ES2822587T3 - Sistema y método de detección de heterodinos - Google Patents

Sistema y método de detección de heterodinos Download PDF

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Publication number
ES2822587T3
ES2822587T3 ES13726245T ES13726245T ES2822587T3 ES 2822587 T3 ES2822587 T3 ES 2822587T3 ES 13726245 T ES13726245 T ES 13726245T ES 13726245 T ES13726245 T ES 13726245T ES 2822587 T3 ES2822587 T3 ES 2822587T3
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Prior art keywords
laser
laser source
frequency
infrared radiation
detection
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ES13726245T
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English (en)
Spanish (es)
Inventor
Damien Weidmann
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ITI Scotland Ltd
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ITI Scotland Ltd
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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO 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
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/06—Systems determining position data of a target
    • G01S17/08—Systems determining position data of a target for measuring distance only
    • G01S17/32—Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/255—Details, e.g. use of specially adapted sources, lighting or optical systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y20/00—Nanooptics, e.g. quantum optics or photonic crystals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO 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
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/88—Lidar systems specially adapted for specific applications
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO 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
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/88—Lidar systems specially adapted for specific applications
    • G01S17/95—Lidar systems specially adapted for specific applications for meteorological use
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO 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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/481—Constructional features, e.g. arrangements of optical elements
    • G01S7/4811—Constructional features, e.g. arrangements of optical elements common to transmitter and receiver
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO 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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/491—Details of non-pulse systems
    • G01S7/4911—Transmitters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/06—Illumination; Optics
    • G01N2201/061—Sources
    • G01N2201/06113—Coherent sources; lasers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/06—Illumination; Optics
    • G01N2201/063—Illuminating optical parts
    • G01N2201/0636—Reflectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/06—Illumination; Optics
    • G01N2201/066—Modifiable path; multiple paths in one sample
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/02—Structural details or components not essential to laser action
    • H01S5/022—Mountings; Housings
    • H01S5/0235—Method for mounting laser chips
    • H01S5/02355—Fixing laser chips on mounts
    • H01S5/02365—Fixing laser chips on mounts by clamping
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/02—Structural details or components not essential to laser action
    • H01S5/024—Arrangements for thermal management
    • H01S5/02407—Active cooling, e.g. the laser temperature is controlled by a thermo-electric cooler or water cooling
    • H01S5/02415—Active cooling, e.g. the laser temperature is controlled by a thermo-electric cooler or water cooling by using a thermo-electric cooler [TEC], e.g. Peltier element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/02—Structural details or components not essential to laser action
    • H01S5/024—Arrangements for thermal management
    • H01S5/02469—Passive cooling, e.g. where heat is removed by the housing as a whole or by a heat pipe without any active cooling element like a TEC
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/30—Structure or shape of the active region; Materials used for the active region
    • H01S5/34—Structure or shape of the active region; Materials used for the active region comprising quantum well or superlattice structures, e.g. single quantum well [SQW] lasers, multiple quantum well [MQW] lasers or graded index separate confinement heterostructure [GRINSCH] lasers
    • H01S5/3401—Structure or shape of the active region; Materials used for the active region comprising quantum well or superlattice structures, e.g. single quantum well [SQW] lasers, multiple quantum well [MQW] lasers or graded index separate confinement heterostructure [GRINSCH] lasers having no PN junction, e.g. unipolar lasers, intersubband lasers, quantum cascade lasers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
    • Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Analytical Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Nanotechnology (AREA)
  • Food Science & Technology (AREA)
  • Combustion & Propulsion (AREA)
  • Medicinal Chemistry (AREA)
  • Biophysics (AREA)
  • Optics & Photonics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
  • Optical Communication System (AREA)
ES13726245T 2012-02-22 2013-02-22 Sistema y método de detección de heterodinos Active ES2822587T3 (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1203042.5A GB2499616B (en) 2012-02-22 2012-02-22 Heterodyne detection system and method
PCT/GB2013/050448 WO2013124678A2 (en) 2012-02-22 2013-02-22 Heterodyne detection system and method

Publications (1)

