論文 - 菅野 敦史
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Compact 60GHz hybrid integrated photoreceiver module with 1.5-μm InAs quantum dot SOA
T. Umezawa, K. Akahane, N. Yamamoto, A. Kanno, T. Kawanishi
Progress in Electromagnetics Research Symposium 2015- 2292 - 2295 2015年
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Electromagnetics Academy
We have developed a 60-GHz hybrid integrated photoreceiver module using a quantum-dotbased optical semiconductor amplifier and a high-speed PIN photodetector for high-baud-rate opticalfiber communications. A high responsivity of 25A/W and a high sensitivity of-20.5 dBm were achieved.
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On the MIMO channel rank deficiency in W-band MIMO RoF transmissions.
S. Inudo, Yuki Yoshida, Atsushi Kanno, Pham Tien Dat, Tetsuya Kawanishi, Ken-ichi Kitayama
Optical Fiber Communications Conference and Exhibition(OFC) 1 - 3 2015年
掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
その他リンク： https://dblp.uni-trier.de/db/conf/ofc/ofc2015.html#InudoYKDKK15
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Optical frequency-interleaving full-duplex technique for fiber-optic transmission of millimeter-wave-band frequency-modulated continuous-wave downlink signal and 10-Gb/s on-off-keying uplink signal
T. Kuri, A. Kanno, T. Kawanishi
Progress in Electromagnetics Research Symposium 2015- 2276 - 2280 2015年
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Electromagnetics Academy
An optical frequency-interleaving full-duplex technique for fiber-optic transmission of millimeter-wave-band frequency-modulated continuous-wave downlink signal and 10-Gb/s on-off-keying uplink signals is newly proposed. The proposed full-duplexing technique with a flexible wavelength channel selector is experimentally demonstrated.
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Optically driven 90-GHz radar system using broadband IQ downconverter 査読あり
Atsushi Kanno, Tetsuya Kawanishi
2014 IEEE Avionics, Fiber-Optics and Photonics Technology Conference, AVFOP 2014 37 - 38 2014年12月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Institute of Electrical and Electronics Engineers Inc.
A millimeter-wave (MMW) radar system is promising for high-precision imaging because of its short wavelength and broad range of available bandwidths [1]. Particularly in the frequency range of 92-100 GHz, where the US, the EU, and Japan allow radiolocation, an atmospheric attenuation coefficient of 0.4 dB/km in standard atmospheric conditions limits the imaging range. Thus, a distributed radar system directly connected to optical fiber networks realizes both high-precision imaging and a large imaging area. A frequency-modulated continuous-wave (FM-CW) radar system based on an optical modulation technique has already been reported and evaluated in the optical domain [2]. In this paper, we evaluate the precision of a broadband FM-CW radar system operated with optical modulation technology. A broadband in-phase/quadrature (IQ) mixer can directly convert to intermediate frequency signals with a common-mode rejection feature [3].
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Performance evaluation of wavelength division multiplexed radio-over-fiber de-multiplexer for 96-GHz-band frequency-modulated continuous-wave signal delivery 査読あり
Toshiaki Kuri, Atsushi Kanno, Tetsuya Kawanishi
2014 IEEE Avionics, Fiber-Optics and Photonics Technology Conference, AVFOP 2014 23 - 24 2014年12月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Institute of Electrical and Electronics Engineers Inc.
We have experimentally evaluated the performance of a newly developed WDM RoF de-multiplexer prototype with 200-GHz-spaced 5-channel WDM RoF signal carrying each 96-GHz-band FM-CW signal and showed the usefulness. Thanks to the lightness property of fiber optics, this technology will be applicable for an on-board mm-wave-band signal delivery system in an aircraft, such as a FM-CW distributed aperture system for synthetic aperture radar.
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Z-cut LiNbO3 optical modulator using patch-antenna with orthogonal-gaps for millimeter-wave radar applications 査読あり
Y. N. Wijayanto, A. Kanno, T. Kawanishi, H. Murata, Y. Okamura
2014 International Topical Meeting on Microwave Photonics / the 9th Asia-Pacific Microwave Photonics Conference, MWP/APMP 2014 - Proceedings 192 - 195 2014年12月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Institute of Electrical and Electronics Engineers Inc.
We propose z-cut LiNbO3 optical modulators using patch-antennas with orthogonal-gaps for millimeter-wave radar applications. They are fabricated on thin LiNbO3 crystals bonded with low-k dielectric materials. Large modulation efficiency and low noise response are obtainable.
