論文 - 菅野 敦史
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Single mach-zehnder modulator with active Y-branch for higher than 60 dB extinction-ratio operation 査読あり
Yuya Yamaguchi, Shinya Nakajima, Atsushi Kanno, Tetsuya Kawanishi, Masayuki Izutsu, Hirochika Nakajima
IET Conference Publications 2013 ( 622 ) 930 - 932 2013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）
We investigated a lithium niobate (LiNbO3) single Mach-Zehnder modulator (MZM) with an active Y-branch, which is similar to an optical Y-branch switch. Using the modulator, we demonstrated high extinction-ratio operation (>
60 dB) and confirmed the function and the useful of the active Y-branch MZM.DOI： 10.1049/cp.2013.1583
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RF Response of PIN Photodiode with Avalanche Multiplication Using Quantum Dots 査読あり
T. Umezawa, K. Akahane, A. Kanno, T. Kawanishi
2013 CONFERENCE ON LASERS AND ELECTRO-OPTICS PACIFIC RIM (CLEO-PR) 2013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：IEEE
We fabricate a new PIN photodiode using InAs/InAlGaAs quantum dot absorption layer with an avalanche multiplication, low breakdown temperature coefficient, and high frequency response. Multiplication factors of M = 1 to M = 12 and the RF response over 10GHz are reported.
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Radio-over-fiber photonic wireless bridge in the W-Band 査読あり
Sebastian Babiel, Andreas Stohr, Atsushi Kanno, Tetsuya Kawanishi
2013 IEEE International Conference on Communications Workshops, ICC 2013 838 - 842 2013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）
In this paper, we present a photonic wireless system operating in the W-Band (75-110 GHz) featuring ultra-high bandwidth as well as simple NRZ-OOK modulation format. By using a cascaded optical RF and data modulation approach on the transmitter side, flexible adjustment of the wireless RF carrier in the W-Band is achieved, while direct electrical to optical conversion with advanced photonic components on the receiver side enables true photonic wireless bridging. In first experiments, data rates up to 10 Gb/s have been experimentally demonstrated. © 2013 IEEE.
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Quadrature-phase-shift-keying radio-over-fiber transmission for coherent optical and radio seamless networks 査読あり
Atsushi Kanno, Pham Tien Dat, Toshiaki Kuri, Iwao Hosako, Tetsuya Kawanishi, Yoshihiro Yasumura, Yuki Yoshida, Ken-Ichi Kitayama
IEICE Transactions on Electronics E96-C ( 2 ) 156 - 162 2013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：Institute of Electronics, Information and Communication, Engineers, IEICE
We propose a coherent optical and radio seamless network concept that allows broadband access without deployment of additional optical fibers within an optical fiber dead zone while enhancing network resilience to disasters. Recently developed radio-over-fiber (RoF) and digital coherent detection technologies can seamlessly convert between optical and radio signals. A millimeter-wave radio with a capacity greater than 10 Gb/s and high-speed digital signal processing is feasible for this purpose. We provide a preliminary demonstration of a high-speed, W-band (75-110 GHz) radio that is seamlessly connected to an optical RoF transmitter using a highly accurate optical modulation technique to stabilize the center frequencies of radio signals. Using a W-band digital receiver with a sensitivity of -37 dBm, we successfully transmitted an 18.6Gb/s quadrature-phase-shift-keying signal through both air and an optical fiber. Copyright © 2013 The Institute of Electronics, Information and Communication Engineers.
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Power consumption of communication systems employing radio-over-fiber distributed antenna systems for railway 査読あり
Tien Dat Pham, Atsushi Kanno, Tetsuya Kawanishi
Proceedings of SPIE - The International Society for Optical Engineering 8645 2013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）
Demand on high speed communication and broadband access connection for fast moving passengers is rapidly increasing. However, the current wireless access communication techniques for railway which are mainly based on GSM for rail, satellite, and macro-cell cellular networks cannot meet the requirement of communication on fast moving trains. Cellular networks with small cell size and high carrier frequencies can be realized as a promising solution to overcome the current obstacles. In that situation, a radio-over-fiber distributed antenna system using WDM technology can be an attractive means to connect small base stations along the railway track to the control centers. However, considering a huge number of base stations placed along the railway track, power consumption will become one of the main concerns. In this paper, we investigate and optimize power consumption and energy efficiency of a Radio-over-Fiber distributed antenna system (RoF DAS) for railway. Based on the model, optimum system design in terms of remote antenna cell size and number of cells in a WDM ring are derived with respect to system energy consumption and efficiency. From the model we can also determine an appropriate scheme to upgrade a currently deployed conventional cellular network to a system employing RoF DAS technology. The power consumption and energy efficiency of the conventional and the upgraded systems are compared. The results demonstrate a significant save of power consumption and remarkable enhancement of energy efficiency when using a RoF DAS system. © 2013 SPIE.
