Title:
APPARATUS FOR LOCKING FREQUENCY MODULATION BANDWIDTH OF FREQUENCY-MODULATED CONTINUOUS WAVE LASER, AND LASER RADAR DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/098296
Kind Code:
A1
Abstract:
An apparatus for locking a frequency modulation bandwidth of a frequency-modulated continuous wave laser, and a laser radar device, which belong to the technical field of laser radars. The apparatus (100) for locking a frequency modulation bandwidth of a frequency-modulated continuous wave laser comprises a laser (10), a laser driving circuit (20), a photoelectric conversion circuit (30), a signal comparison circuit (40), a pre-correction signal generation circuit (50) and a multiplication circuit (60). By using the photoelectric conversion circuit (30), the signal comparison circuit (40), the multiplication circuit (60) and the pre-correction signal generation circuit (50), an output current of the laser driving circuit (20) is controlled, such that a negative feedback adjustment of a driving current of the laser (10) can be realized; and the bandwidth of the laser (10) is locked to a preset bandwidth corresponding to a preset reference electrical signal, and a distance measurement apparatus implements distance measurement and speed measurement according to an optical signal after the negative feedback adjustment, such that the precision and accuracy of distance measurement are improved.
Inventors:
DAI XIMING (CN)
CHEN HAIMING (CN)
CHEN HAIMING (CN)
Application Number:
PCT/CN2022/124399
Publication Date:
June 08, 2023
Filing Date:
October 10, 2022
Export Citation:
Assignee:
VANJEE TECH CO LTD (CN)
International Classes:
G01S7/483
Foreign References:
| CN104078840A | 2014-10-01 | |||
| CN113394646A | 2021-09-14 | |||
| US20200011994A1 | 2020-01-09 | |||
| CN112134136A | 2020-12-25 | |||
| CN107437722A | 2017-12-05 | |||
| CN108110612A | 2018-06-01 | |||
| CN112968344A | 2021-06-15 |
Attorney, Agent or Firm:
SHENZHEN ZHONGYI UNION INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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