論文 - 菅野 敦史
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Radio-over-fiber-based seamless fiber-wireless convergence for small cell and linear cell networks 査読あり
Pham Tien Dat, Atsushi Kanno, Naokatsu Yamamoto, Tetsuya Kawanishi
Optics InfoBase Conference Papers 2018 2018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：OSA - The Optical Society
We present radio-over-fiber technologies for fiber and wireless convergence for small cell and linear cell networks, including a flexible and low-latency mobile fronthaul for ultra-dense small cells, and high-speed wireless backhaul system for high-speed trains.
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Study of high power generation in UTC-PD at 110-210 GHz 査読あり
Toshimasa Umezawa, Atsushi Kanno, Kouichi Akahane, Atsushi Matsumoto, Naokatsu Yamamoto, Tetsuya Kawanishi
Proceedings of SPIE - The International Society for Optical Engineering 10531 2018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
We designed and fabricated a low-bias operational uni-travelling carrier photodiode (UTC-PD) structure, which can be operated at over 100 GHz. The main structure of the device consisted of p-doped InGaAs for the photo-absorption layer and non-doped InP for the carrier collector layer, to obtain both a high electron drift velocity at a low bias and a small CR time constant based on the pn-junction capacitance. Through an on-wafer probing test, the frequency response was measured up to 210 GHz using a 1 mm coaxial connecter type (DC-110GHz), W-band (75-110 GHz) and G-band (140-220 GHz) waveguide probe with a spectrum analyzer. In the measurement results, a large bandwidth of 10 MHz-110 GHz could be obtained with good flatness within ±1 dB. When the W-band and G-band performance were characterized, the high-power characteristic of -3.8 dBm could be achieved at 106 GHz. and the output power level of - 19.8 dBm could be confirmed at 210 GHz as well.
DOI： 10.1117/12.2287589
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W-band radio-over-fiber link based on self-oscillating optical frequency comb generator 査読あり
G. K.M. Hasanuzzaman, Atsushi Kanno, Pham Tien Dat, Stavros Iezekiel
Optics InfoBase Conference Papers 2018 2018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：OSA - The Optical Society
A 94.8 GHz radio-over-fiber link was implemented with a self-oscillating frequency comb. An LTE Advanced OFDM FDD 64-QAM signal of 20 MHz bandwidth was transmitted over 1.3 m wireless distance with an EVM of 2.23%.
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Wave-band multiplexed 20-Gb/s QPSK simultaneous transmission over 4-km holey fiber in O- and T-bands with homodyne detection 査読あり
Shoko Yamada, Atsushi Kanno, Naokatsu Yamamoto, Hideyuki Sotobayashi
Proceedings of SPIE - The International Society for Optical Engineering 10561 2018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
A sharp growth in the transmission capacities of photonic transport networks has necessitated an increase in the spectral efficiency and number of wavelength channels. Advanced photonic transport technology in the T-band (thousand band: 1000-1260 nm, available bandwidth of 61.9 THz) is a promising solution to expanding the usable wavelength channels for optical communication to increase the available capacity. The available bandwidth in the T-band is approximately five times that of the conventional C- and L-bands, and, therefore, we propose an ultra-broadband photonic transport system that employs waveband multiplexing technology which is compatible with both novel and conventional wavebands. Wavelength-tunable quantum dot (QD) laser technologies aid the availability of the T-band with its wide wavelength tunability. An endlessly single-mode holey fiber (HF) is used as a wave-band multiplexing transmission line in the O- and T-bands. Optimizing the spectral efficiency is key to realizing high-capacity transmission using advanced digital signal processing (DSP) technology with a coherent detection scheme. In the study, we successfully demonstrated error-free transmission with 20-Gb/s quadrature phase-shift keying (QPSK) using homodyne detection receivers in the O- and T-bands simultaneously over a 4-km long HF. The measured bit error rates (BERs) were within the forward error correction limit of 2×10-3 in both the O- and T-bands. The large number of wavelength channels with conventional use of the O- and T-bands should help increase the total capacity of an optical fiber to meet the growth in demand of optical communication data traffic.
