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Novel non-linear optical techniques for diagnostics: Laser-induced gratings and two-colour four-wave mixing. / Hemmerling, Bernd; Radi, Peter; Stampanoni-Panariello, Anna; Kouzov, Alexander; Kozlov, Dimitrii.

In: Comptes Rendus de l'Academie des Sciences - Series IV: Physics, Astrophysics, Vol. 2, No. 7, 01.09.2001, p. 1001-1012.

Research output: Contribution to journal › Article › peer-review

Harvard

Hemmerling, B, Radi, P, Stampanoni-Panariello, A, Kouzov, A & Kozlov, D 2001, 'Novel non-linear optical techniques for diagnostics: Laser-induced gratings and two-colour four-wave mixing', Comptes Rendus de l'Academie des Sciences - Series IV: Physics, Astrophysics, vol. 2, no. 7, pp. 1001-1012. https://doi.org/10.1016/S1296-2147(01)01241-0

APA

Hemmerling, B., Radi, P., Stampanoni-Panariello, A., Kouzov, A., & Kozlov, D. (2001). Novel non-linear optical techniques for diagnostics: Laser-induced gratings and two-colour four-wave mixing. Comptes Rendus de l'Academie des Sciences - Series IV: Physics, Astrophysics, 2(7), 1001-1012. https://doi.org/10.1016/S1296-2147(01)01241-0

Vancouver

Hemmerling B, Radi P, Stampanoni-Panariello A, Kouzov A, Kozlov D. Novel non-linear optical techniques for diagnostics: Laser-induced gratings and two-colour four-wave mixing. Comptes Rendus de l'Academie des Sciences - Series IV: Physics, Astrophysics. 2001 Sep 1;2(7):1001-1012. https://doi.org/10.1016/S1296-2147(01)01241-0

Author

Hemmerling, Bernd ; Radi, Peter ; Stampanoni-Panariello, Anna ; Kouzov, Alexander ; Kozlov, Dimitrii. / Novel non-linear optical techniques for diagnostics: Laser-induced gratings and two-colour four-wave mixing. In: Comptes Rendus de l'Academie des Sciences - Series IV: Physics, Astrophysics. 2001 ; Vol. 2, No. 7. pp. 1001-1012.

BibTeX

@article{37ad2caf2bd54115b5a941194e4a92a9,
title = "Novel non-linear optical techniques for diagnostics: Laser-induced gratings and two-colour four-wave mixing",
abstract = "Electrostriction, population transfer caused by absorption of laser energy and subsequent thermalization are the most important mechanisms responsible for the formation of laser-induced gratings. Applying time resolved light diffraction from electrostrictive gratings allows for the measurements of thermodynamic properties like temperature, gas composition, and flow velocity. Thermal gratings can be employed as a very sensitive spectroscopic tool. The Two-Colour Four-Wave Mixing (TCFWM) signal formed by a non-resonant pump laser and a resonant probe laser in an acetylene/air diffusion flame comprises of contributions due to soot and C2, the latter is generated by vaporising the soot. Profile measurements across the flame have shown that the signal composition changes within the flame. Intermediate level labelling by Two-Colour Resonant Four-Wave Mixing Spectroscopy (TC-RFWM) is applied to reduce the spectral complexity of molecular spectra. In addition, we observe extra resonances forbidden by a conventional three-level scheme in OH- and NH-containing flames. A detailed investigation shows that the newly observed TC-RFWM resonances are induced by collisional energy transfer within the population, alignment and orientation gratings formed in both electronic states that are coupled to the laser fields. {\textcopyright} 2001 Acad{\'e}mie des sciences/{\'E}ditions scientifiques et m{\'e}dicales Elsevier SAS.",
keywords = "Collision processes, Energy transfer processes, Laser-induced gratings, M{\'e}lange {\`a} quatre ondes {\`a} deux couleurs, R{\'e}seaux induits par laser, Soot diagnostics, Thermom{\'e}trie, Thermometry, Two-colour four-wave mixing, Velocimetry",
author = "Bernd Hemmerling and Peter Radi and Anna Stampanoni-Panariello and Alexander Kouzov and Dimitrii Kozlov",
year = "2001",
month = sep,
day = "1",
doi = "10.1016/S1296-2147(01)01241-0",
language = "English",
volume = "2",
pages = "1001--1012",
journal = "Academie des Sciences. Comptes Rendus. Serie 4: Physique, Astrophysique",
issn = "1296-2147",
publisher = "Elsevier",
number = "7",

