Search Results - "Masuda, Hiroji"

Ultra-High Capacity WDM Transmission Using Spectrally-Efficient PDM 16-QAM Modulation and C- and Extended L-Band Wideband Optical Amplification by Sano, Akihide, Masuda, Hiroji, Kobayashi, Takayuki, Fujiwara, Masamichi, Horikoshi, Kengo, Yoshida, Eiji, Miyamoto, Yutaka, Matsui, Munehiro, Mizoguchi, Masato, Yamazaki, Hiroshi, Sakamaki, Yohei, Ishii, Hiroyuki

“…This paper describes ultrahigh capacity transmission based on spectrally-efficient multi-level modulation and wideband optical amplification techniques…”
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Pump Power Reduction in Optical Fiber Amplifier for WDM-Interleaved Multi-Core/Multi-Fiber System by Ono, Hirotaka, Yamada, Makoto, Masuda, Hiroji

“…The effect of reducing the pump power in a multi-core erbium-doped fiber amplifier (MC-EDFA) designed for a wavelength-division-multiplexing-interleaved…”
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409-Tb/s + 409-Tb/s crosstalk suppressed bidirectional MCF transmission over 450 km using propagation-direction interleaving by Sano, Akihide, Takara, Hidehiko, Kobayashi, Takayuki, Kawakami, Hiroto, Kishikawa, Hiroki, Nakagawa, Tadao, Miyamoto, Yutaka, Abe, Yoshiteru, Ono, Hirotaka, Shikama, Kota, Nagatani, Munehiko, Mori, Takayoshi, Sasaki, Yusuke, Ishida, Itaru, Takenaga, Katsuhiro, Matsuo, Shoichiro, Saitoh, Kunimasa, Koshiba, Masanori, Yamada, Makoto, Masuda, Hiroji, Morioka, Toshio

“…We demonstrate bidirectional transmission over 450 km of newly-developed dual-ring structured 12-core fiber with large effective area and low crosstalk…”
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No-Guard-Interval Coherent Optical OFDM for 100-Gb/s Long-Haul WDM Transmission by Sano, A., Yamada, E., Masuda, H., Yamazaki, E., Kobayashi, T., Yoshida, E., Miyamoto, Y., Kudo, R., Ishihara, K., Takatori, Y.

“…This paper describes coherent optical orthogonal frequency division multiplexing (CO-OFDM) techniques for the long-haul transmission of 100-Gb/s-class…”
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1000-km 7-core fiber transmission of 10 x 96-Gb/s PDM-16QAM using Raman amplification with 6.5 W per fiber by Takara, Hidehiko, Ono, Hirotaka, Abe, Yoshiteru, Masuda, Hiroji, Takenaga, Katsuhiro, Matsuo, Shoichiro, Kubota, Hirokazu, Shibahara, Kohki, Kobayashi, Takayuki, Miaymoto, Yutaka

“…We demonstrate 7-core fiber transmission of 10 x 96-Gb/s PDM-16QAM signals over 1000-km using distributed Raman amplification (DRA). DRA gain of 9-12 dB and…”
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120.7-Tb/s MCF-ROPA Unrepeatered Transmission of PDM-32QAM Channels Over 204 km by Takara, Hidehiko, Mizuno, Takayuki, Kawakami, Hiroto, Miyamoto, Yutaka, Masuda, Hiroji, Kitamura, Kokoro, Ono, Hirotaka, Asakawa, Shuichiro, Amma, Yoshimichi, Hirakawa, Keisuke, Matsuo, Shoichiro, Tsujikawa, Kyozo, Yamada, Makoto

“…We demonstrate the unrepeatered transmission of over 100 Tb/s by employing a multicore-fiber-based remote optically pumped amplifier. We establish 120.7-Tb/s,…”
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Over-1000-channel ultradense WDM transmission with supercontinuum multicarrier source by Ohara, T., Takara, H., Yamamoto, T., Masuda, H., Morioka, T., Abe, M., Takahashi, H.