DOI： 10.1117/12.2288966
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High-speed and handover-free communications for high-speed trains using switched WDM fiber-wireless system 査読あり
Pham Tien Dat, Atsushi Kanno, Keizo Inagaki, Toshimasa Umezawa, François Rottenberg, Je´rome Louveaux, Naokatsu Yamamoto, Tetsuya Kawanishi
Optics InfoBase Conference Papers 2018 2018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：OSA - The Optical Society
A high-speed, handover-free communication for high-speed trains by a switched WDM fiber-wireless system in the W-band is presented. More than 20 Gb/s signal transmission with a cell switching time of less than 4 μs is experimentally demonstrated.
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Wave-band multiplexed 20-Gb/s QPSK simultaneous transmission over 4-km holey fiber in O- and T-bands with homodyne detection 査読あり
Shoko Yamada, Atsushi Kanno, Naokatsu Yamamoto, Hideyuki Sotobayashi
Proceedings of SPIE - The International Society for Optical Engineering 10561 2018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
A sharp growth in the transmission capacities of photonic transport networks has necessitated an increase in the spectral efficiency and number of wavelength channels. Advanced photonic transport technology in the T-band (thousand band: 1000-1260 nm, available bandwidth of 61.9 THz) is a promising solution to expanding the usable wavelength channels for optical communication to increase the available capacity. The available bandwidth in the T-band is approximately five times that of the conventional C- and L-bands, and, therefore, we propose an ultra-broadband photonic transport system that employs waveband multiplexing technology which is compatible with both novel and conventional wavebands. Wavelength-tunable quantum dot (QD) laser technologies aid the availability of the T-band with its wide wavelength tunability. An endlessly single-mode holey fiber (HF) is used as a wave-band multiplexing transmission line in the O- and T-bands. Optimizing the spectral efficiency is key to realizing high-capacity transmission using advanced digital signal processing (DSP) technology with a coherent detection scheme. In the study, we successfully demonstrated error-free transmission with 20-Gb/s quadrature phase-shift keying (QPSK) using homodyne detection receivers in the O- and T-bands simultaneously over a 4-km long HF. The measured bit error rates (BERs) were within the forward error correction limit of 2×10-3 in both the O- and T-bands. The large number of wavelength channels with conventional use of the O- and T-bands should help increase the total capacity of an optical fiber to meet the growth in demand of optical communication data traffic.
DOI： 10.1117/12.2288966
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W-band radio-over-fiber link based on self-oscillating optical frequency comb generator 査読あり
G. K.M. Hasanuzzaman, Atsushi Kanno, Pham Tien Dat, Stavros Iezekiel
Optics InfoBase Conference Papers 2018 2018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：OSA - The Optical Society
A 94.8 GHz radio-over-fiber link was implemented with a self-oscillating frequency comb. An LTE Advanced OFDM FDD 64-QAM signal of 20 MHz bandwidth was transmitted over 1.3 m wireless distance with an EVM of 2.23%.
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Study of high power generation in UTC-PD at 110-210 GHz 査読あり
Toshimasa Umezawa, Atsushi Kanno, Kouichi Akahane, Atsushi Matsumoto, Naokatsu Yamamoto, Tetsuya Kawanishi
Proceedings of SPIE - The International Society for Optical Engineering 10531 2018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
We designed and fabricated a low-bias operational uni-travelling carrier photodiode (UTC-PD) structure, which can be operated at over 100 GHz. The main structure of the device consisted of p-doped InGaAs for the photo-absorption layer and non-doped InP for the carrier collector layer, to obtain both a high electron drift velocity at a low bias and a small CR time constant based on the pn-junction capacitance. Through an on-wafer probing test, the frequency response was measured up to 210 GHz using a 1 mm coaxial connecter type (DC-110GHz), W-band (75-110 GHz) and G-band (140-220 GHz) waveguide probe with a spectrum analyzer. In the measurement results, a large bandwidth of 10 MHz-110 GHz could be obtained with good flatness within ±1 dB. When the W-band and G-band performance were characterized, the high-power characteristic of -3.8 dBm could be achieved at 106 GHz. and the output power level of - 19.8 dBm could be confirmed at 210 GHz as well.