Publication Number Publication Date
ES2822587T3 true ES2822587T3 (es) 2021-05-04

Family

ID=45940009

Family Applications (1)

Application Number Title Priority Date Filing Date
ES13726245T Active ES2822587T3 (es) 2012-02-22 2013-02-22 Sistema y método de detección de heterodinos

Country Status (8)

Country Link
US (1) US9366622B2 (https=)
EP (2) EP3761061B1 (https=)
JP (1) JP6371706B2 (https=)
AU (1) AU2013223813B2 (https=)
CA (1) CA2875314C (https=)
ES (1) ES2822587T3 (https=)
GB (1) GB2499616B (https=)
WO (1) WO2013124678A2 (https=)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2892934C (en) 2012-11-30 2021-06-22 Iti Scotland - Scottish Enterprise Method and apparatus for reducing speckle noise in an optical system
CN103901435B (zh) * 2014-03-11 2016-05-18 北京航空航天大学 一种全光纤光路全波形激光雷达系统
CN104037610B (zh) * 2014-07-01 2017-08-01 哈尔滨工业大学 基于热稳频和声光移频的单纵模激光器互锁方法和装置
CN104051947B (zh) * 2014-07-01 2017-05-17 哈尔滨工业大学 基于压电效应和声光移频的双纵模激光器互锁方法和装置
GB2541669A (en) * 2015-08-24 2017-03-01 Sgurrenergy Ltd Remote sensing device
CN105372673B (zh) * 2015-12-25 2018-01-26 西安电子科技大学 基于声光移频器的收发式一体逆合成孔径激光雷达系统
US11181626B2 (en) * 2016-03-14 2021-11-23 Plethron Inc. Injecting an RF local oscillator signal into an avalanche photo diode using photons emitted from a light emitting diode
US10067055B1 (en) 2016-05-11 2018-09-04 Pendar Technologies, Llc Devices and methods for coherent detection using chirped laser pulses
US20180038787A1 (en) * 2016-08-05 2018-02-08 Board Of Trustees Of The University Of Arkansas Field Deployable Soil Observation Topographic Differential Absorption LiDAR (SOTDiAL)
JP7024996B2 (ja) * 2017-10-30 2022-02-24 国立研究開発法人宇宙航空研究開発機構 モニタリングシステム
CN108267388B (zh) * 2018-02-02 2023-09-26 中国气象局广州热带海洋气象研究所 一种气溶胶散射系数吸湿增长测量仪及测量方法
DE102018204888A1 (de) * 2018-03-29 2019-10-02 Carl Zeiss Ag Vorrichtung zum Ermitteln eines Abstandes eines bewegten Objekts
US20190331797A1 (en) * 2018-04-25 2019-10-31 GM Global Technology Operations LLC Alternating chirp frequency modulated continuous wave doppler lidar
JP7169642B2 (ja) * 2018-11-28 2022-11-11 国立研究開発法人産業技術総合研究所 光学的測定装置及び測定方法
FR3096788B1 (fr) * 2019-05-29 2021-06-11 Thales Sa Système lidar comprenant un élément diffractif interférentiel et procédé d'imagerie lidar
CN112212897B (zh) * 2019-07-12 2021-12-03 清华大学 光声传感器、光声探测系统、方法、装置及存储介质
US12055659B2 (en) * 2019-12-27 2024-08-06 Waymo Llc Optical redirector device
US12468020B2 (en) 2019-12-27 2025-11-11 Waymo Llc Optical redirector device
UA129185C2 (uk) * 2020-04-16 2025-02-05 Володимир Дмитрович Вах Вузол приладу терморегуляції напівпровідникового лазера
CN111562236B (zh) * 2020-05-21 2023-01-13 中国科学院合肥物质科学研究院 同时测量大气多参数的星载激光外差系统地面模拟装置及方法
US20210373202A1 (en) * 2020-06-01 2021-12-02 Lockheed Martin Corporation Geometric phase and off-axis optics for reduced backscatter
EP4187283B1 (en) * 2020-07-30 2025-09-10 Shenzhen Yinwang Intelligent Technologies Co., Ltd. Laser radar and smart vehicle
CN112152730B (zh) * 2020-08-26 2023-04-18 南京长峰航天电子科技有限公司 一种基于三通道的体目标实现系统及方法
CN112505651B (zh) * 2020-12-23 2022-06-21 北京遥测技术研究所 一种用于大气探测激光雷达的自动化处理方法
EP4273581A4 (en) * 2021-01-29 2024-06-19 Shanghai Ruiyu Biotech Co. Ltd. LASER DISTANCE MEASUREMENT METHOD AND SYSTEM, FOCUSING METHOD AND SYSTEM, AND AUTOMATIC FOCUS ANALYSIS DEVICE
CN117546049A (zh) 2021-06-30 2024-02-09 三菱电机株式会社 激光雷达装置
CN115981022B (zh) * 2023-01-29 2025-04-15 中国科学院上海光学精密机械研究所 离轴抛物面镜失调的调节方法

