AU2013223813B2 - Heterodyne detection system and method - Google Patents

Heterodyne detection system and method Download PDF

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Publication number
AU2013223813B2
AU2013223813B2 AU2013223813A AU2013223813A AU2013223813B2 AU 2013223813 B2 AU2013223813 B2 AU 2013223813B2 AU 2013223813 A AU2013223813 A AU 2013223813A AU 2013223813 A AU2013223813 A AU 2013223813A AU 2013223813 B2 AU2013223813 B2 AU 2013223813B2
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infra
detection system
laser
laser source
red radiation
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AU2013223813A1 (en
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Damien Weidmann
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ITI Scotland Ltd
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ITI Scotland Ltd
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    • 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
    • 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
    • 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
    • G01S17/02—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
    • 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
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001—Technical content checked by a classifier
    • H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
    • 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)
  • Combustion & Propulsion (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Biophysics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
  • Optical Communication System (AREA)
AU2013223813A 2012-02-22 2013-02-22 Heterodyne detection system and method Active AU2013223813B2 (en)

Applications Claiming Priority (3)

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

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AU2013223813A1 AU2013223813A1 (en) 2014-09-11
AU2013223813B2 true AU2013223813B2 (en) 2017-02-16

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

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2926190B1 (en) 2012-11-30 2021-03-24 ITI Scotland Limited 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
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
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
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
US12468020B2 (en) 2019-12-27 2025-11-11 Waymo Llc Optical redirector device
EP4066009A4 (en) * 2019-12-27 2023-11-29 Waymo LLC OPTICAL DIVERTER
WO2021024046A1 (ru) * 2020-04-16 2021-02-11 Владимир ВАХ Узел прибора терморегуляции полупроводникового 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
CN114814882A (zh) * 2020-07-30 2022-07-29 华为技术有限公司 一种激光雷达和智能车辆
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
DE112021007580B4 (de) 2021-06-30 2025-01-09 Mitsubishi Electric Corporation Laserradarvorrichtung
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

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011058330A1 (en) * 2009-11-12 2011-05-19 The Science And Technology Facilities Council Detecting species in a dilute medium

Family Cites Families (15)

* 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
US9025163B2 (en) * 2011-04-22 2015-05-05 The Trustess Of Princeton University Chirp modulation-based detection of chirped laser molecular dispersion spectra

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011058330A1 (en) * 2009-11-12 2011-05-19 The Science And Technology Facilities Council Detecting species in a dilute medium

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EP3761061B1 (en) 2025-09-17
EP3761061A1 (en) 2021-01-06
ES2822587T3 (es) 2021-05-04
US20150014543A1 (en) 2015-01-15
GB201203042D0 (en) 2012-04-04
AU2013223813A1 (en) 2014-09-11
GB2499616B (en) 2017-03-22
US9366622B2 (en) 2016-06-14
CA2875314C (en) 2019-04-30
JP2015515606A (ja) 2015-05-28
EP2817658B1 (en) 2020-07-29
GB2499616A (en) 2013-08-28
JP6371706B2 (ja) 2018-08-08
WO2013124678A2 (en) 2013-08-29
EP3761061C0 (en) 2025-09-17
EP2817658A2 (en) 2014-12-31
WO2013124678A3 (en) 2013-12-19
CA2875314A1 (en) 2013-08-29

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