveguide filter (230) of an integrated chip (200); a collimating optical lens (300); and an optical filtering feedback device (400). The laser has a simple, reliable and rapid laser beam wavelength tuning mechanism. An optical converter and n free space optical feedback channels are provided, such that the wavelength tuning of a laser beam in more wavelength regions and a wider wavelength range, and more choices for an emergent direction are realized. A dispersion optical element (600) is provided, such that solid-state laser beam angle scanning driven by wavelength tuning can be realized without a mechanical movement. By means of a waveguide interferometer (250) and a photoelectric balance detector (260), the wavelength tuning linearity or chirp of the external-cavity tunable laser (A) is monitored, calibrated and controlled. By means of a focusing optical lens (700), a waveguide interferometer (270) and a photoelectric balance detector (280), frequency-modulated continuous wave coherent laser ranging is realized.
Inventors:
LI RUOLIN (CN)
Application Number:
PCT/CN2023/088893
Publication Date:
January 04, 2024
Filing Date:
April 18, 2023
Export Citation:
Assignee:
ZHUHAI YINGXUN XINGUANG TECH CO LTD (CN)
International Classes:
G01S7/481; H01S3/10; H01S3/136; H01S5/14
Domestic Patent References:
| WO2021146116A1 | 2021-07-22 |
Foreign References:
| US20220094140A1 | 2022-03-24 | |||
| US20200241119A1 | 2020-07-30 | |||
| CN109991582A | 2019-07-09 | |||
| US20100277714A1 | 2010-11-04 | |||
| CN114024193A | 2022-02-08 |
Attorney, Agent or Firm:
GUANGZHOU ZHIYOU PATENT & TRADEMARK AGENCY CO., LTD. (CN)
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