論文 - 菅野 敦史
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A semiconductor optical amplifier comprising highly stacked InAs quantum dots fabricated using the strain-compensation technique 査読あり
Kouichi Akahane, Naokatsu Yamamoto, Toshimasa Umezawa, Atsushi Kanno, Tetsuya Kawanishi
JAPANESE JOURNAL OF APPLIED PHYSICS 53 ( 4 ) 2014年04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
A semiconductor optical amplifier was fabricated by incorporating highly stacked InAs quantum dots (QDs) as a gain media. Twenty InAs QD layers were successfully stacked through the strain-compensation technique, without any deterioration of crystal quality. A wide-range 1.55 mu m band gain was observed, and maximum gain reached 25 dB at 1530nm when the input power was below -40 dBm. (C) 2014 The Japan Society of Applied Physics
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Investigation of a 1.5-mu m-wavelength InAs-quantum-dot absorption layer for high-speed photodetector 査読あり
Toshimasa Umezawa, Kouichi Akahane, Atsushi Kanno, Tetsuya Kawanishi
APPLIED PHYSICS EXPRESS 7 ( 3 ) 2014年03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 investigated a 1.5-mu m-wavelength InAs-based quantum-dot (QD) absorption layer for high-speed and high-sensitivity photodetectors in advanced optical-fiber communications. The photodetector, which contained 20 stacked absorption layers of InAs/InGaAIAs QDs using the strain-compensation technique, exhibited a high absorption coefficient, avalanche multiplication effect, and a low dark current. It could operate at a low bias voltage for a p-type-intrinsic-n-type (PIN) diode structure. We expect that the 3-dB bandwidth at a low bias voltage would be approximately 50 GHz, and that the gain and bandwidth product in the avalanche multiplication region would be 150 GHz at a high bias voltage. (C) 2014 The Japan Society of Applied Physics
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Pump-linewidth-tolerant optical wavelength conversion for high-order QAM signals using coherent pumps 査読あり
Guo-Wei Lu, Andre Albuquerque, Benjamin J. Puttnam, Takahide Sakamoto, Miguel Drummond, Rogerio Nogueira, Atsushi Kanno, Satoshi Shinada, Naoya Wada, Tetsuya Kawanishi
OPTICS EXPRESS 22 ( 5 ) 5067 - 5075 2014年03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
Optical wavelength conversion (OWC) is expected to be a desirable function in future optical transparent networks. Since high-order quadrature amplitude modulation (QAM) is more sensitive to the phase noise, in the OWC of high-order QAM signals, it is crucial to suppress the extra noise introduced in the OWC subsystem, especially for the scenario with multiple cascaded OWCs. Here, we propose and experimentally demonstrate a pump-linewidth-tolerant OWC scheme suitable for high-order QAM signals using coherent two-tone pumps. Using 3.5-MHz-linewidth distributed feedback (DFB) lasers as pump sources, our scheme enables wavelength conversion of both 16QAM and 64QAM signals with negligible power penalty, in a periodically-poled Lithium Niobate (PPLN) waveguide based OWC. We also demonstrate the performance of pump phase noise cancellation, showing that such coherent two-tone pump schemes can eliminate the need for ultra-narrow linewidth pump lasers and enable practical implementation of low-cost OWC in future dynamic optical networks. (C)2014 Optical Society of America
DOI： 10.1364/OE.22.005067
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OSNR Penalty of Self-Homodyne Coherent Detection in Spatial-Division-Multiplexing Systems 査読あり
Ruben S. Luis, Benjamin J. Puttnam, Jose Manuel Delgado Mendinueta, Werner Klaus, Jun Sakaguchi, Yoshinari Awaji, Tetsuya Kawanishi, Atsushi Kanno, Naoya Wada
IEEE PHOTONICS TECHNOLOGY LETTERS 26 ( 5 ) 477 - 479 2014年03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
This letter presents a general model for the performance of spatial-division-multiplexing systems using self-homodyne detection. The model is applicable to single and dual polarization square M-quadrature amplitude modulation (QAM) signals, assuming arbitrary signal and pilot tone optical signal-to-noise ratios. Its validity is demonstrated using a seven-core multicore fiber link with quadrature phase shift keying and 16-QAM signals, comparing the performance of self-homodyne detection with intradyne detection.
