Search Results - "Hirooka, T."

Circulation changes in the stratosphere and mesosphere during the stratospheric sudden warming event in January 2009 by Iida, C., Hirooka, T., Eguchi, N.

“…In this study, general circulation changes are investigated during the stratospheric sudden warming event in January 2009 by the use of Aura Earth Observing…”
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Thermosensitive gels incorporating cyclic monoazatetrathioether units for the selective extraction of class b metal ions by Chayama, K., Hirooka, T., Iwatsuki, S.

“…A cyclic monoaza–tetrathia-crown ether, 1-aza-4,7,11,14-tetrathiacyclohexadecane (ATCH) unit have been introduced into the temperature responsive polymer,…”
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Ionospheric current system during sudden stratospheric warming events by Yamazaki, Y., Yumoto, K., McNamara, D., Hirooka, T., Uozumi, T., Kitamura, K., Abe, S., Ikeda, A.

“…This paper describes ionospheric current systems associated with the counter‐electrojet during sudden stratospheric warming (SSW) events in the northern winter…”
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Extraordinary Features of the Planetary Wave Propagation During the Boreal Winter 2013/2014 and the Zonal Wave Number Two Predominance by Harada, Y., Hirooka, T.

“…Observational features of the winter 2013/2014 are investigated using of the Japanese 55‐year Reanalysis data. This winter can be characterized by the…”
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Optical adaptive equalization of high-speed signals using time-domain optical Fourier transformation by Hirooka, T., Nakazawa, M.

“…This paper describes a new distortion-free optical transmission method that can eliminate any kind of linear perturbation including jitter, polarization-mode…”
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Ideal distortion-free transmission using optical Fourier transformation and Fourier transform-limited optical pulses by Nakazawa, M., Hirooka, T., Futami, F., Watanabe, S.

“…A new scheme for undistorted ideal pulse transmission is proposed that uses optical Fourier transformation (OFT) and transform-limited (TL) pulses. The…”
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All-Optical 40-GHz Time-Domain Fourier Transformation Using XPM With a Dark Parabolic Pulse by Hirooka, T., Nakazawa, M.

“…We demonstrate a 40-GHz all-optical time-domain Fourier transformation, in which an ideal parabolic phase modulation is applied to a signal by cross-phase…”
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All-Optical Demultiplexing of 640-Gb/s OTDM-DPSK Signal Using a Semiconductor SMZ Switch by Hirooka, T., Okazaki, M., Hirano, T., Guan, P., Nakazawa, M., Nakamura, S.

“…The all-optical demultiplexing of a 640-Gb/s single- polarization optical time-division-multiplexing signal is successfully demonstrated by using a symmetric…”
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PMD-Induced Crosstalk in Ultrahigh-Speed Polarization-Multiplexed Optical Transmission in the Presence of PDL by Hirooka, T., Hirano, T., Tomiyama, Y., Pengyu Guan, Nakazawa, M.

“…We present a new type of crosstalk in a polarization-multiplexed ultrahigh-speed transmission caused by polarization-mode dispersion (PMD) in the presence of…”
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QAM quantum noise stream cipher using digital coherent optical transmission by Yoshida, M., Hirooka, T., Kasai, K., Nakazawa, M.

“…We present a high-security digital-coherent transmission scheme with a QAM-based two-dimensional quantum-noise stream cipher employing amplitude and phase…”
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Quasi-biennial variation of the 5-day wave in the stratosphere by Miyoshi, Y., Hirooka, T.

“…Interannual variability of the 5‐day wave in the stratosphere is examined by the use of National Center for Environmental Prediction reanalysis data…”
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A Straight-Line 160-Gb/s DPSK Transmission Over 1000 km With Time-Domain Optical Fourier Transformation by Hirooka, T., Okazaki, M., Nakazawa, M.

“…A straight-line 160-Gb/s 1000-km differential phase-shift keying transmission was successfully demonstrated with time-domain optical Fourier transformation…”
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320-Gb/s Single-Polarization DPSK Transmission Over 525 km Using Time-Domain Optical Fourier Transformation by Hirooka, T., Okazaki, M., Guan, P., Nakazawa, M.

“…A 320-Gb/s single-polarization differential phase-shift keying transmission is successfully demonstrated over a 525-km straight transmission line using…”
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Low-Penalty 5 \,\times \,320 Gb/s/Single-Channel WDM DPSK Transmission Over 525 km Using Time-Domain Optical Fourier Transformation by Pengyu Guan, Okazaki, M., Hirano, T., Hirooka, T., Nakazawa, M.

“…Ultrahigh-speed wavelength-division-multiplexing transmission at 5times320 Gb/s/single channel is successfully demonstrated over 525 km using time-domain…”
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Resonant intrachannel pulse interactions in dispersion-managed transmission systems by Ablowitz, M.J., Hirooka, T.

“…Nonlinear intrachannel interactions in a transmission system with strong periodic dispersion management are investigated. An analytical model that describes…”
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160-Gb/s 200-km Field Transmission Experiment With Large PMD Using a Time-Domain Optical Fourier Transformation Technique by Okazaki, M., Pengyu Guan, Hirooka, T., Nakazawa, M., Miyazaki, T.

“…A 160-Gb/s single-polarization differential phase-shift-keying transmission using time-domain optical Fourier transformation (OFT) was demonstrated over a…”
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Gaussian and sech approximations of mode field profiles in photonic crystal fibers by Hirooka, T., Hori, Y., Nakazawa, M.

“…We propose using the least square method for approximating the electrical field distribution of the fundamental mode in photonic crystal fibers (PCFs) by using…”
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Stimulated Brillouin Scattering in Ultrahigh-Speed In-Phase RZ and CS-RZ OTDM Transmission by Hirooka, T., Osawa, K., Okazaki, M., Nakazawa, M., Murai, H.

“…We report that stimulated Brillouin scattering (SBS) plays an important role in ultrahigh-speed bitwise phase-controlled optical time-division multiplexing…”
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160-Gb/s-600-km OTDM Transmission Using Time-Domain Optical Fourier Transformation by Hirooka, T., Hagiuda, K., Kumakura, T., Osawa, K., Nakazawa, M.

“…We report error-free 160-Gb/s optical time-division-multiplexed transmission over 600 km with the on-off keying and single-polarization format. We employed the…”
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Feasibility of densely dispersion managed soliton transmission at 160 Gb/s by Hirooka, T., Nakada, T., Hasegawa, A.

“…We numerically demonstrate 160 Gb/s densely dispersion-managed soliton transmission in a single channel over 2000 km in the dispersion-flattened fibers in the…”
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