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Direct chirp measurement in vector space of electroabsorption modulator 査読あり
Ukrit Mankong, Tanawant Tangmala, Keizo Inagaki, Kanno Atsushi, Tetsuya Kawanishi
2014 International Topical Meeting on Microwave Photonics / the 9th Asia-Pacific Microwave Photonics Conference, MWP/APMP 2014 - Proceedings 127 - 130 2014年12月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Institute of Electrical and Electronics Engineers Inc.
We propose a novel method to measure chirp of an electro-absorption modulator in vector space due to intensity modulation at any frequency using optical homodyne quadrature demodulation technique. Chirp parameters are directly obtained in the small-signal vector space, enabling practical chirp assessment for advanced modulation optical transmission.
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Performance of a new burst-mode erbium-doped fiber amplifier for uplink radio-over-fiber signal transmission 査読あり
M. Shiraiwa, A. Kanno, T. Kuri, P. T. Dat, Y. Awaji, N. Wada, T. Kawanishi
2014 International Topical Meeting on Microwave Photonics / the 9th Asia-Pacific Microwave Photonics Conference, MWP/APMP 2014 - Proceedings 21 - 24 2014年12月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Institute of Electrical and Electronics Engineers Inc.
We investigated the performance of the latest burst-mode erbium-doped fiber amplifier (BM-EDFA) for uplink transmission of radio-over-fiber signals by using the long-term evolution advanced format. The new BM-EDFA was designed to have high linearity in the high output power range. Compared with conventional EDFAs, we observed lower error vector magnitudes over a wide range of optical input power.
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Z-cut LiNbO3 optical modulator using patch-antenna with orthogonal-gaps for millimeter-wave radar applications 査読あり
Y. N. Wijayanto, A. Kanno, T. Kawanishi, H. Murata, Y. Okamura
2014 International Topical Meeting on Microwave Photonics / the 9th Asia-Pacific Microwave Photonics Conference, MWP/APMP 2014 - Proceedings 192 - 195 2014年12月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Institute of Electrical and Electronics Engineers Inc.
We propose z-cut LiNbO3 optical modulators using patch-antennas with orthogonal-gaps for millimeter-wave radar applications. They are fabricated on thin LiNbO3 crystals bonded with low-k dielectric materials. Large modulation efficiency and low noise response are obtainable.
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Front-haul solutions for wireless access systems
Toshiaki Kuri, Atsushi Kanno, Tetsuya Kawanishi
Asia Communications and Photonics Conference, ACPC 2014 2014年11月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Optical Society of America (OSA)
The definition of "mobile front-haul" discussed in ITU-T is introduced. "Radio-over-X" as a generalized concept of transmission systems collaborated with radio links and "modulationsymbol-format maintaining transmission" as an efficient transmission scheme are also newly proposed.
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Digital signal processing techniques for multi-core fiber transmission using self-homodyne detection schemes
José Manuel Delgado Mendinueta, Ruben S. Luís, Benjamin J. Puttnam, Jun Sakaguchi, Werner Klaus, Yoshinari Awaji, Naoya Wada, Atsushi Kanno, Tetsuya Kawanishi
European Signal Processing Conference 1880 - 1884 2014年11月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：European Signal Processing Conference, EUSIPCO
We discuss digital signal processing (DSP) techniques for self-homodyne detection (SHD), multi-core fiber (MCF) transmission links, and related technologies. We focus on exploiting the reduced phase noise of self-homodyne multi-core fiber (SH-MCF) systems to enable DSP resource savings and describe digital receiver architectures that mixes signal and local oscillator in the digital domain.
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Highly Sensitive Photodetector Using Ultra-High-Density 1.5-μm Quantum Dots for Advanced Optical Fiber Communications 査読あり
Toshimasa Umezawa, Kouichi Akahane, Naokatsu Yamamoto, Atsushi Kanno, Tetsuya Kawanishi
IEEE Journal of Selected Topics in Quantum Electronics 20 ( 6 ) 2014年11月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Institute of Electrical and Electronics Engineers Inc.
We have fabricated a high-density 1.5-μm quantum dot photodetector for advanced optical fiber communications and have found unique optical properties, including avalanche multiplication. The structure of the absorption layer had stacked InAs/InGaAlAs layers with a high density of 1 × 1012 cm-2, which consisted of strained 1.5-μm InAs quantum dots and a strain compensation layer of InGaAlAs. A three times larger absorption coefficient than the InGaAs layer, an avalanche multiplication effect, and a low dark current are reported with InAs quantum dot conditions.