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Heterogeneous Wireless Signal Transmission Using Seamless Fiber and Millimeter-Wave Convergence 査読あり
Pham Tien Dat, Atsushi Kanno, Tetsuya Kawanishi
2014 INTERNATIONAL CONFERENCE ON ADVANCED TECHNOLOGIES FOR COMMUNICATIONS (ATC) 776 - 779 2014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 proposed a seamless fiber-millimeter-wave converged system suitable to provide a high-speed and low-latency transmission for heterogeneous wireless signals. Satisfactory performance is experimentally confirmed for simultaneous transmission of high-speed LTE-A and very-high-throughput WLAN IEEE 802.11ac signals over the proposed system.
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Frequency-Stabilized Terahertz-Signal Generation Using an Optical Frequency Comb and an Injection-Locking Technique 査読あり
Atsushi Kanno, Tetsuya Kawanishi
2014 INTERNATIONAL TOPICAL MEETING ON MICROWAVE PHOTONICS (MWP) AND THE 2014 9TH ASIA-PACIFIC MICROWAVE PHOTONICS CONFERENCE (APMP) 150 - 152 2014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 comb source provides a terahertz-frequency-capable optical two-tone signal with an enhancement of the optical signal-to-noise ratio using an injection-locking technique. No phase-noise degradation between the signal with and without injection locking has been observed.
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Frequency-Quadruple Optical Two-Tone Signal Generation Using Integrated High Extinction-Ratio Mach-Zehnder Modulator 査読あり
Yuya Yamaguchi, Shinya Nakajima, Atsushi Kanno, Tetsuya Kawanishi, Masayuki Izutsu, Hirochika Nakajima
2014 INTERNATIONAL TOPICAL MEETING ON MICROWAVE PHOTONICS (MWP) AND THE 2014 9TH ASIA-PACIFIC MICROWAVE PHOTONICS CONFERENCE (APMP) 160 - 163 2014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 demonstrated frequency-quadruple optical two-tone signal generation using integrated modulator driven by one-port RF signal input without optical filters. As a result, we generated the two-tone signal and the spurious suppression ratio was 27 dB.
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Extinction-Ratio and Chirp Tunable LiNbO3 Single-Drive Modulator for Precise Amplitude Modulation 査読あり
Yuya Yamaguchi, Shinya Nakajima, Atsushi Kanno, Tetsuya Kawanishi, Masayuki Izutsu, Hirochika Nakajima
2014 EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION (ECOC) 2014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 an extinction-ratio and chirp tunable modulator in single-drive operation. Using the modulator, we demonstrated precise amplitude modulation without parasitic phase modulation. Extinction-ratio was larger than 52.2 dB, with low chirp (<vertical bar 0.007 vertical bar) operation.
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Evaluation of Frequency Fluctuation in Fiber-Wireless Link with Direct IQ Down-Converter 査読あり
Atsushi Kanno, Pham Tien Dat, Toshiaki Kuri, Iwao Hosako, Tetsuya Kawanishi, Yuki Yoshida, Ken'ichi Kitayama
2014 EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION (ECOC) 2014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 12-Gbaud QPSK signal transmission in a fiber-wireless link and compare a modulator-based optical two-tone generator and an optical heterodyning with free-running lasers. The obtained frequency fluctuation of the two-tone system meets the requirements of the radio regulations.
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Electro-Optic Devices for Imaging Systems Using Radio-over-Fibre 査読あり
Tetsuya Kawanishi, Naokatsu Yamamoto, Toshimasa Umezawa, Kouichi Akahane, Atsushi Kanno, Pham Tien Dat
2014 16TH INTERNATIONAL CONFERENCE ON TRANSPARENT OPTICAL NETWORKS (ICTON) 2014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
This paper describes high-speed optical modulation and detection devices for radio-over-fibre ( RoF) systems which can distribute millimetre-wave signals over optical fibres with low-loss, and RoF-based high-performance imaging systems which can be used for foreign object debris in runways or railways. High-speed and high-sensitivity photo-detection would be very important to achieve high-resolution imaging. We will share our recent research results on precise lightwave modulation techniques and on high-speed photodetectors using quantum dots.