DOI： 10.1117/12.2002382
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Phase noise measurement of optical heterodyning two-tone signal generated by two free-running lasers 査読あり
Ryuta Yamanaka, Taka Fujita, Hideyuki Sotobayashi, Atsushi Kanno, Tetsuya Kawanishi
IEICE Transactions on Electronics E96-C ( 2 ) 241 - 244 2013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：Institute of Electronics, Information and Communication, Engineers, IEICE
We evaluated the single side-band phase noise of a 40 GHz beat signal generated by two free-running lasers. This allowed us to verify the utility of the two free-running lasers is verified as a light source for a next-generation radio-over-fiber system using frequency such as those in the millimeter-wave and terahertz bands. We also measured the phase noise of a frequency quadrupler using a Mach-Zehnder modulator for comparison. The phase noise of the two free-running lasers and the frequency quadrupler are - 63.85 and -95.22 dBc/Hz at a 10 kHz offset frequency, respectively. Copyright © 2013 The Institute of Electronics, Information and Communication Engineers.
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Performance of Wi-Fi signal transmisison-over-a seamlessly integrated radio-over-fiber and 90-GHz wireless system 査読あり
Pham Tien Dat, Atsushi Kanno, Tetsuya Kawanishi
2013 IEEE International Topical Meeting on Microwave Photonics, MWP 2013 321 - 324 2013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：IEEE Computer Society
The transmission of a WLAN 802.11g signal over a seamlessly integrated radio-over-fiber and millimeter-wave-wireless system at 90-GHz band is analyzed theoretically and experimentally evaluated. We successfully transmitted and demodulated the signal at 18 Mb/s and 24 Mb/s using QPSK and 16-QAM modulation over the proposed system. It is shown that the quality of signal transmission was satisfied compared to the standard. © 2013 IEEE.
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Performance Evaluation of LTE Signal Transmission Over a Seamlessly Integrated Radio-Over-Fiber and Millimeter-Wave Wireless Link 査読あり
Pham Tien Dat, Atsushi Kanno, Tetsuya Kawanishi
2013 IEEE GLOBECOM WORKSHOPS (GC WKSHPS) 748 - 753 2013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：IEEE
Transmission of 3GPP LTE signal over a seamlessly integrated radio-over-fiber and millimeter-wave wireless link is theoretically analyzed and experimentally demonstrated. We successfully transmitted and demodulated standard LTE eNB conformance test signals using QPSK, 16-QAM and 64-QAM modulation format for user data over the proposed system. The measured EVM is well under the required limit defined for the test signals, showing the potential to use the link as a high capacity backhauling system for high speed mobile networks using small cells and/or high carrier frequency at millimeter-wave.
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Optical FM-CW signal generation for millimeter-wave imaging and OFDR applications 査読あり
Atsushi Kanno, Tetsuya Kawanishi
2013 IEEE Avionics, Fiber-Optics and Photonics Technology Conference, AVFOP 2013 51 - 52 2013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：IEEE Computer Society
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Optical FM-CW signal generation for millimeter-wave and optical imaging 査読あり
Atsushi Kanno, Tetsuya Kawanishi
2013 IEEE INTERNATIONAL TOPICAL MEETING ON MICROWAVE PHOTONICS (MWP) 108 - 111 2013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：IEEE
Optical frequency-modulated continuous-wave (FM-CW) signal generation based on a high-precision optical modulation technique is successfully demonstrated for full-band millimeter-wave (MMW) radar in the W-band (75-110 GHz) and detection of an optical fiber cut by optical frequency domain reflectometry. The optical frequency up-converter based on radio-over-fiber technology creates a high-speed pulse of the FM-CW signal with broad bandwidths, and the signal degradation agrees with theoretically estimated values. The dual purpose of the optical FM-CW signal for MMW and optical imaging will be useful for a distributed antenna radar system with a MMW signal and sensing of the optical distribution network.
