Modified window function for optically thick samples measured by a terahertz time-domain spectroscopic system using a multimode laser diode

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dc.authorscopusid57004521100en_US
dc.contributor.authorMorikawa, Osamu
dc.contributor.authorHamada, Dai
dc.contributor.authorOzturk, Turgut
dc.contributor.authorYamamoto, Kohji
dc.contributor.authorKurihara, Kazuyoshi
dc.contributor.authorKuwashima, Fumiyoshi
dc.contributor.authorTani, Masahiko
dc.date.accessioned2022-04-21T06:04:32Z
dc.date.available2022-04-21T06:04:32Z
dc.date.issued2021en_US
dc.departmentBTÜ, Mühendislik ve Doğa Bilimleri Fakültesi, Elektrik-Elektronik Mühendisliği Bölümüen_US
dc.description.abstractA low-cost type terahertz time-domain spectroscopic system can be constituted using a multimode laser diode instead of a pulse laser. To suppress noise, a window function is usually used in the Fourier transformation. When this system is used to measure an optically thick sample, the obtained refractive index shows sinusoidal structures. This is caused by ingress of a signal fragment into the measured range and egress of another signal fragment out of the measured range. In addition, a broad positive background component appears in the imaginary part of the refractive index. This is because of the decreased amplitude of the central structure of the signal, which results from the time shift under the window function caused by sample insertion. These false structures can be eliminated by using a modified window function that is shifted with the signal when the sample is inserted.en_US
dc.identifier.doi10.1364/JOSAB.414916en_US
dc.identifier.endpage1391en_US
dc.identifier.issn07403224
dc.identifier.issue4en_US
dc.identifier.scopusqualityN/Aen_US
dc.identifier.startpage1386en_US
dc.identifier.urihttps://hdl.handle.net/20.500.12885/1939
dc.identifier.volume38en_US
dc.identifier.wosqualityN/Aen_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorÖztürk, Turgut
dc.language.isoenen_US
dc.publisherThe Optical Societyen_US
dc.relation.ispartofJournal of the Optical Society of America B: Optical Physicsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectFourier transformsen_US
dc.subjectBackground componentsen_US
dc.subjectWindow functionsen_US
dc.subjectMultimode laseren_US
dc.subjectFourier transformationsen_US
dc.titleModified window function for optically thick samples measured by a terahertz time-domain spectroscopic system using a multimode laser diodeen_US
dc.typeArticleen_US

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