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1221677A (en) 1968-04-16 1971-02-03 Cyril George Matthews Process for anodically cleaning and coating metal substrates
US4325635A (en) * 1980-10-07 1982-04-20 The United States Of America As Represented By The Secretary Of The Army Heterodyne indicial refractometer
US5751830A (en) * 1995-05-24 1998-05-12 Lockheed Martin Energy Systems, Inc. Method and apparatus for coherent imaging of infrared energy
JPH0926376A (ja) * 1995-07-11 1997-01-28 Advantest Corp Ｏｔｄｒ測定装置
JPH11108763A (ja) * 1997-09-30 1999-04-23 Seitai Hikarijoho Kenkyusho:Kk 光計測装置
JP2003090704A (ja) * 2001-09-20 2003-03-28 Sanyo Electric Co Ltd 光ヘテロダイン干渉計
US7492806B2 (en) * 2005-06-15 2009-02-17 Daylight Solutions, Inc. Compact mid-IR laser
JP5372349B2 (ja) * 2007-08-23 2013-12-18 浜松ホトニクス株式会社 量子カスケードレーザ素子
US7869474B2 (en) * 2008-01-10 2011-01-11 William Marsh Rice University Fast wavelength tuning techniques for external cavity lasers
JP2009218478A (ja) * 2008-03-12 2009-09-24 Sharp Corp 発振モード検出装置、発振モード制御装置、レーザシステム、発振モード検出方法、および、発振モード制御方法
US7986397B1 (en) * 2008-04-30 2011-07-26 Lockheed Martin Coherent Technologies, Inc. FMCW 3-D LADAR imaging systems and methods with reduced Doppler sensitivity
FR2934712B1 (fr) * 2008-08-01 2010-08-27 Thales Sa Procede de fabrication d'un dispositif optique d'analyse comportant un laser a cascades quantiques et un detecteur quantique.
DE102009001734A1 (de) * 2009-03-23 2011-02-24 Robert Bosch Gmbh Optikträger
JP5350940B2 (ja) * 2009-08-19 2013-11-27 浜松ホトニクス株式会社 レーザモジュール
GB0919854D0 (en) * 2009-11-12 2009-12-30 Stfc Science & Technology Detecting species in a dilute medium
US9025163B2 (en) * 2011-04-22 2015-05-05 The Trustess Of Princeton University Chirp modulation-based detection of chirped laser molecular dispersion spectra

Also Published As

Publication number Publication date
EP2817658A2 (en) 2014-12-31
EP3761061A1 (en) 2021-01-06
EP3761061B1 (en) 2025-09-17
EP2817658B1 (en) 2020-07-29
GB2499616A (en) 2013-08-28
GB201203042D0 (en) 2012-04-04
GB2499616B (en) 2017-03-22
AU2013223813A1 (en) 2014-09-11
CA2875314A1 (en) 2013-08-29
WO2013124678A2 (en) 2013-08-29
JP2015515606A (ja) 2015-05-28
CA2875314C (en) 2019-04-30
JP6371706B2 (ja) 2018-08-08
EP3761061C0 (en) 2025-09-17
AU2013223813B2 (en) 2017-02-16
US9366622B2 (en) 2016-06-14
US20150014543A1 (en) 2015-01-15
WO2013124678A3 (en) 2013-12-19

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