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Highly Sensitive Photodetector Using Ultra-High-Density 1.5-mu m Quantum Dots for Advanced Optical Fiber Communications 査読あり
Toshimasa Umezawa, Kouichi Akahane, Naokatsu Yamamoto, Atsushi Kanno, Tetsuya Kawanishi
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS 20 ( 6 ) 2014年11月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
We have fabricated a high-density 1.5-mu m quantum dot photodetector for advanced optical fiber communications and have found unique optical properties, including avalanche multiplication. The structure of the absorption layer had stacked InAs/InGaAlAs layers with a high density of 1 x 10(12) cm(-2), which consisted of strained 1.5-mu m InAs quantum dots and a strain compensation layer of InGaAlAs. A three times larger absorption coefficient than the InGaAs layer, an avalanche multiplication effect, and a low dark current are reported with InAs quantum dot conditions.
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Broadband Frequency-Modulated Continuous-Wave Signal Generation by Optical Modulation Technique 査読あり
Atsushi Kanno, Tetsuya Kawanishi
JOURNAL OF LIGHTWAVE TECHNOLOGY 32 ( 20 ) 3566 - 3572 2014年10月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Optical frequency-modulated continuous-wave (FM-CW) signal generation with a bandwidth of 35 GHz and a pulse duration of 1 mu s in the range of 75-110 GHz is demonstrated with an optical frequency multiplier consisting of an optical modulator and optical filters. The FM-CW signal generator is used as a signal source for the surveillance of obstacles and debris in a large area by a distributed radar system connected to the optical fiber network. The system for millimeter-wave FM-CW signal generation is realized using the functions of a multi-frequency band and segmentation of the radar heads with several channels to avoid radio-frequency interference. The wavelength-division multiplexing technology with simple optical heterodyning aids in realizing these functions with high availability.
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High-Capacity Wireless Backhaul Network Using Seamless Convergence of Radio-over-Fiber and 90-GHz Millimeter-Wave 査読あり
Pham Tien Dat, Atsushi Kanno, Keizo Inagaki, Tetsuya Kawanishi
JOURNAL OF LIGHTWAVE TECHNOLOGY 32 ( 20 ) 3910 - 3923 2014年10月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
We propose and experimentally demonstrate a seamlessly converged radio-over-fiber (RoF) and millimeter-wave system at 90 GHz for high-speed wireless signal transmission. We successfully transmit and demodulate standard orthogonal frequency-division multiplexing-based wireless local access network (WLAN) signals, long term evolution eNB conformance test models, and long term evolution advanced signals over the system. Satisfactory transmission performance over the converged RoF and a 5-m 90-GHz wireless link is achieved. The measured root-mean-square error vector magnitude is well under the requirement defined by the standards. We also investigate the dependence of the transmission performance on the fiber length due to the effect of fiber dispersion and estimate the achievable wireless transmission distance. The estimated transmission range of both the fiber length and wireless link are sufficiently long for practical applications, such as mobile backhaul/fronthaul, wireless access network for WLAN signals. Possible solutions and the estimated transmission range are also discussed to use millimeter-wave and RoF system convergence for uplink transmission. The obtained results confirm the potential to use the system in future high-speed, small-cell mobile networks and in broadband wireless access networks.
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High-capacity self-homodyne PDM-WDM-SDM transmission in a 19-core fiber 査読あり
Benjamin J. Puttnam, Ruben Luis, Jose-Manuel Delgado-Mendinueta, Jun Sakaguchi, Werner Klaus, Yoshinari Awaji, Naoya Wada, Atsushi Kanno, Tetsuya Kawanishi
OPTICS EXPRESS 22 ( 18 ) 21185 - 21191 2014年09月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：OPTICAL SOC AMER
We investigate a high-capacity, space-division-multiplexed (SDM) transmission system using self-homodyne detection (SHD) in multicore fiber (MCF). We first investigate SHD phase noise cancellation with both kHz and MHz range linewidths for both quadrature-phase shift-keyed (QPSK) and 16 quadrature-amplitude modulation (16QAM) signals, finding that phase noise cancellation in SHD enabled transmission with MHz linewidth lasers that resulted in error floors when using intradyne detection. We then demonstrate a high throughput SHD transmission system using low-cost, MHz linewidth distributed feedback lasers. We transmit a CW pilot-tone on a single core of a 10.1 km MCF span with the remaining 18 cores used to transmit 125 wavelength-division multiplexed (WDM) QPSK and polarization-division-multiplexed (PDM)-QPSK signals with 50 GHz channel spacing at 25 GBd. For PDM transmission and assuming a 7% forward-error correction overhead this is equivalent 210 Tb/s transmission with a SE of 33.4 b/s/Hz. High-capacity transmission is achieved despite high inter-core crosstalk, broad transmitter linewidth and narrow channel spacing, showing that combining SHD with MCF enables high throughput, low-cost transmission in next-generation optical networks. (C) 2014 Optical Society of America
