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Simplified Stokes polarimeter based on division-of-amplitude

Negara, C.; Li, Zheng; Längle, T.; Beyerer, Jürgen

Abstract:
A polarization state detector (PSD) measures the state of polarization of the detected light. The state of polarization is fully described by the Stokes vector containing four Stokes parameters. A division-of-amplitude photopolarimeter (DOAP) measures the four Stokes parameters by simultaneously acquiring four intensities using photodetectors. A key component of the DOAP is the first beam splitter, which splits up the incoming beam into two beams. The effect of the beam splitter on the state of polarization of the reflected (r) and transmitted (t) beam is determined by six parameters: R, T, ψr, ψt, Δr, and Δt. R and T are the reflectance and transmittance, and (ψr, Δr) and (ψt, Δt) are the ellipsometric parameters of the beam splitter in reflection and transmission, respectively. To measure the Stokes vector with high accuracy, the six optical parameters must be chosen appropriately. In previous work, the optimal parameters of the beam splitter have been determined as R = T = 1/2, cos2 2ψr = 1/3, ψt = π/2 - ψr, and Δr-Δt modulo π=π/2 by calculating the maximum of the absolute value of determinant of the instrument matrix. Using additional quarter-wave plates eliminates the constraint on the retardance and hence simplifies the manufacturing process of the beam splitter, especially when broadband application is intended. ... mehr

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Originalveröffentlichung
DOI: 10.1117/12.2532399
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Zitationen: 1
Zugehörige Institution(en) am KIT Institut für Anthropomatik und Robotik (IAR)
Publikationstyp Proceedingsbeitrag
Publikationsjahr 2019
Sprache Englisch
Identifikator ISBN: 978-1-5106-2981-3
ISSN: 0277-786X
KITopen-ID: 1000099530
Erschienen in Photonics and Education in Measurement Science 2019. Ed.: M. Rosenberger
Veranstaltung Joint TC1 - TC2 International Symposium on Photonics and Education in Measurement Science (2019), Jena, Deutschland, 17.09.2019 – 19.09.2019
Verlag Society of Photo-optical Instrumentation Engineers (SPIE)
Seiten Art.-Nr.: 111441B
Serie Proceedings of SPIE ; 11144
Schlagwörter polarimetry, ellipsometry, Stokes vector, polarization state detector, division-of-amplitude, beam splitter, retarder, quarter-wave plate
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