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WO2018172391A3 - Spectromètre de fourier comprenant un laser à cascade quantique à plusieurs modes, et procédé servant à examiner par spectroscopie un échantillon - Google Patents

Spectromètre de fourier comprenant un laser à cascade quantique à plusieurs modes, et procédé servant à examiner par spectroscopie un échantillon Download PDF

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Publication number
WO2018172391A3
WO2018172391A3 PCT/EP2018/057105 EP2018057105W WO2018172391A3 WO 2018172391 A3 WO2018172391 A3 WO 2018172391A3 EP 2018057105 W EP2018057105 W EP 2018057105W WO 2018172391 A3 WO2018172391 A3 WO 2018172391A3
Authority
WO
WIPO (PCT)
Prior art keywords
sample
qcl
tuning
resonator
laser
Prior art date
Application number
PCT/EP2018/057105
Other languages
German (de)
English (en)
Other versions
WO2018172391A2 (fr
Inventor
Benjamin RÖBEN
Martin Hempel
Xiang LÜ
Klaus Biermann
Lutz SCHROTTKE
Holger T. GRAHN
Original Assignee
Forschungsverbund Berlin E.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Forschungsverbund Berlin E.V. filed Critical Forschungsverbund Berlin E.V.
Publication of WO2018172391A2 publication Critical patent/WO2018172391A2/fr
Publication of WO2018172391A3 publication Critical patent/WO2018172391A3/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/28—Investigating the spectrum
    • G01J3/45—Interferometric spectrometry
    • G01J3/453—Interferometric spectrometry by correlation of the amplitudes
    • G01J3/4535—Devices with moving mirror
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/28—Investigating the spectrum
    • G01J3/42—Absorption spectrometry; Double beam spectrometry; Flicker spectrometry; Reflection spectrometry
    • 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
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/062—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes
    • H01S5/06209—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes in single-section lasers
    • H01S5/06213—Amplitude modulation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/28—Investigating the spectrum
    • G01J3/42—Absorption spectrometry; Double beam spectrometry; Flicker spectrometry; Reflection spectrometry
    • G01J3/433—Modulation spectrometry; Derivative spectrometry
    • G01J2003/4334—Modulation spectrometry; Derivative spectrometry by modulation of source, e.g. current modulation
    • 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
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/062—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes
    • H01S5/06209—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes in single-section lasers
    • H01S5/0622—Controlling the frequency of the radiation
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Spectrometry And Color Measurement (AREA)

Abstract

L'invention concerne un spectromètre de Fourier servant à examiner par spectroscopie un échantillon. Le spectromètre de Fourier comprend un laser à cascade quantique (QCL) à plusieurs modes qui contient une zone QCL active dans un résonateur laser qui est configurée pour générer une lumière laser présentant des fréquences d'émission conformément à une pluralité de modes du résonateur laser, un système d'excitation qui est configuré pour exciter de manière électrique la zone QCL active au moyen d'un courant de pompage électrique, et un système de syntonisation qui permet de régler les modes de résonateur ; un interféromètre servant à générer un interférogramme à base de lumière laser ; un système détecteur servant à détecter l'interférogramme après une interaction avec l'échantillon et servant à détecter un signal de détecteur, qui renferme l'interférogramme détecté, pendant une durée de mesure de détecteur ; et un système d'analyse qui est configuré pour détecter un spectre de l'échantillon par une transformée de Fourier de l'interférogramme détecté. Le système de syntonisation du laser QCL est configuré pour faire varier périodiquement de manière spectrale les modes de résonateur avec une période temporelle de syntonisation inférieure à 1 min respectivement dans un intervalle de syntonisation spectral qui est au moins égal à l'espacement entre des modes contigus du résonateur laser. La zone QCL active est configurée pour générer la lumière laser présentant des fréquences d'émission situées dans la plage allant de 1 THz à 6 THz. Les fréquences d'émission de la lumière laser couvrent une plage d'émissions spectrale d'au moins 50 GHz. Le système détecteur est mis au point pour pondérer dans le temps le signal de détecteur sur la période temporelle de syntonisation du système de syntonisation du laser QCL. L'invention concerne un procédé servant à examiner par spectroscopie un échantillon à l'aide du spectromètre.
PCT/EP2018/057105 2017-03-22 2018-03-21 Spectromètre de fourier comprenant un laser à cascade quantique à plusieurs modes, et procédé servant à examiner par spectroscopie un échantillon WO2018172391A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017002874.5A DE102017002874B4 (de) 2017-03-22 2017-03-22 Fourier-Spektrometer mit einem Mehrmoden-Quantenkaskadenlaser, und Verfahren zur spektroskopischen Untersuchung einer Probe
DE102017002874.5 2017-03-22

Publications (2)

Publication Number Publication Date
WO2018172391A2 WO2018172391A2 (fr) 2018-09-27
WO2018172391A3 true WO2018172391A3 (fr) 2018-11-29

Family

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PCT/EP2018/057105 WO2018172391A2 (fr) 2017-03-22 2018-03-21 Spectromètre de fourier comprenant un laser à cascade quantique à plusieurs modes, et procédé servant à examiner par spectroscopie un échantillon

Country Status (2)

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DE (1) DE102017002874B4 (fr)
WO (1) WO2018172391A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114062311A (zh) * 2020-08-06 2022-02-18 昱辉激光科技(泰州)有限公司 量子级联激光光谱仪

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015163965A2 (fr) * 2014-02-04 2015-10-29 Board Of Regents, The University Of Texas System Source de rayonnement térahertz accordable monolithique utilisant un mélange de fréquence non linéaire dans des lasers à cascade quantique

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
BENJAMIN RÖBEN ET AL: "Terahertz quantum-cascade lasers as high-power and wideband, gapless sources for spectroscopy", OPTICS EXPRESS, vol. 25, no. 14, 29 June 2017 (2017-06-29), pages 16282, XP055496165, DOI: 10.1364/OE.25.016282 *
GUREL K ET AL: "Characterization of a new frequency tuning and modulation mechanism for spectroscopy in a quantum cascade laser", 2016 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO), OSA, 5 June 2016 (2016-06-05), pages 1 - 2, XP033024374 *
H.-W. HÜBERS ET AL: "High Resolution Terahertz Spectroscopy with Quantum Cascade Lasers", JOURNAL OF INFRARED, MILLIMETER AND TERAHERTZ WAVES, vol. 34, no. 5-6, 4 April 2013 (2013-04-04), US, pages 325 - 341, XP055497352, ISSN: 1866-6892, DOI: 10.1007/s10762-013-9973-7 *
M. WIENOLD ET AL: "Frequency comb operation of long-cavity terahertz quantum-cascade lasers", PROCEEDINGS OF SPIE, vol. 9767, 7 March 2016 (2016-03-07), 1000 20th St. Bellingham WA 98225-6705 USA, pages 97671A, XP055496067, ISSN: 0277-786X, ISBN: 978-1-5106-1533-5, DOI: 10.1117/12.2208128 *
SCHROTTKE L ET AL: "Terahertz GaAs/AlAs quantum-cascade lasers", APPLIED PHYSICS LETTERS, A I P PUBLISHING LLC, US, vol. 108, no. 10, 7 March 2016 (2016-03-07), XP012205588, ISSN: 0003-6951, [retrieved on 19010101], DOI: 10.1063/1.4943657 *

Also Published As

Publication number Publication date
DE102017002874B4 (de) 2022-04-28
DE102017002874A1 (de) 2018-09-27
WO2018172391A2 (fr) 2018-09-27

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