DOI： 10.1364/OE.22.021185
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Development of ultra-broadband UTC-PD module beyond 110 GHz without bias circuit
T. Umezawa, K. Akahane, N. Yamamoto, A. Kanno, T. Kawanishi
Optics InfoBase Conference Papers 2014年07月
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High extinction ratio characteristics of over 60 dB Mach-Zehnder modulator with asymmetric power-splitting Y-branches on X-cut Ti:LiNbO3 査読あり
Yuya Yamaguchi, Shinya Nakajima, Atsushi Kanno, Tetsuya Kawanishi, Masayuki Izutsu, Hirochika Nakajima
JAPANESE JOURNAL OF APPLIED PHYSICS 53 ( 8 ) 2014年07月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：IOP PUBLISHING LTD
We discuss the performance of Mach-Zehnder modulators with asymmetric power-splitting Y-branches theoretically and confirmed it experimentally. The output characteristics of the modulator depend on the relationship between the power splitting ratios of the front and the back Y-branches. Even if the modulator consists of two asymmetric Y-branches, we can achieve high-extinction-ratio operation, with an additional loss as compared with the ideal case, by tuning the splitting ratio of only one of the two Y-branches. The additional loss, however, is small in many cases because the asymmetry considered here is caused by fabrication errors. (C) 2014 The Japan Society of Applied Physics
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Self-homodyne detection in optical communication systems 査読あり
Benjamin J. Puttnam, Ruben S. Luís, José Manuel Delgado Mendinueta, Jun Sakaguchi, Werner Klaus, Yukiyoshi Kamio, Moriya Nakamura, Naoya Wada, Yoshinari Awaji, Atsushi Kanno, Tetsuya Kawanishi, Tetsuya Miyazaki
Photonics 1 ( 2 ) 110 - 130 2014年06月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：MDPI AG
We review work on self-homodyne detection (SHD) for optical communication systems. SHD uses a transmitted pilot-tone (PT), originating from the transmitter laser, to exploit phase noise cancellation at a coherent receiver and to enable transmitter linewidth tolerance and potential energy savings. We give an overview of SHD performance, outlining the key contributors to the optical signal-to-noise ratio penalty compared to equivalent intradyne systems, and summarize the advantages, differences and similarities between schemes using polarization-division multiplexed PTs (PDM-SHD) and those using space-division multiplexed PTs (SDM-SHD). For PDM-SHD, we review the extensive work on the transmission of advanced modulation formats and techniques to minimize the trade-offwith spectral efficiency, as well as recent work on digital SHD, where the SHD receiver is combined with an polarization-diversity ID front-end receiver to provide both polarization and modulation format alignment. We then focus on SDM-SHD systems, describing experimental results using multi-core fibers (MCFs) with up to 19 cores, including high capacity transmission with broad-linewidth lasers and experiments incorporating SDM-SHD in networking. Additionally, we discuss the requirement for polarization tracking of the PTs at the receiver and path length alignment and review some variants of SHD before outlining the future challenges of self-homodyne optical transmission and gaps in current knowledge.
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Self-homodyne detection in optical communication systems 査読あり
Benjamin J. Puttnam, Ruben S. Luís, José Manuel Delgado Mendinueta, Jun Sakaguchi, Werner Klaus, Yukiyoshi Kamio, Moriya Nakamura, Naoya Wada, Yoshinari Awaji, Atsushi Kanno, Tetsuya Kawanishi, Tetsuya Miyazaki
Photonics 1 ( 2 ) 110 - 130 2014年06月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：MDPI AG
We review work on self-homodyne detection (SHD) for optical communication systems. SHD uses a transmitted pilot-tone (PT), originating from the transmitter laser, to exploit phase noise cancellation at a coherent receiver and to enable transmitter linewidth tolerance and potential energy savings. We give an overview of SHD performance, outlining the key contributors to the optical signal-to-noise ratio penalty compared to equivalent intradyne systems, and summarize the advantages, differences and similarities between schemes using polarization-division multiplexed PTs (PDM-SHD) and those using space-division multiplexed PTs (SDM-SHD). For PDM-SHD, we review the extensive work on the transmission of advanced modulation formats and techniques to minimize the trade-offwith spectral efficiency, as well as recent work on digital SHD, where the SHD receiver is combined with an polarization-diversity ID front-end receiver to provide both polarization and modulation format alignment. We then focus on SDM-SHD systems, describing experimental results using multi-core fibers (MCFs) with up to 19 cores, including high capacity transmission with broad-linewidth lasers and experiments incorporating SDM-SHD in networking. Additionally, we discuss the requirement for polarization tracking of the PTs at the receiver and path length alignment and review some variants of SHD before outlining the future challenges of self-homodyne optical transmission and gaps in current knowledge.