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Millimeter-Wave Signal Generation Using Optical Difference Frequency Generation in Rectangular Waveguide Embedded with LiTaO3 査読あり
Hiroshi Murata, Yuto Maejima, Yasuyuki Okamura, Atsushi Kanno, Tetsuya Kawanishi
2013 EUROPEAN MICROWAVE CONFERENCE (EUMC) 870 - 873 2013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：IEEE
Millimeter-wave signal generation devices using difference frequency generation based on the second order nonlinear optical effect in rectangular waveguide circuits were studied in detail theoretically and experimentally. 60GHz-band signals were successfully obtained from fabricated proto-type devices using a straight rectangular waveguide with z-cut LiTaO3 crystal. T-branching waveguide devices are also proposed to obtain an enhanced output signal.
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Large-capacity transmission over a 19-core fiber 査読あり
Jun Sakaguchi, Benjamin J. Puttnam, Werner Klaus, Jose Manuel Delgado Mendinueta, Yoshinari Awaji, Naoya Wada, Atsushi Kanno, Tetsuya Kawanishi
2013 OPTICAL FIBER COMMUNICATION CONFERENCE AND EXPOSITION AND THE NATIONAL FIBER OPTIC ENGINEERS CONFERENCE (OFC/NFOEC) 2013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：IEEE
We discuss the recent progress of space division multiplexed transmission using a 19-core fiber. We find that high core-number multi-core fibers can both enable large transmission capacity and potentially reduce system costs and power consumption.
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Impact of wave propagation delay on latency in optical communication systems 査読あり
Tetsuya Kawanishi, Atsushi Kanno, Yuki Yoshida, Ken-ichi Kitayama
OPTICAL METRO NETWORKS AND SHORT-HAUL SYSTEMS V 8646 2013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：SPIE-INT SOC OPTICAL ENGINEERING
Latency is an important figure to describe performance of transmission systems for particular applications, such as data transfer for earthquake early warning, transaction for financial businesses, interactive services such as online games, etc. Latency consists of delay due to signal processing at nodes and transmitters, and of signal propagation delay due to propagation of electromagnetic waves. The lower limit of the latency in transmission systems using conventional single mode fibers (SMFs) depends on wave propagation speed in the SMFs which is slower than c. Photonic crystal fibers, holly fibers and large core fibers can have low effective refractive indices, and can transfer light faster than in SMFs. In free-space optical systems, signals propagate with the speed c, so that the latency could be smaller than in optical fibers. For example, LEO satellites would transmit data faster than optical submarine cables, when the transmission distance is longer than a few thousand kilometers. This paper will discuss combination of various transmission media to reduce negative impact of the latency, as well as applications of low-latency systems.
DOI： 10.1117/12.1000190
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Highly frequency-stabilized millimeter-wave signal generation using optical phase-locked loop and flat optical frequency comb 査読あり
Ryuta Yamanaka, Ryo Matsumoto, Hideyuki Sotobayashi, Atsushi Kanno, Tetsuya Kawanishi
Pacific Rim Conference on Lasers and Electro-Optics, CLEO - Technical Digest 2013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）
We demonstrated millimeter-wave signal generation using optical phase-locked loop and flat optical frequency comb generation using a Mach-Zehnder modulator. The generated optical multi-tone signal has high frequency stability and optical signal-to-noise ratio. © 2013 IEEE.
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Characterization of APD-PIN photodiodes using InAs/InAlGaAs quantum-dot absorption layer
T. Umezawa, K. Akahane, A. Kanno, T. Kawanishi
CLEO: Science and Innovations, CLEO_SI 2013 CTh4J.8 2013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）
We found avalanche multiplications in InAs/InAlGaAs quantum-dot PIN photodiodes, and characterized the temperature dependence of I-V curves, the multiplication factors and the RF responses. © OSA 2013.
