論文 - 菅野 敦史
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Low-Latency Fiber-Wireless Bridge for Flexible Fronthauling in Future Mobile Networks 査読あり
Pham Tien Dat, Atsushi Kanno, Tetsuya Kawanishi
2015 10TH EUROPEAN MICROWAVE INTEGRATED CIRCUITS CONFERENCE (EUMIC) 305 - 308 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：IEEE
We propose a flexible and low-latency cascaded fiber-wireless system for future mobile fronthauling using seamless combination of fiber-optic and millimeter-wave links. Successful transmission of intraband and interband carrier aggregation LTE-A signals over the system is experimentally confirmed. Satisfactory performance is achieved owing to the use of a high-quality optical millimeter-wave signal generation technique at the transmitter and a proposed high-performance self-homodyne detection at the receiver.
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Bidirectional Transmission of LTE-A Carrier Aggregation Signal over a Seamless Fiber-Wireless System in W-Band 査読あり
Pham Tien Dat, Atsushi Kanno, Tetsuya Kawanishi
2015 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC) 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：IEEE
We present a high-speed and low-latency seamless fiber-millimeter-wave system for future mobile front-haul networks. The bidirectional transmission of a downlink interband and an uplink intraband carrier aggregation LTE-A signal over the system is successfully demonstrated.
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Pure Single-Sideband Modulation Using High Extinction-Ratio Parallel Mach-Zehnder Modulator with Third-Order Harmonics Superposition Technique 査読あり
Yuya Yamaguchi, Atsushi Kanno, Tetsuya Kawanishi, Masayuki Izutsu, Hirochika Nakajima
2015 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) 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：IEEE
We demonstrate high spurious suppression ratio single-sideband modulation by a high extinction-ratio parallel Mach-Zehnder modulator. An electrical third-order nonlinearity suppression technique can enhance the suppression ratio as high as 47 dB.
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Experimental Evaluation of the Time and Frequency Crosstalk Dependency in a 7-Core Multi-Core Fiber 査読あり
Ruben S. Luis, Benjamin J. Puttnam, Werner Klaus, Jose Manuel Delgado Mendinueta, Yoshinari Awaji, Naoya Wada, Atsushi Kanno, Tetsuya Kawanishi, Tetsuya Nakanishi, Tetsuya Hayashi, Takashi Sasaki
2015 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC) 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：IEEE
We experimentally evaluate the time-varying crosstalk frequency response of a multicore fiber. Our findings suggest that dynamically adaptive transmission would be able to exploit this behavior, to improve the performance of crosstalk-limited links.
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Dynamic small-signal chirp characteristics of external and integrated modulators 査読あり
Ukrit Mankong, Praimezt Mekbungwan, Keizo Inagaki, Atsushi Kanno, Tetsuya Kawanishi
2015 INTERNATIONAL TOPICAL MEETING ON MICROWAVE PHOTONICS (MWP) 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：IEEE
We demonstrate that our recently proposed chirp measurement technique can be applied to the measurement and visualization of the small-signal dynamic chirp characteristics of modulators in vector space for the first time. Both discrete modulators and those integrated in externally modulated laser modules can be characterized by this method. The results agree with existing method to the first order approximation, whilst dynamic chirp change can also be measured during amplitude transition.
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Bias free operational 107-Gbaud ultra-fast photodetector 査読あり
T. Umezawa, K. Akahane, N. Yamamoto, A. Kanno, T. Kawanishi
ECOC 2015 41ST EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION 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：IEEE
We designed a high-baud-rate UTC photodetector without a bias circuit for the first time. The photodetector's wideband frequency response over 100 GHz and clear eye diagrams up to 107 Gbaud were confirmed at 0 V. Bit error rate is discussed for 56 Gbaud and 107 Gbaud.
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FIBER-REMOTED 96-GHz RADAR SYSTEM 査読あり
Atsushi Kanno, Tetsuya Kawanishi
2015 IEEE AVIONICS AND VEHICLE FIBER-OPTICS AND PHOTONICS CONFERENCE (AVFOP) 59 - 60 2015年
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High-Speed and Low-Latency Front-haul System for Heterogeneous Wireless Networks Using Seamless Fiber-Millimeter-Wave 査読あり
Pham Tien Dat, Atsushi Kanno, Tetsuya Kawanishi
2015 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC) 994 - 999 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：IEEE
We propose a novel high-capacity and low-latency front-haul system for small cells-based heterogeneous wireless networks. We experimentally demonstrate a proof-of-concept seamless convergence of radio-over-fiber (RoF) and millimeter-wave (MMW) system at 90 GHz for high-speed wireless signal transmission. Simultaneous transmission and demodulation of standard-compliant very-high-throughput WLAN IEEE 802.11ac and high-speed LTE-A signals over the system are successfully confirmed for the downlink direction. Satisfactory transmission performance over the converged 10-km RoF and a 5-m 90-GHz wireless link is achieved. The measured root-mean-square error vector magnitude is much better than the requirement defined by the standards.