“…In this paper, ultradense wavelength-division multiplexing (WDM) transmission technologies are discussed, and a field demonstration of over-1000-channel…”
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Neutron diffraction study of successive phase transitions in the Heisenberg antiferromagnet MnBr2 by SATO, T, KADOWAKI, H, MASUDA, H, IIO, K

“…Neutron diffraction experiments on the Heisenberg antiferromagnet MnBr2 were performed to study the successive magnetic phase transitions (TN1=2.32, K, ,…”
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Fiber-Optic Temperature Sensing with High Resolution and Stability by Detecting Amplified Spontaneous Emission by Masuda, Hiroji, Biswas, Biswajit, Tanaka, Kunihiro

“…We propose a novel fiber-optic temperature sensing technique that detects amplified spontaneous emission generated from a spool of 20.4-m erbium-doped fiber,…”
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Wide-band and gain-flattened hybrid fiber amplifier consisting of an EDFA and a multiwavelength pumped Raman amplifier by Masuda, H., Kawai, S.

“…A wide-band and finely gain-flattened hybrid fiber amplifier is realized. The seamless 3.0-, 1.3-, and 1.0-dB bandwidths of 80, 76, and 69 nm with relative…”
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S-band thulium-doped fiber amplifier employing high thulium concentration doping technique by Aozasa, S., Masuda, H., Shimizu, M.

“…This paper details an approach for shifting the gain of an S-band thulium-doped fiber amplifier (TDFA) that employs a high thulium concentration doping…”
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Novel Gain Spectrum Control Method Employing Gain Clamping and Pump Power Adjustment in Thulium-Doped Fiber Amplifier by Aozasa, S., Masuda, H., Shimizu, M., Yamada, M.

“…In this paper, we propose a novel method for controlling the gain spectrum of a thulium-doped fiber amplifier (TDFA) in the S-band. The conventional gain…”
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Influence of Intrachannel Crosstalk With Frequency Dependence on Signal Degradation in Optical Switch Network by Yamamoto, S., Yoshimatsu, T., Takara, H., Komukai, T., Hashizume, Y., Kubota, H., Masuda, H., Jinno, M., Takada, A.

“…In this paper, we show the influence of intrachannel crosstalk in an optical switch network. The intrachannel crosstalk is mainly due to a signal that is not…”
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Highly Efficient S-Band Thulium-Doped Fiber Amplifier Employing High-Thulium-Concentration Doping Technique by Aozasa, S., Masuda, H., Shimizu, M., Yamada, M.

“…In the paper, we describe in detail a highly efficient S-band thulium-doped fiber amplifier (TDFA) employing a high-thulium-concentration doping technique. A…”
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Design and spectral characteristics of gain-flattened tellurite-based fiber Raman amplifiers by Masuda, H., Mori, A., Shikano, K., Shimizu, M.

“…The design and the spectral gain and noise figure (NF) characteristics of tellurite-based fiber Raman amplifiers (FRAs), which are tellurite FRAs (T-FRAs) or…”
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The successive magnetic phase transition of hexagonal antiferromagnet CsMnI3 observed by optical birefringence by IIO, K, HOTTA, H, SANO, M, MASUDA, H, TANAKA, H, NAGATA, K

“…Birefringence measurement was made on a triangular lattice antiferromagnet CsMnI3 at temperatures around the Néel point of 11.42 K. The birefringence for light…”
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Highly Sensitive and Stable Temperature Sensing Method Using Amplified-Spontaneous-Emission Feedback Circuit by Masuda, Hiroji, Biswas, Biswajit

“…We propose a novel, highly sensitive, and stable fiber-optic temperature sensing method that utilizes the temperature dependence of the gain of an…”
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Flexible Chromatic Dispersion Compensation Over Entire L-Band for Over 40-Gb/s WDM Transparent Networks Using Multichannel Tunable Optical Dispersion Compensator by Sohma, S., Mori, K., Masuda, H., Takada, A., Seno, K., Suzuki, K., Ooba, N.

“…We describe the proof-of-concept demonstration of flexible chromatic dispersion compensation over the entire L -band region wavelength-division-multiplexing…”
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Dispersion Compensation Configuration Applying a Combination of EDC and Tunable-ODC for Extended L-Band WDM Transmission by Kotanigawa, T., Kawasaki, T., Masuda, H., Matsuda, T., Naka, A., Matsuoka, S.

“…We propose effective polarization-mode dispersion (PMD) and chromatic dispersion (CD) compensation configuration for practical use in the field, taking into…”
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Time Domain Measurement of MPI Caused by Double Rayleigh Scattering in Distributed Raman Amplifiers by Sugie, Toshihiko, Masuda, Hiroji, Aida, Kazuo

“…An MPI-based time-domain method for evaluating DRS in transmission fiber with distributed Raman amplifiers is proposed; it combines self-heterodyne detection…”
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