{"id":393,"date":"2017-03-29T14:26:55","date_gmt":"2017-03-29T14:26:55","guid":{"rendered":"https:\/\/beta.research.ece.ncsu.edu\/osl\/?p=393"},"modified":"2017-03-29T14:26:55","modified_gmt":"2017-03-29T14:26:55","slug":"false-signature-reduction-in-channeled-spectropolarimetry","status":"publish","type":"post","link":"https:\/\/research.ece.ncsu.edu\/osl\/2017\/03\/29\/false-signature-reduction-in-channeled-spectropolarimetry\/","title":{"rendered":"False signature reduction in channeled   spectropolarimetry"},"content":{"rendered":"<p>Abstract. Channeled spectropolarimetry measures the complete polarization state of light, using a single spectrum, by amplitude modulating the Stokes parameters onto spectral carrier frequencies. However, spectral features that are not band limited in the Fourier transform domain, such as narrow-band atomic absorption lines, can generate false polarimetric signatures. We present a false-signature \u0001aliasing\u0002reduction technique that reduces the error induced by these non-band-limited features. Additionally, the spectral resolution of the S0 Stokes parameter is improved, up to the maximum resolution offered by the spectrometer. A theoretical model for implementing the technique on a Fourier transform infrared spectrometer is presented, including an enhanced model that accounts for dichroism within the crystal. The approach is experimentally demonstrated in the middle-wavelength infrared \u00013\u20135 \u0001m\u0002 with the use of two multiple-order yttrium vanadate retarders. Additional results demonstrating the technique for wavelengths spanning 2.5\u201315 \u0001m are obtained using cadmium sulfide retarders. Reconstructions are compared to conventional channeled spectropolarimetric reconstructions from the same system.<\/p>\n<div class=\"csl-bib-body\">\n<div class=\"csl-entry\">\n<div class=\"csl-left-margin\">J. Craven and M. W. Kudenov, &#8220;False signature reduction in channeled spectropolarimetry,&#8221; Opt. Eng <b>49<\/b>, 053602\u2013053602 (2010).<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Abstract. Channeled spectropolarimetry measures the complete polarization state of light, using a single spectrum, by amplitude modulating the Stokes parameters onto spectral carrier frequencies. However,&#8230;<\/p>\n","protected":false},"author":103,"featured_media":394,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[6],"tags":[],"class_list":["post-393","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-research-papers"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Abstract. Channeled spectropolarimetry measures the complete polarization state of light, using a single spectrum, by amplitude modulating the Stokes parameters onto spectral carrier frequencies. However, spectral features that are not band limited in the Fourier transform domain, such as narrow-band atomic absorption lines, can generate false polarimetric signatures. We present a false-signature \u0001aliasing\u0002reduction technique that\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"mwkudeno\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/research.ece.ncsu.edu\/osl\/2017\/03\/29\/false-signature-reduction-in-channeled-spectropolarimetry\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"OSL | Optical Sensing Lab\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"False signature reduction in channeled spectropolarimetry | OSL\" \/>\n\t\t<meta property=\"og:description\" content=\"Abstract. Channeled spectropolarimetry measures the complete polarization state of light, using a single spectrum, by amplitude modulating the Stokes parameters onto spectral carrier frequencies. However, spectral features that are not band limited in the Fourier transform domain, such as narrow-band atomic absorption lines, can generate false polarimetric signatures. We present a false-signature \u0001aliasing\u0002reduction technique that\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/research.ece.ncsu.edu\/osl\/2017\/03\/29\/false-signature-reduction-in-channeled-spectropolarimetry\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2017-03-29T14:26:55+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2017-03-29T14:26:55+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary\" \/>\n\t\t<meta name=\"twitter:title\" content=\"False signature reduction in channeled spectropolarimetry | OSL\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Abstract. Channeled spectropolarimetry measures the complete polarization state of light, using a single spectrum, by amplitude modulating the Stokes parameters onto spectral carrier frequencies. 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