DOI： 10.1117/12.2287589
-
Radio-over-fiber-based seamless fiber-wireless convergence for small cell and linear cell networks 査読あり
Pham Tien Dat, Atsushi Kanno, Naokatsu Yamamoto, Tetsuya Kawanishi
Optics InfoBase Conference Papers 2018 2018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：OSA - The Optical Society
We present radio-over-fiber technologies for fiber and wireless convergence for small cell and linear cell networks, including a flexible and low-latency mobile fronthaul for ultra-dense small cells, and high-speed wireless backhaul system for high-speed trains.
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Radio over fiber network technology for millimeter-wave distributed radar systems 査読あり
Atsushi Kanno
Proceedings of SPIE - The International Society for Optical Engineering 10559 2018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
Millimeter-wave radar technology in a frequency band of 96 GHz is promising to detect small objects with a high range resolution because of its short wavelength and broadness of available bandwidths of 8 GHz. However, transmission distance in the millimeter-wave bands is limited by high atmospheric attenuation. Radio over fiber (RoF) technology should be implemented to transport these millimeter-wave signals to remote radar heads via an optical fiber network. In the study, we discuss the RoF network for distributed radar systems in the millimeter-wave and submillimeter-wave bands.
DOI： 10.1117/12.2287731
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High-speed two-dimensional photodetector array for 4- WDM 25-Gbaud FSO communication 査読あり
Toshimasa Umezawa, Takahide Sakamoto, Atsushi Kanno, Kouich Akahane, Atsushi Matsumoto, Naokatsu Yamamoto, Tetsuya Kawanishi
Optics InfoBase Conference Papers 2018 2018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：OSA - The Optical Society
We present a newly developed 32-pixel high-speed 2D photodetector array operated at up to 39 Gbaud, and its application for WDM FSO communicat ions. 4-WDM 25-Gbaud FSO parallel beams could be directly detected by the 2D-PDA.
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Optical Modulator with the Digitized Transfer Function for Multilevel Amplitude Shift Keying
Yuya Yamaguchi, Atsushi Kanno, Naokatsu Yamamoto, Tetsuya Kawanishi
2018 EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION (ECOC) 2018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 and devise a digitized optical modulator for 4-ASK. The proposed device enables optical modulation and waveform shaping for multilevel amplitude shift keying simultaneously. The measured transfer function of the fabricated modulator shows good agreement with the designed function.
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Cell-Less Network for Handover-Free Communications to High-Speed Trains Using a Switched WDM Fiber-Wireless Backhaul.
Pham Tien Dat, Atsushi Kanno, Keizo Inagaki, Naokatsu Yamamoto, Tetsuya Kawanishi
European Conference on Optical Communication(ECOC) 1 - 3 2018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
DOI： 10.1109/ECOC.2018.8535484
その他リンク： https://dblp.uni-trier.de/db/conf/ecoc/ecoc2018.html#DatKIYK18
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O-L band bias-free high-speed UTC-PD for advanced optical fiber communications
Toshimasa Umezawa, Atsushi Kanno, Kouichi Akahane, Atsushi Matsumoto, Naokatsu Yamamoto
Optics InfoBase Conference Papers 2018 2018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：OSA - The Optical Society
In this report, we present an O-L band high-baud-rate UTC photodetector excluding a bias circuit, which can be operated at zero bias. The measured responsivity over 0.13 A/W was fully covered in the range (O-L), and the 100 Gbaud (NRZ) good eye diagram performances were confirmed at 0 V for wavelengths of 1320 nm and 1550 nm.
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Self-oscillating optical frequency comb: Application to low phase noise millimeter wave generation and radio-over-fiber link
Hasanuzzaman, G.K.M., Kanno, A., Dat, P.T., Iezekiel, S.
