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Single-shot polarization digital holography for recording stimulated Raman scattering signal for time-resolved measurement of gaseous species
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0003-4853-870X
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0001-8355-2414
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0003-4879-8261
2017 (English)In: Applied Optics, ISSN 1559-128X, E-ISSN 2155-3165, Vol. 56, no 36, 10016-10023 p.Article in journal (Refereed) Published
Abstract [en]

The stimulated Raman scattering (SRS) process is sensitive to the relation between the polarization direction of the two laser beams (the pump and the Stokes) that generate it. In this paper, we made use of the polarization sensitivity of the SRS process and used polarization-resolved pulsed digital holography to record the signal from one single-shot hologram. The pump beam polarization was kept vertical, while the Stokes beam polarization was 45 deg. The two polarization components of the Stokes beam were recorded in a single hologram by blending the Stokes beam with two reference beams with orthogonal polarization on the detector. The two components of the Stokes beam were separated in the Fourier domain, and the corresponding intensity maps were calculated. The vertically polarized component of the Stokes beam was amplified due to the SRS process, while the horizontal component experienced no gain. The difference between the vertically and horizontally polarized intensity maps, respectively, was calculated and Fourier transformed to separate the gain signal in the spatial frequency domain. The method was demonstrated on methane (CH4) gas at a pressure of 12 bars. Results show that SRS polarization holography is a promising technique for recording the SRS signal from one single-shot hologram for time-resolved monitoring of specific species. 

Place, publisher, year, edition, pages
Optical Society of America, 2017. Vol. 56, no 36, 10016-10023 p.
National Category
Applied Mechanics
Research subject
Experimental Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-67137DOI: 10.1364/AO.56.010016ISI: 000418416800023Scopus ID: 2-s2.0-85038405392OAI: oai:DiVA.org:ltu-67137DiVA: diva2:1170124
Note

Validerad;2018;Nivå 2;2018-01-02 (svasva)

Available from: 2018-01-02 Created: 2018-01-02 Last updated: 2018-01-11Bibliographically approved

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Amer, EynasGren, PerSjödahl, Mikael
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