}

RIS

TY - JOUR

T1 - Novel non-linear optical techniques for diagnostics: Laser-induced gratings and two-colour four-wave mixing

AU - Hemmerling, Bernd

AU - Radi, Peter

AU - Stampanoni-Panariello, Anna

AU - Kouzov, Alexander

AU - Kozlov, Dimitrii

PY - 2001/9/1

Y1 - 2001/9/1

N2 - Electrostriction, population transfer caused by absorption of laser energy and subsequent thermalization are the most important mechanisms responsible for the formation of laser-induced gratings. Applying time resolved light diffraction from electrostrictive gratings allows for the measurements of thermodynamic properties like temperature, gas composition, and flow velocity. Thermal gratings can be employed as a very sensitive spectroscopic tool. The Two-Colour Four-Wave Mixing (TCFWM) signal formed by a non-resonant pump laser and a resonant probe laser in an acetylene/air diffusion flame comprises of contributions due to soot and C2, the latter is generated by vaporising the soot. Profile measurements across the flame have shown that the signal composition changes within the flame. Intermediate level labelling by Two-Colour Resonant Four-Wave Mixing Spectroscopy (TC-RFWM) is applied to reduce the spectral complexity of molecular spectra. In addition, we observe extra resonances forbidden by a conventional three-level scheme in OH- and NH-containing flames. A detailed investigation shows that the newly observed TC-RFWM resonances are induced by collisional energy transfer within the population, alignment and orientation gratings formed in both electronic states that are coupled to the laser fields. © 2001 Académie des sciences/Éditions scientifiques et médicales Elsevier SAS.

AB - Electrostriction, population transfer caused by absorption of laser energy and subsequent thermalization are the most important mechanisms responsible for the formation of laser-induced gratings. Applying time resolved light diffraction from electrostrictive gratings allows for the measurements of thermodynamic properties like temperature, gas composition, and flow velocity. Thermal gratings can be employed as a very sensitive spectroscopic tool. The Two-Colour Four-Wave Mixing (TCFWM) signal formed by a non-resonant pump laser and a resonant probe laser in an acetylene/air diffusion flame comprises of contributions due to soot and C2, the latter is generated by vaporising the soot. Profile measurements across the flame have shown that the signal composition changes within the flame. Intermediate level labelling by Two-Colour Resonant Four-Wave Mixing Spectroscopy (TC-RFWM) is applied to reduce the spectral complexity of molecular spectra. In addition, we observe extra resonances forbidden by a conventional three-level scheme in OH- and NH-containing flames. A detailed investigation shows that the newly observed TC-RFWM resonances are induced by collisional energy transfer within the population, alignment and orientation gratings formed in both electronic states that are coupled to the laser fields. © 2001 Académie des sciences/Éditions scientifiques et médicales Elsevier SAS.

KW - Collision processes

KW - Energy transfer processes

KW - Laser-induced gratings

KW - Mélange à quatre ondes à deux couleurs

KW - Réseaux induits par laser

KW - Soot diagnostics

KW - Thermométrie

KW - Thermometry

KW - Two-colour four-wave mixing

KW - Velocimetry

UR - http://www.scopus.com/inward/record.url?scp=0344031823&partnerID=8YFLogxK

U2 - 10.1016/S1296-2147(01)01241-0

DO - 10.1016/S1296-2147(01)01241-0

M3 - Article

AN - SCOPUS:0344031823

VL - 2

SP - 1001

EP - 1012

JO - Academie des Sciences. Comptes Rendus. Serie 4: Physique, Astrophysique

JF - Academie des Sciences. Comptes Rendus. Serie 4: Physique, Astrophysique

SN - 1296-2147

IS - 7

ER -

ID: 104351008