Journal of Lightwave Technology 36 ( 19 ) 2018年
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Optical frequency comb applied optoelectronic oscillator for millimeter-wave signal generation and its application
Atsushi Kanno, G. K.M. Hasanuzzaman, Naokatsu Yamamoto, Stavros Iezekiel
Proceedings of SPIE - The International Society for Optical Engineering 10634 2018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
Highly precise signal generation technique is a key for the realization of low-noise radar and ghost-less imaging in millimeter-wave bands. Current technologies based on an oven-controlled oscillator has a better phase noise characteristic
however, relatively low frequency requires multiplication technique to upconvert the signal into millimeter-wave range. In the study, we configured an optoelectronic oscillator (OEO) employed with an optical frequency comb generation using an optical modulator. An optical filter bank implemented in the OEO loop performs an optical path optimization to realize 95-GHz millimeter-wave signal with a phase noise of-86 dBc/Hz at an offset frequency of 10 kHz.DOI： 10.1117/12.2304821
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Radio over fiber network technologies for linear cell systems in millimeter-wave bands 査読あり
Atsushi Kanno, Pham Tien Dat, Naokatsu Yamamoto, Tetsuya Kawanishi
2017 International Symposium on Antennas and Propagation, ISAP 2017 2017- 1 - 2 2017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.
Millimeter-wave signal feeding technique to remote radio transceivers via an optical fiber network is discussed particularly in linear cell configurations using radio over fiber technologies. Double-sideband and single-sideband modulation schemes with suitable modulation frequency are demonstrated under 10-km-class optical fiber network configuration.
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Millimeter-wave electro-optic modulator using stacked patch-antennas embedded with micrometer-gap for radio-over-fiber system 査読あり
Hiroshi Murata, Hironori Aya, Toshiyuki Inoue, Atsushi Sanada, Yusuf Nur Wijayanto, Atsushi Kanno, Tetsuya Kawanishi
European Microwave Week 2017: "A Prime Year for a Prime Event", EuMW 2017 - Conference Proceedings; 47th European Microwave Conference, EuMC 2017 2017-January 628 - 631 2017年12月
掲載種別：研究論文（国際会議プロシーディングス）
© 2017 European Microwave Association. We propose a new wireless electro-optic (EO) modulator using multi-layered stacked patch-antennas with a narrow gap for radio-over-fiber systems. This device uses a structure of vertically stacked patch antennas like the Yagi-Uda antenna, with an EO crystal and a low-dielectric-constant material hybrid substrate. The electric field for optical modulation and the patch length are increased by using the multi-layered antenna stacked structure. Therefore, the conversion efficiency from wireless to optical signals can be improved. In the analysis by use of HFSS, the operational frequency was shifted to the higher region by 7 GHz, and the modulation efficiency improved by 3.2 dB with the double stacking structure. In the experiments, the improvement of the modulation efficiency by 3.0 dB was verified, and the measured frequency response and directivity were in good agreement with the designed ones. The conversion of wireless 60 GHz band signals with QPSK modulation and the transfer of the converted signal over 1 km long fiber were also demonstrated.
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Instantaneous freuqnecy measurement for broadband radio signals using optical single sideband modulation 査読あり
Tetsuya Kawanishi, Hideki Hayashi, Keizo Inagaki, Atsushi Kanno, Naokatsu Yamamoto
2017 International Symposium on Antennas and Propagation, ISAP 2017 2017- 1 - 2 2017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.
By using optical single sideband modulation, we demonstrated instantaneous frequency measurement, which would be useful to monitor wideband radio signals with agile frequency change.
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Wavelength-switchable if over fiber network under ultra-dense WDM configuration for high-speed railway systems 査読あり
Atsushi Kanno, Pham Tien Dat, Naokatsu Yamamoto, Tetsuya Kawanishi
30th Annual Conference of the IEEE Photonics Society, IPC 2017 2017- 591 - 592 2017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：Institute of Electrical and Electronics Engineers Inc.
Ultra-dense wavelength-division-multiplexing-based intermediate frequency over fiber system based on single-sideband suppressed carrier modulation at 15 GHz is demon- strated with a fast wavelength-tunable laser for tracking the train cars in high-speed train sys- tems by switching the wavelengths.