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Optical Frequency-Interleaving Full-Duplex Technique for Fiber-Optic Transmission of 96-GHz-Band Frequency-Modulated Continuous-Wave Downlink Signal and 10-Gb/s On-Off-Keying Uplink Signal 査読あり
Toshiaki Kuri, Atsushi Kanno, Tetsuya Kawanishi
2015 OPTO-ELECTRONICS AND COMMUNICATIONS CONFERENCE (OECC) 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：IEEE
An optical frequency-interleaving full-duplex technique for fiber-optic transmission of 96-GHz-band frequency-modulated continuous-wave downlink signal and 10-Gb/s on-off-keying uplink signal is newly proposed. The proposed full-duplexing technique with a flexible wavelength channel selector is experimentally demonstrated.
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5G TRANSPORT AND BROADBAND ACCESS NETWORKS: THE NEED FOR NEW TECHNOLOGIES AND STANDARDS 査読あり
Pham Tien Dat, Atsushi Kanno, Naokatsu Yamamoto, Tetsuya Kawanishi
2015 ITU Kaleidoscope: Trust in the Information Society (K-2015) 159 - 166 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：IEEE
In addition to new radio technologies, end-to-end transport networks will play a vital role in future 5G (and beyond) networks. In particular, access transport networks connecting radio access with core networks are of critical importance. They should be able to support massive connectivity, super high data rates, and real time services in a ubiquitous environment. To attain these targets, transport networks should be constructed on the basis of a variety of technologies and methods, depending on application scenarios, geographical areas, and deployment models. In this paper, we present several technologies, including analog radio-over-fiber transmission, intermediate-frequency-over-fiber technology, radio-on-radio transmission, and the convergence of fiber and millimeter-wave systems, that can facilitate building such effective transport networks in many use cases. For each technology, we present the system concept, possible application cases, and some demonstration results. We also discuss potential standardization and development directions so that the proposed technologies can be widely used.
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High Conversion Gain, Low Power Consumption W-Band Photoreceiver Integrated with UTC-PD and InP-PHEMT Amplifier 査読あり
T. Umezawa, K. Akahane, A. Kanno, N. Yamamoto, K. Kashima, T. Kawanishi
2015 INTERNATIONAL TOPICAL MEETING ON MICROWAVE PHOTONICS (MWP) 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：IEEE
In this study, we successfully fabricated a W-band high-power photoreceiver with high output power and low power consumption. This W-band photoreceiver was integrated with a bias-free uni-travelling carrier photodetector (UTC-PD) and an InP high electron mobility transistor (PHEMT) amplifier for the first time. An ultrabroad 3 dB bandwidth beyond 110 GHz in an UTC-PD and maximum oscillation frequency of 320 GHz in a PHEMT low-noise amplifier were used for this hybrid integration. At 109 GHz, a high radio frequency output power of +10 dBm, high transimpedance gain of 828 boxed times, and low power consumption of 67 mW was achieved in an optical-electrical converting process.
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Fiber-remoted 20-Gbaud QPSK transmission at 300 GHz 査読あり
Atsushi Kanno, Norihiko Sekine, Iwao Hosako, Tetsuya Kawanishi, Yuki Yoshida, Ken-ichi Kitayama
2015 INTERNATIONAL TOPICAL MEETING ON MICROWAVE PHOTONICS (MWP) 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：IEEE
300-GHz multilevel signal transmission over optical fibers and air is demonstrated using advanced optical communication technology including optical frequency comb generation. Local oscillator signal transport over optical fibers to optical-terahertz converters removes the need for setting any terahertzcapable oscillators in the converters. This fiber-remoted configuration with seamless conversion between the optical and terahertz signals is compatible with high-speed terahertz backhaul and fronthaul links.
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Digital coherent W-band MIMO radio-over-fiber systems 査読あり
Ken-Ichi Kitayama, Yuki Yoshida, Atsushi Kanno, Tetsuya Kawanishi
Signal Processing in Photonic Communications, SPPCom 2015 262 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：Optical Society of America (OSA)
We present digital coherent W-band MIMO RoF system and its collected digital signal processing for optical and wireless signal. Its high resilience of dual optical wireless link will find immediate application to disaster recovery. © 2015 OSA.
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Coherent detection in self-homodyne systems with single and multi-core transmission 査読あり
Ruben S. Luís, Benjamin J. Puttnam, José-Manuel D. Mendinueta, Ali Shahpari, Zoran Vujičić, Werner Klaus, Jun Sakaguchi, Yoshinari Awaji, Antonio Teixeira, Naoya Wada, Tetsuya Kawanishi, Atsushi Kanno
Proceedings of SPIE - The International Society for Optical Engineering 9389 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：SPIE
This work reviews the latest advancements in coherent self-homodyne detection (SHD) using signals with polarizationor space-multiplexed pilot tones (PTs) originating from the same light source, towards the implementation of low-cost coherent receivers. The coherency between signals and PTs drastically reduces laser linewidth requirements, enabling the use of high-order modulation formats with low-cost DFB lasers. In this work, we revise the application of SHD in high-capacity space-division multiplexed links using multi-core fibers, outlining optical signal-to-noise ratio, skew and phase noise requirements of such systems. Furthermore, we evaluate the application of SHD for the implementation of laser-less optical network units in passive optical networks, as well as recent developments in digital SHD techniques.
