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Single-shot polarization digital holography for recording stimulated Raman scattering signal for time-resolved measurement of gaseous species
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Strömningslära och experimentell mekanik.ORCID-id: 0000-0003-4853-870X
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Strömningslära och experimentell mekanik.ORCID-id: 0000-0001-8355-2414
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Strömningslära och experimentell mekanik.ORCID-id: 0000-0003-4879-8261
2017 (engelsk)Inngår i: Applied Optics, ISSN 1559-128X, E-ISSN 2155-3165, Vol. 56, nr 36, s. 10016-10023Artikkel i tidsskrift (Fagfellevurdert) 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. 

sted, utgiver, år, opplag, sider
Optical Society of America, 2017. Vol. 56, nr 36, s. 10016-10023
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Experimentell mekanik
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URN: urn:nbn:se:ltu:diva-67137DOI: 10.1364/AO.56.010016ISI: 000418416800023Scopus ID: 2-s2.0-85038405392OAI: oai:DiVA.org:ltu-67137DiVA, id: diva2:1170124
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Validerad;2018;Nivå 2;2018-01-02 (svasva)

Tilgjengelig fra: 2018-01-02 Laget: 2018-01-02 Sist oppdatert: 2018-01-11bibliografisk kontrollert

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