Search Results - "Asobe, M"

First demonstration of high-order QAM signal amplification in PPLN-based phase sensitive amplifier by Umeki, T, Tadanaga, O, Asobe, M, Miyamoto, Y, Takenouchi, H

“…We demonstrate the phase sensitive amplification of a high-order quadrature amplitude modulation (QAM) signal using non-degenerate parametric amplification in…”
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Multi-span transmission using phase and amplitude regeneration in PPLN-based PSA by Umeki, T, Asobe, M, Takara, H, Miyamoto, Y, Takenouchi, H

“…We demonstrated multi-span transmission using a periodically poled LiNbO(3) (PPLN) based phase sensitive amplifier (PSA). An in-line PSA with a carrier…”
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Long-distance distribution of time-bin entangled photon pairs over 100 km using frequency up-conversion detectors by Honjo, T, Takesue, H, Kamada, H, Nishida, Y, Tadanaga, O, Asobe, M, Inoue, K

“…We report an experimental demonstration of the distribution of time-bin entangled photon pairs over 100 km of optical fiber. In our experiment, 1.5-mum…”
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Megabits secure key rate quantum key distribution by Zhang, Q, Takesue, H, Honjo, T, Wen, K, Hirohata, T, Suyama, M, Takiguchi, Y, Kamada, H, Tokura, Y, Tadanaga, O, Nishida, Y, Asobe, M, Yamamoto, Y

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Long-distance entanglement-based quantum key distribution over optical fiber by Honjo, T, Nam, S W, Takesue, H, Zhang, Q, Kamada, H, Nishida, Y, Tadanaga, O, Asobe, M, Baek, B, Hadfield, R, Miki, S, Fujiwara, M, Sasaki, M, Wang, Z, Inoue, K, Yamamoto, Y

“…We report the first entanglement-based quantum key distribution (QKD) experiment over a 100-km optical fiber. We used superconducting single photon detectors…”
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Efficient entanglement distribution over 200 kilometers by Dynes, J F, Takesue, H, Yuan, Z L, Sharpe, A W, Harada, K, Honjo, T, Kamada, H, Tadanaga, O, Nishida, Y, Asobe, M, Shields, A J

“…Here we report the first demonstration of entanglement distribution over a record distance of 200 km which is of sufficient fidelity to realize secure…”
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Multi-span transmission using phase and amplitude regeneration in PPLN-based PSA by Umeki, T., Asobe, M., Takara, H., Miyamoto, Y., Takenouchi, H.

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0-dB wavelength conversion using direct-bonded QPM-Zn : LiNbO3 ridge waveguide by Nishida, Y., Miyazawa, H., Asobe, M., Tadanaga, O., Suzuki, H.

“…We fabricate a 50-mm-long ZnO-doped quasi-phase matched LiNbO 3 ridge waveguide by employing the direct bonding method. A second-harmonic generation conversion…”
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Highly Efficient +5-dB Parametric Gain Conversion Using Direct-Bonded PPZnLN Ridge Waveguide by Umeki, T., Asobe, M., Nishida, Y., Tadanaga, O., Magari, K., Yanagawa, T., Suzuki, H.

“…We fabricated a 50-mm-long ZnO-doped quasi-phase-matched LiNbO ridge waveguide by employing the direct bonding and dry etching techniques. We obtained a…”
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Efficient entanglement distribution over 200 kilometers by Dynes, J. F., Takesue, H., Yuan, Z. L., Sharpe, A. W., Harada, K., Honjo, T., Kamada, H., Tadanaga, O., Nishida, Y., Asobe, M., Shields, A. J.

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Field trial of differential-phase-shift quantum key distribution using polarization independent frequency up-conversion detectors by Honjo, T, Yamamoto, S, Yamamoto, T, Kamada, H, Nishida, Y, Tadanaga, O, Asobe, M, Inoue, K

“…We report a field trial of differential phase shift quantum key distribution (QKD) using polarization independent frequency up-conversion detectors. A…”
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High-Quality Grouped-Wavelength Conversion and Dynamic Switching Using Multiple-QPM LiNbO and TLA by Song, H.B., Tadanaga, O., Umeki, T., Tomita, I., Ishii, H., Oohashi, H., Asobe, M.

“…We demonstrate dynamic grouped-wavelength conversion using multiple quasi-phase-matched LiNbO 3 modules and a tunable laser diode array. A high signal-to-noise…”
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Applications of highly nonlinear chalcogenide glass fibers in ultrafast all-optical switches by Asobe, M., Kanamori, T., Kubodera, K.

“…Applications of chalcogenide glass fibers in ultrafast all-optical switches have been investigated. Ultrafast all-optical switching has been accomplished in an…”
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All-optical switching based on cascading of second-order nonlinearities in a periodically poled titanium-diffused lithium niobate waveguide by Kanbara, H., Itoh, H., Asobe, M., Noguchi, K., Miyazawa, H., Yanagawa, T., Yokohama, I.

“…We report efficient all-optical switching by using a periodically poled titanium-diffused lithium niobate (Ti:PPLN) waveguide. The periodically domain…”
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Multiple quasi-phase-matched device using continuous phase modulation of /spl chi//sup (2)/ grating and its application to variable wavelength conversion by Asobe, M., Tadanaga, O., Miyazawa, H., Nishida, Y., Suzuki, H.

“…We propose a new multiple quasi-phase-matched wavelength converter based on the continuous phase modulation of a /spl chi//sup (2)/ grating for use in variable…”
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0-dB wavelength conversion using direct-bonded QPM-Zn : LiNbO/sub 3/ ridge waveguide by Nishida, Y., Miyazawa, H., Asobe, M., Tadanaga, O., Suzuki, H.

“…We fabricate a 50-mm-long ZnO-doped quasi-phase matched LiNbO/sub 3/ ridge waveguide by employing the direct bonding method. A second-harmonic generation…”
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Ultrafast all-optical switching using highly nonlinear chalcogenide glass fiber by Asobe, M., Kanamori, T., Kubodera, K.

“…Ultrafast all-optical switching with a switching power of 14 W was demonstrated in a Kerr shutter configuration using a single-mode As/sub 2/S/sub 3/-based…”
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All-optical discrimination based on nonlinear transmittance of MQW semiconductor optical gates by Hirano, A., Tsuda, H., Kobayashi, H., Takahashi, R., Asobe, M., Sato, K., Hagimoto, K.

“…This paper proposes an all-optical regenerator utilizing a novel all-optical discriminator. The impacts of nonlinearity of optical gates on discrimination…”
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First demonstration of high-order QAM signal amplification in PPLN-based phase sensitive amplifier by Umeki, T, Tadanaga, O, Asobe, M, Miyamoto, Y, Takenouchi, H

“…We achieved 16QAM signal amplification using a PPLN-based PSA with high gain linearity. Phase noise cancellation and an improved SNR were successfully…”
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Nonlinear Optical Properties of Chalcogenide Glass Fibers and Their Application to All-Optical Switching by Asobe, Masaki

“…Chalcogenide glass fiber is one of the most promising candidates for use as a nonlinear optical medium because of its high optical nonlinearity and long…”
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