DOI： 10.1117/12.2081686
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Broadband Millimeter-Wave Electro-Optic Modulator Using Multi Patch Antennas for Pico-Cell Radar Networks 査読あり
Yusuf Nur Wijayanto, Atsushi Kanno, Tetsuya Kawanishi
INTERNATIONAL SEMINAR ON PHOTONICS, OPTICS, AND ITS APPLICATIONS (ISPHOA 2014) 9444 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：SPIE-INT SOC OPTICAL ENGINEERING
An electro-optic (EO) modulator using multi patch antennas is proposed for broadband millimeter-wave bands in pico-cell radar networks. The proposed device is composed of multi patch antennas with a gap fabricated on a LiNbO3 crystal bonded with a low-k dielectric material. Multiple millimeter-wave operational frequencies can be received by the multi patch antennas and converting directly to lightwave signals through the Pockel effects of the LiNbO3 crystal. By adjusting the metal patch size for receiving with relatively close millimeter-wave frequencies, the bandwidth of the EO modulator can be enlarged. Based on that, bandwidth of over 30% in millimeter-wave bands can be achieved using the proposed device.
DOI： 10.1117/12.2075142
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Analog signal transmission by FPGA-based pseudo-delta-sigma modulator 査読あり
Atsushi Kanno, Tetsuya Kawanishi
2015 PHOTONICS CONFERENCE (IPC) 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：IEEE
We present a pseudo-delta-sigma modulator and demonstrate transmission using an advanced modulation. This digitally implemented transmitter helps in reducing the complexity at the receiver and realizing waveform transport over a digital optical network.
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Advanced Photonics for Wired and Wireless Seamless Networks 査読あり
Tetsuya Kawanishi, Atsushi Kanno, Pham Tien Dat, Atsushi Matsumoto, Naokatsu Yamamoto
2015 17th International Conference on Transparent Optical Networks (ICTON) 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：IEEE
Wired and wireless seamless networks comprised of optical-fiber and radio-wave links can provide high-speed, resilient, and flexible broadband services, one of the important requirements for which is the precise and highspeed control of light waves based on advanced photonic technologies such as digital coherent detection, highspeed electro-optic conversion, and radio-over-fiber. In this paper, we focus on advanced photonic devices for optical and radio-wave links and on the expected performance and function of seamless networks.
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300-GHz Versatile Transceiver Front-End for Both Communication and Imaging 査読あり
A. Kanno, N. Sekine, Y. Uzawa, I. Hosako, T. Kawanishi
2015 40TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER AND TERAHERTZ WAVES (IRMMW-THZ) 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：IEEE
Envelope-detector-based transceiver configurations are useful for both digital signal transmission and radar systems in the terahertz band. A dual-purpose transceiver is demonstrated using a 1-Gb/s on-off keying signal and 12.5-GHz-bandwidth frequency-modulated continuous-wave radar.
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300-GHz FM-CW radar system by optical frequency comb generation 査読あり
Atsushi Kanno, Norihiko Sekine, Yoshinori Uzawa, Iwao Hosako, Tetsuya Kawanishi
2015 45TH EUROPEAN MICROWAVE CONFERENCE (EUMC) 558 - 561 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：IEEE
In this paper, we demonstrate a 300-GHz FM-CW radar using optical modulation technology. An optical frequency comb based on the optical modulation is utilized as a broadband frequency multiplier with a factor of 12. At a central frequency of 300 GHz, we generate a 12-GHz-bandwidth FM-CW signal with a pulse duration of 10 mu s, realizing a precise ranging with a resolution of several centimeters. We show that the optical frequency comb generator is capable of generating larger bandwidth FM-CW signals.
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20-Gb/s QPSK Transmission Over 10-km-long Holey Fiber Using a Wavelength Tunable Quantum Dot Light Source in O-band 査読あり
Akihiro Murano, Fumiya Yagi, Naokatsu Yamamoto, Atsushi Kanno, Tetsuya Kawanishi, Hideyuki Sotobayashi
OPTICAL METRO NETWORKS AND SHORT-HAUL SYSTEMS VII 9388 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：SPIE-INT SOC OPTICAL ENGINEERING
We successfully demonstrate 20-Gb/s quadrature phase-shift keying (QPSK) signal transmission. The transmission was carried out over endlessly single-mode holey fiber in the waveband of 1276.02-1304.26 nm, whose bandwidth of 5.09-THz is broader than the traditional C-band. A wavelength-tunable quantum dot (QD) laser with broad wavelength tunability helps realize bandwidth availability. A single InAs/InGaAs QD optical gainchip was grown using a sandwiched sub-nanometer separator technique in the wavelength of 1.3-mu m band. Using this gain chip, the QD light source has good wavelength stability, compactness and wavelength tunablility. The measured transmission results show bit error rates within a forward error correction limit of 2x10(-3) using intradyne coherent detection with offline digital signal processing. In this study, it is expected that abundant frequency resources such as the O-band are coherently enhanced by the use of a large number of wavelength channels by effectively using the QD-laser.
DOI： 10.1117/12.2078118
