K
Kazuhiko Oka
Researcher at Hirosaki University
Publications - 109
Citations - 2051
Kazuhiko Oka is an academic researcher from Hirosaki University. The author has contributed to research in topics: Polarization (waves) & Polarimeter. The author has an hindex of 21, co-authored 107 publications receiving 1814 citations. Previous affiliations of Kazuhiko Oka include Tokyo University of Agriculture and Technology & Hokkaido University.
Papers
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Journal ArticleDOI
Spectroscopic polarimetry with a channeled spectrum.
Kazuhiko Oka,Takayuki Kato +1 more
TL;DR: A pair of thick birefringent retarders is incorporated into the spectroscopic polarimeter, so the generated channeled spectrum is composed of three quasi-cosinusoidal components carrying the information about the SOP of the light that is being measured.
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Optical pulse compression to 3.4 fs in the monocycle region by feedback phase compensation.
TL;DR: A feedback system combined with only one 4-f phase compensator with a spatial light modulator and a significantly improved phase characterizer based on modified spectral phase interferometry for direct electric-field reconstruction produces the shortest pulse in the visible-to-infrared region.
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White-light channeled imaging polarimeter using broadband polarization gratings
TL;DR: A white-light snapshot channeled linear imaging (CLI) polarimeter is demonstrated by utilizing polarization gratings (PGs) to enable polarimetric image data to be acquired at shorter exposure times in daylight conditions, making it more appealing over the quasi-monochromatic channeled imaging polarimeters previously described in the literature.
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High birefringence of the yttrium vanadate crystal in the middle wavelength infrared
TL;DR: A high birefringence of over 0.21 for the yttrium vanadate (YVO4) crystal in the middle wavelength infrared (i.e., 3-5 microm) was measured.
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Snapshot imaging Mueller matrix polarimeter using polarization gratings
TL;DR: A snapshot imaging Mueller matrix polarimeter (SIMMP) is theoretically described and empirically demonstrated through simulation to demonstrate the system's performance in the presence of noise.