Absolute Measurement of Coherent Backscattering Using a Spatial Light Modulator for Coherence Modification
Coherent backscattering is an interference phenomenon that occurs in the backwards direction of the incident illumination. It arises from photons traveling the same path in opposite directions within a scattering medium. Accurately determining the background signal for normalization can be challengi...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-07-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/12/7/685 |
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| author | Karsten Pink Niklas Fritzsche Manuel Petzi Alwin Kienle Florian Foschum |
| author_facet | Karsten Pink Niklas Fritzsche Manuel Petzi Alwin Kienle Florian Foschum |
| author_sort | Karsten Pink |
| collection | DOAJ |
| description | Coherent backscattering is an interference phenomenon that occurs in the backwards direction of the incident illumination. It arises from photons traveling the same path in opposite directions within a scattering medium. Accurately determining the background signal for normalization can be challenging in such measurements. This study investigates the use of a spatial light modulator to control spatial coherence, effectively switching the interference on and off. This approach enables independent, absolute measurements of both the signal and background across the full angular detection range without modifying the experimental setup. We demonstrate this method experimentally, highlighting the importance of accurate background determination in coherent backscattering measurements using a Fourier-based setup. Additionally, we demonstrate that measurements normalized to the correct background closely match Monte Carlo simulations of the coherent backscattering signal. |
| format | Article |
| id | doaj-art-d5624addedcf4a7f9dd785d431957b65 |
| institution | DOAJ |
| issn | 2304-6732 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj-art-d5624addedcf4a7f9dd785d431957b652025-08-20T03:08:13ZengMDPI AGPhotonics2304-67322025-07-0112768510.3390/photonics12070685Absolute Measurement of Coherent Backscattering Using a Spatial Light Modulator for Coherence ModificationKarsten Pink0Niklas Fritzsche1Manuel Petzi2Alwin Kienle3Florian Foschum4Institut für Lasertechnologien in der Medizin und Meßtechnik an der Universität Ulm, 89081 Ulm, GermanyInstitut für Lasertechnologien in der Medizin und Meßtechnik an der Universität Ulm, 89081 Ulm, GermanyInstitut für Lasertechnologien in der Medizin und Meßtechnik an der Universität Ulm, 89081 Ulm, GermanyInstitut für Lasertechnologien in der Medizin und Meßtechnik an der Universität Ulm, 89081 Ulm, GermanyInstitut für Lasertechnologien in der Medizin und Meßtechnik an der Universität Ulm, 89081 Ulm, GermanyCoherent backscattering is an interference phenomenon that occurs in the backwards direction of the incident illumination. It arises from photons traveling the same path in opposite directions within a scattering medium. Accurately determining the background signal for normalization can be challenging in such measurements. This study investigates the use of a spatial light modulator to control spatial coherence, effectively switching the interference on and off. This approach enables independent, absolute measurements of both the signal and background across the full angular detection range without modifying the experimental setup. We demonstrate this method experimentally, highlighting the importance of accurate background determination in coherent backscattering measurements using a Fourier-based setup. Additionally, we demonstrate that measurements normalized to the correct background closely match Monte Carlo simulations of the coherent backscattering signal.https://www.mdpi.com/2304-6732/12/7/685coherent backscatteringspatial light modulationspatial coherence modificationmonte carlo simulationabsolute measurementsdiffraction |
| spellingShingle | Karsten Pink Niklas Fritzsche Manuel Petzi Alwin Kienle Florian Foschum Absolute Measurement of Coherent Backscattering Using a Spatial Light Modulator for Coherence Modification Photonics coherent backscattering spatial light modulation spatial coherence modification monte carlo simulation absolute measurements diffraction |
| title | Absolute Measurement of Coherent Backscattering Using a Spatial Light Modulator for Coherence Modification |
| title_full | Absolute Measurement of Coherent Backscattering Using a Spatial Light Modulator for Coherence Modification |
| title_fullStr | Absolute Measurement of Coherent Backscattering Using a Spatial Light Modulator for Coherence Modification |
| title_full_unstemmed | Absolute Measurement of Coherent Backscattering Using a Spatial Light Modulator for Coherence Modification |
| title_short | Absolute Measurement of Coherent Backscattering Using a Spatial Light Modulator for Coherence Modification |
| title_sort | absolute measurement of coherent backscattering using a spatial light modulator for coherence modification |
| topic | coherent backscattering spatial light modulation spatial coherence modification monte carlo simulation absolute measurements diffraction |
| url | https://www.mdpi.com/2304-6732/12/7/685 |
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