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1. WO2020139516 - FMCW LIDAR WITH WAVELENGTH DIVERSITY

Publication Number WO/2020/139516
Publication Date 02.07.2020
International Application No. PCT/US2019/063892
International Filing Date 30.11.2019
IPC
G01S 7/481 2006.01
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
7Details of systems according to groups G01S13/, G01S15/, G01S17/127
48of systems according to group G01S17/58
481Constructional features, e.g. arrangements of optical elements
G01S 17/26 2020.01
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
17Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
02Systems using the reflection of electromagnetic waves other than radio waves
06Systems determining position data of a target
08for measuring distance only
10using transmission of interrupted, pulse-modulated waves
26wherein the transmitted pulses use a frequency-modulated or phase-modulated carrier wave, e.g. for pulse compression of received signals
G01S 17/58 2006.01
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
17Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
02Systems using the reflection of electromagnetic waves other than radio waves
50Systems of measurement based on relative movement of target
58Velocity or trajectory determination systems; Sense-of-movement determination systems
H01S 5/062 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
5Semiconductor lasers
06Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
062by varying the potential of the electrodes
CPC
G01S 17/26
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
17Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
02Systems using the reflection of electromagnetic waves other than radio waves
06Systems determining position data of a target
08for measuring distance only
10using transmission of interrupted, pulse-modulated waves
26wherein the transmitted pulses use a frequency-modulated or phase-modulated carrier wave, e.g. for pulse compression of received signals
G01S 17/34
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
17Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
02Systems using the reflection of electromagnetic waves other than radio waves
06Systems determining position data of a target
08for measuring distance only
32using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
34using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
G01S 17/58
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
17Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
02Systems using the reflection of electromagnetic waves other than radio waves
50Systems of measurement based on relative movement of target
58Velocity or trajectory determination systems; Sense-of-movement determination systems
G01S 7/4815
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
7Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
48of systems according to group G01S17/00
481Constructional features, e.g. arrangements of optical elements
4814of transmitters alone
4815using multiple transmitters
G01S 7/4911
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
7Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
48of systems according to group G01S17/00
491Details of non-pulse systems
4911Transmitters
G02F 2203/54
GPHYSICS
02OPTICS
FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
2203Function characteristic
54Optical pulse train (comb) synthesizer
Applicants
  • GM CRUISE HOLDINGS LLC [US]/[US]
Inventors
  • MALEKI, Lutfollah
Agents
  • BEHRENS, Todd E.
Priority Data
16/236,48429.12.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) FMCW LIDAR WITH WAVELENGTH DIVERSITY
(FR) LIDAR FMCW À DIVERSITÉ DE LONGUEUR D'ONDE
Abstract
(EN)
Various technologies described herein pertain to multiple laser, single optical resonator lidar systems. A lidar system includes a single optical resonator optically coupled to at least a first laser and a second laser. The optical resonator is formed of an electrooptic material. The first laser and the second laser are optically injection locked to the optical resonator. A modulator applies a time-varying voltage to the optical resonator to control modulation of an optical property of the electrooptic material, which causes the first laser to generate a first frequency modulated optical signal comprising a first series of optical chirps and/or the second laser to generate a second frequency modulated optical signal comprising a second series of optical chirps. Further, front end optics transmits at least a portion of the first frequency modulated optical signal and/or the second frequency modulated optical signal into an environment from the lidar system.
(FR)
Diverses technologies de la présente invention concernent des systèmes lidar à lasers multiples et à résonateur optique unique. Un système lidar comprend un résonateur optique unique couplé optiquement à au moins un premier laser et un second laser. Le résonateur optique est formé d'un matériau électro-optique. Le premier laser et le second laser sont optiquement verrouillés par injection au résonateur optique. Un modulateur applique une tension variable dans le temps au résonateur optique afin de commander la modulation d'une propriété optique du matériau électro-optique, qui amène le premier laser à générer un premier signal optique modulé en fréquence comprenant une première série de fluctuations optiques et/ou le second laser à générer un second signal optique modulé en fréquence comprenant une seconde série de fluctuations optiques. En outre, une optique frontale émet au moins une partie du premier signal optique modulé en fréquence et/ou du second signal optique modulé en fréquence dans un environnement depuis le système lidar.
Also published as
Latest bibliographic data on file with the International Bureau