JP4414885B2 - コヒーレント吸収差ライダー(dial) - Google Patents
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- JP4414885B2 JP4414885B2 JP2004535640A JP2004535640A JP4414885B2 JP 4414885 B2 JP4414885 B2 JP 4414885B2 JP 2004535640 A JP2004535640 A JP 2004535640A JP 2004535640 A JP2004535640 A JP 2004535640A JP 4414885 B2 JP4414885 B2 JP 4414885B2
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Classifications
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- 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
- G01S7/4818—Constructional features, e.g. arrangements of optical elements using optical fibres
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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
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths
-
- 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
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
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- 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
- 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
- G01S7/483—Details of pulse systems
- G01S7/486—Receivers
- G01S7/487—Extracting wanted echo signals, e.g. pulse detection
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- 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
- G01S7/497—Means for monitoring or calibrating
-
- 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
- G01S17/87—Combinations of systems using electromagnetic waves other than radio waves
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- 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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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Electromagnetism (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Optical Radar Systems And Details Thereof (AREA)
- Telephone Function (AREA)
Description
ここで、以下の図面を参照して、例のみを介して、本発明を説明する。
本発明の機構が、どのようにして、大気中のガス種のリアルタイムのDIAL測定を提供できるかを実証するために、実験を行った。
(α1―α2)L=ln(T1/T2) (1)
Claims (12)
- 別個の波長の少なくとも2つの成分光ビームを含む組合せ光ビームを遠隔ターゲットに向け、各成分光ビームと関連する局部発振ビームを形成する送信部と、
前記遠隔ターゲットから戻された光を受信し、前記受信光をその関連する局部発振ビームとコヒーレントに混合する受信部と、
を備えるコヒーレント差分吸収ライダー(DIAL)装置であって、
前記送信部から各成分光ビームの一部を抽出する手段、該抽出された各成分光ビームとその関連する局部発振ビームとの間に周波数差を持たせる手段、及び、前記抽出された各成分光ビームを前記受信部内に導く手段を備える信号訂正手段をさらに備える、
ことを特徴とするコヒーレント差分吸収ライダー(DIAL)装置。 - 前記少なくとも2つの成分光ビームの各々と前記関連する局部発振ビームとの間に周波数差を持たせる手段、
をさらに備えることを特徴とする請求項1記載のDIAL装置。 - 前記組合せ光ビームが、前記遠隔ターゲットへの伝送の前に、光ファイバケーブルを通して送られる
ことを特徴とする前記請求項のいずれかに記載のDIAL装置。 - 前記送信部が、第一の光学配置を使って、前記遠隔ターゲットに光を集中させ、かつ、前記受信部が、第二の代替の光学配置を使って、前記遠隔ターゲットからの光を集める
ことを特徴とする前記請求項のいずれかに記載のDIAL装置。 - 前記少なくとも2つの成分光ビームの各々が別個のレーザー源によって生成される
ことを特徴とする前記請求項のいずれかに記載のDIAL装置。 - 前記送信部が、1つのレーザー源、前記レーザー源によって出力された前記光ビームを少なくとも2つの成分光ビームに分ける手段、及び、前記成分光ビーム間に周波数差を持たせる手段を備える
ことを特徴とする請求項1から請求項4までのいずれか1項に記載のDIAL装置。 - 周波数差を持たせる一又はそれ以上の前記手段が音響光学変調器を備える
ことを特徴とする前記請求項のいずれかに記載のDIAL装置。 - 前記受信光及び/又は前記抽出された成分光ビームの偏光状態を、前記関連する局部発振ビームの偏光状態に対して制御するように構成された少なくとも1つの偏光コントローラ、
をさらに備えることを特徴とする前記請求項のいずれかに記載のDIAL装置。 - 前記送信部が、前記少なくとも2つの成分光ビームのうちの一又はそれ以上の輝度を増幅するための少なくとも1つの光増幅器をさらに備える
ことを特徴とする前記請求項のいずれかに記載のDIAL装置。 - 前記信号訂正手段が、少なくとも1つの遅延線を付加的に備える
ことを特徴とする前記請求項のいずれかに記載のDIAL装置。 - 前記少なくとも2つの成分光ビームの一方の波長が、対象のガス種の吸収のピークと一致するように選択される
ことを特徴とする前記請求項のいずれかに記載のDIAL装置。 - コヒーレントDIAL装置における正規化信号を提供する方法であって、
前記方法において、2つの波長の輻射がターゲットへと伝送され、戻り輻射は局部発振ビームとコヒーレントに混合され、さらに該方法は、
前記装置の伝送パスから、前記2つの波長の輻射を抽出するステップ、
前記抽出された輻射と、前記局部発振ビームとの間に、周波数差を持たせるステップ、及び、
前記抽出された輻射を、前記装置の受信パス内に入力するステップ、
を含むことを特徴とする方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB0220914.6A GB0220914D0 (en) | 2002-09-10 | 2002-09-10 | Lidar apparatus and method |
PCT/GB2003/003882 WO2004025324A1 (en) | 2002-09-10 | 2003-09-08 | Coherent differential absorption lidar (dial) |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2005538374A JP2005538374A (ja) | 2005-12-15 |
JP2005538374A5 JP2005538374A5 (ja) | 2006-10-19 |
JP4414885B2 true JP4414885B2 (ja) | 2010-02-10 |
Family
ID=9943752
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004535640A Expired - Lifetime JP4414885B2 (ja) | 2002-09-10 | 2003-09-08 | コヒーレント吸収差ライダー(dial) |
Country Status (8)
Country | Link |
---|---|
US (1) | US7397568B2 (ja) |
EP (1) | EP1537442B1 (ja) |
JP (1) | JP4414885B2 (ja) |
AT (1) | ATE487151T1 (ja) |
AU (1) | AU2003263327A1 (ja) |
DE (1) | DE60334810D1 (ja) |
GB (1) | GB0220914D0 (ja) |
WO (1) | WO2004025324A1 (ja) |
Families Citing this family (62)
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GB0421747D0 (en) * | 2004-09-30 | 2004-11-03 | British Telecomm | Distributed backscattering |
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EP1708388A1 (en) * | 2005-03-31 | 2006-10-04 | British Telecommunications Public Limited Company | Communicating information |
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US5157257A (en) | 1990-06-18 | 1992-10-20 | Lasen, Inc. | Mid-infrared light hydrocarbon DIAL LIDAR |
US5767519A (en) * | 1996-03-01 | 1998-06-16 | The Aerospace Corporation | Ambient-normalized differential absorption lidar system and method |
DE19613805C1 (de) * | 1996-04-06 | 1997-12-11 | Deutsche Forsch Luft Raumfahrt | Verfahren und Einrichtung zur Fernerkundung von Spurengasen |
US6621561B2 (en) * | 2000-09-22 | 2003-09-16 | Virginia Tech Intellectual Properties | Doppler rotational velocity sensor |
GB0228890D0 (en) * | 2002-12-11 | 2003-01-15 | Qinetiq Ltd | Laser radar apparatus |
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ATE487151T1 (de) | 2010-11-15 |
DE60334810D1 (de) | 2010-12-16 |
AU2003263327A1 (en) | 2004-04-30 |
JP2005538374A (ja) | 2005-12-15 |
US7397568B2 (en) | 2008-07-08 |
GB0220914D0 (en) | 2002-10-23 |
US20060011840A1 (en) | 2006-01-19 |
EP1537442B1 (en) | 2010-11-03 |
WO2004025324A1 (en) | 2004-03-25 |
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