Zobrazeno 1 - 10
of 261
pro vyhledávání: '"Yoshiki Ichioka"'
Autor:
Tsuyoshi Konishi, Yoshiki Ichioka
Publikováno v:
Optical Information Processing: A Tribute to Adolf Lohmann
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9d4f3b8374da90e32488ff2b0072667f
https://doi.org/10.1117/3.2265058.ch14
https://doi.org/10.1117/3.2265058.ch14
Autor:
Tsuyoshi Konishi, Hideaki Furukawa, Yoshiki Ichioka, Wanji Yu, Kazuyoshi Itoh, Yoshinori Oshita
Publikováno v:
Japanese Journal of Applied Physics. 43:7065-7071
We demonstrate that crosstalk caused by matched filtering can be suppressed by designing a header recognition filter in the header recognition unit based on optical correlation processing. The header recognition filter is designed using a technique o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::25f39caa681df549d1bf5eedb890656b
https://doi.org/10.1143/jjap.43.7065
https://doi.org/10.1143/jjap.43.7065
Autor:
Yoshiki Ichioka, Kazuyoshi Itoh, Hideaki Furukawa, Wanji Yu, Tsuyoshi Konishi, Yoshinori Oshita
Publikováno v:
Optical Review. 11:119-125
Optical header recognition is one key function that enables ultrafast optical routing in photonic packet-switched networks. Especially, optical header recognition based on optical correlation processing has attracted much attention. Header signals us
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d72ea8cfd034c92ac8d68e5ed71fb971
https://doi.org/10.1007/s10043-004-0119-y
https://doi.org/10.1007/s10043-004-0119-y
Autor:
Wanji Yu, Kazuyoshi Itoh, Yoshiki Ichioka, Yoshinori Oshita, Tsuyoshi Konishi, Kazunori Tanimura
Publikováno v:
Japanese Journal of Applied Physics. 42:7318-7325
We propose a new method using analysis before acquisition (here, we call it the preprocessing method) to inhibit the influence of the properties of the detector in pulse measurement. We introduce concepts of optical signal processing into the pulse m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::15fbeb6c96774a6f4b76eb9627ef3191
https://doi.org/10.1143/jjap.42.7318
https://doi.org/10.1143/jjap.42.7318
Publikováno v:
Journal of Optics A: Pure and Applied Optics. 5:S365-S369
We propose an encryption process in ultra-fast image transmission using an OTDM/WDM scheme. We use a spatial time–frequency transform filter for time-to-2D-space conversion as a secret key. The simulation of this encryption process and preliminary
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::244006f699a1dd86a64c3c97b0b13480
https://doi.org/10.1088/1464-4258/5/5/393
https://doi.org/10.1088/1464-4258/5/5/393
Autor:
Tsutom Yotsuya, Yoshiki Ichioka, Tsuyoshi Konishi, Hiroshi Toyota, Yoshinori Oshita, Wanji Yu
Publikováno v:
Japanese Journal of Applied Physics. 42:3434-3437
The deep gratings with ultrahigh spatial frequencies have been developed for wavelength dispersion applications. The diffraction performances, including diffraction efficiencies, wavelength dispersive abilities and wavelength band, have been theoreti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d3b02b8edda87b2ef8ef1dd2fd8f3976
https://doi.org/10.1143/jjap.42.3434
https://doi.org/10.1143/jjap.42.3434
Publikováno v:
Optical Review. 10:140-145
We propose a new technique for an interconversion between a three dimensional (3-D) spatial signal and a temporal signal. It is realized by combination of a holographic technique, a 2-D spatial filtering technique and a time-space conversion techniqu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::13169077ff18c3f77a974678eb83b324
https://doi.org/10.1007/s10043-003-0140-6
https://doi.org/10.1007/s10043-003-0140-6
Publikováno v:
Optical Review. 10:77-81
We demonstrate the retrieval of the amplitude and phase of an ultrashort optical pulse from an optical spectrogram obtained by optical spectrogram scope (OSS). OSS is an interferometric method of obtaining a single-shot optical spectrogram without no
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e49eeb5449cbc4ecdbaa01f1650f2046
https://doi.org/10.1007/s10043-003-0077-9
https://doi.org/10.1007/s10043-003-0077-9
Publikováno v:
Optical Review. 9:141-145
We propose an ultrafast optical time-to-two-dimensional (2-D) space conversion system using a crystal of β-BaB2O4. The proposed system can optically retrieve a 2-D spatial distribution (an image signal) from an ultra-short laser pulse modulated by a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::468acf568d7b4ad0a527706deee5c580
https://doi.org/10.1007/s10043-002-0141-x
https://doi.org/10.1007/s10043-002-0141-x
Publikováno v:
Optik. 113:303-308
Summary We have experimentally studied about spatial light modulation by using the early photochemical product of bacteriorhodopsin(bR) called K intermediate at room temperature. In general, it is necessary for using K intermediate to lower the tempe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8aeb3e7d27a8aeee0abac505fe10d5d9
https://doi.org/10.1078/0030-4026-00167
https://doi.org/10.1078/0030-4026-00167