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Coherent optical and radio seamless transmission based on DSP-aided radio-over-fiber technology
Atsushi Kanno, Toshiaki Kuri, Iwao Hosako, Tetsuya Kawanishi, Yuki Yoshida, Yoshihiro Yasumura, Ken-Ichi Kitayama
2013 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference, OFC/NFOEC 2013 2013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）
We propose and demonstrate a coherent optical and radio seamless transmission system for enhancing network resilience. By using radio-over-fiber technology with digital-signal-processing-aided coherent detection, high capacity optical/radio transmission can be achieved. © 2013 OSA.
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Optical and millimeter-wave radio seamless MIMO transmission based on a radio over fiber technology 査読あり
Atsushi Kanno, Toshiaki Kuri, Iwao Hosako, Tetsuya Kawanishi, Yuki Yoshida, Yoshihiro Yasumura, Ken-ichi Kitayama
OPTICS EXPRESS 20 ( 28 ) 29395 - 29403 2012年12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
Multi-input multi-output (MIMO) transmission of two millimeter-wave radio signals seamlessly converted from polarization-division-multiplexed quadrature-phase-shift-keying optical signals is successfully demonstrated, where a radio access unit basically consisting of only optical-to-electrical converters and a radio receiver performs total signal equalization of both the optical and the radio paths and demodulation with digital signal processing (DSP). Orthogonally polarized optical components that are directly converted to two-channel radio components can be demultiplexed and demodulated with high-speed DSP as in optical digital coherent detection. 20-Gbaud optical and radio seamless MIMO transmission provides a total capacity of 74.4 Gb/s with a forward error correction overhead of 7%. (C) 2012 Optical Society of America
DOI： 10.1364/OE.20.029395
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Polarization division multiplexed 4 x 10 Gbps simultaneous transmissions in 1.0-mu m waveband and C-waveband over a 14.4-km-long holey fiber using an ultra-broadband photonic transport system 査読あり
Yu Omigawa, Naokatsu Yamamoto, Atsushi Kanno, Tetsuya Kawanishi, Yasuaki Kurata, Hideyuki Sotobayashi
OPTICS EXPRESS 20 ( 14 ) 14864 - 14870 2012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：OPTICAL SOC AMER
Polarization division multiplexing (PDM) and wavelength division multiplexing (WDM) are essential techniques for enhancing the capacity of photonic networks and facilitating the efficient use of optical frequency resources. 2 PDM x 2 WDM x 10 Gbps error-free simultaneous transmissions in the 1.0-mu m waveband and C-waveband are successfully demonstrated for the first time using an ultra-broadband photonic transport system over a 14.4-km-long holey fiber transmission line. (c) 2012 Optical Society of America
DOI： 10.1364/OE.20.014864
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19-core fiber transmission of 19x100x172-Gb/s SDM-WDM-PDM-QPSK signals at 305Tb/s 査読あり
Jun Sakaguchi, Benjamin J. Puttnam, Werner Klaus, Yoshinari Awaji, Naoya Wada, Atsushi Kanno, Tetsuya Kawanishi, Katsunori Imamura, Harumi Inaba, Kazunori Mukasa, Ryuichi Sugizaki, Tetsuya Kobayashi, Masayuki Watanabe
2012 Optical Fiber Communication Conference(OFC) PDP5C.1 2012年03月
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Space Division Multiplexed Transmission of 109-Tb/s Data Signals Using Homogeneous Seven-Core Fiber
Jun Sakaguchi, Yoshinari Awaji, Naoya Wada, Atsushi Kanno, Tetsuya Kawanishi, Tetsuya Hayashi, Toshiki Taru, Tetsuya Kobayashi, Masayuki Watanabe
JOURNAL OF LIGHTWAVE TECHNOLOGY 30 ( 4 ) 658 - 665 2012年02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 achieved record 109-Tb/s transmission over 16.8 km, using space division multiplexing (SDM) together with conventional multiplexing technology. 7-core SDM, 97 WDM (100-GHz spacing), 2 x 86 Gb/s PDM-QPSK signals were used. The spectral efficiency was 11.2 b/s/Hz. SDM transmission was realized using a multi-core fiber with ultra-low-crosstalk (less than -90.0 dB/km at 1550 nm) and high performance SDM MUX/DEMUX. The overall SDM crosstalk of -53 dB caused almost no penalty for the PDM-QPSK transmission.