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Direct Chirp Measurement of Electro Absorption Modulator Using Optical Homodyne Quadrature Demodulation Technique 査読あり
Ukrit Mankong, Tanawat Tangmala, Keizo Inagaki, Atsushi Kanno, Tetsuya Kawanishi
2014 EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION (ECOC) 2014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 method to measure chirp of an electro-absorption modulator 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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DIGITAL SIGNAL PROCESSING TECHNIQUES FOR MULTI-CORE FIBER TRANSMISSION USING SELF-HOMODYNE DETECTION SCHEMES 招待あり 査読あり
Jose Manuel Delgado Mendinueta, Ruben S. Luis, Benjamin J. Puttnam, Jun Sakaguchi, Werner Klaus, Yoshinari Awaji, Naoya Wada, Atsushi Kanno, Tetsuya Kawanishi
2014 PROCEEDINGS OF THE 22ND EUROPEAN SIGNAL PROCESSING CONFERENCE (EUSIPCO) 1880 - 1884 2014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 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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Digital and analog signal transmission technologies based on multi-level modulation and precise lightwave control 査読あり
Tetsuya Kawanishi, Atsushi Kanno
2014 IEEE PHOTONICS CONFERENCE (IPC) 270 - 271 2014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
This presentation shows precise lightwave control and multi-level modulation techniques for analog and digital signal transmission. Digital signal processing can mitigate signal degradation in seamless access communication systems of wired and wireless links
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Development of a 30-GHz high conversion gain analog photoreceiver 査読あり
T. Umezawa, K. Akahane, N. Yamamoto, P. T. Dat, A. Kanno, T. Kawanishi
2014 OPTOELECTRONICS AND COMMUNICATIONS CONFERENCE AND AUSTRALIAN CONFERENCE ON OPTICAL FIBRE TECHNOLOGY (OECC/ACOFT 2014) 245 - 246 2014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 have developed a 30-GHz high conversion gain analog photoreceiver. In the demonstration, a minimum optical input power of as low as -14 dBm at a BER of 10(-3) was achieved for a 1-m long-distance wireless communication.
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De-multiplexer of Wavelength Division Multiplexed Radio-over-Fiber Signal for Application of W-Band Frequency-Modulated ContinuousWave Radar Systems 査読あり
Toshiaki Kuri, Atsushi Kanno, Tetsuya Kawanishi
2014 OPTOELECTRONICS AND COMMUNICATIONS CONFERENCE AND AUSTRALIAN CONFERENCE ON OPTICAL FIBRE TECHNOLOGY (OECC/ACOFT 2014) 126 - 128 2014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
The characteristics of a newly-developed de-multiplexer for wavelength-division-multiplexed (WDM) radio-overfiber (RoF) signal, which is applicable for frequencymodulated continuous-wave (FM-CW) radar systems, is investigated and the de-multiplexing of 4-channel WDM 32-GHz-band FM-CW RoF signal is demonstrated.
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Coherently-Pumped 20Gbaud 16QAM Optical Wavelength Shifting Free of Phase Noise from Pumps 査読あり
Guo-Wei Lu, Andre Albuquerque, Benjamin J. Puttnam, Takahide Sakamoto, Miguel Drummond, Rogerio Nogueira, Atsushi Kanno, Satoshi Shinada, Naoya Wada, Tetsuya Kawanishi
2014 OPTOELECTRONICS AND COMMUNICATIONS CONFERENCE AND AUSTRALIAN CONFERENCE ON OPTICAL FIBRE TECHNOLOGY (OECC/ACOFT 2014) 589 - + 2014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 demonstrate an optical wavelength shifting scheme of 20Gbaud 16QAM based on cascaded 2nd-order nonlinearities in PPLN using coherent pumps, which is free of the phase noise from pumps.
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22.5-GHz-band radio-over-fiber signal transmission over fiber-wireless hybrid link using optical phase-locked loop source 査読あり
Meisaku Suzuki, Atsushi Kanno, Tetsuya Kawanishi, Hideyuki Sotobayashi
2014 INTERNATIONAL TOPICAL MEETING ON MICROWAVE PHOTONICS (MWP) AND THE 2014 9TH ASIA-PACIFIC MICROWAVE PHOTONICS CONFERENCE (APMP) 315 - 317 2014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
3.0-Gb/s signal transmission over a fiber-wireless hybrid link at the 22.5-GHz-band is demonstrated. A frequency-stabilized radio-over-fiber signal is generated using an optical phase-locked-loop driven by a synthesizer using a direct photonic up-conversion technique.
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20-Gbaud QPSK Coherent Radio Transmission at 325 GHz with High-Gain Antennas 査読あり
Atsushi Kanno, Toshiaki Kuri, Isao Morohashi, Iwao Hosako, Tetsuya Kawanishi, Yuki Yoshida, Ken'ichi Kitayama
2014 39TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND TERAHERTZ WAVES (IRMMW-THZ) 2014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
High-speed coherent transmission at 325 GHz is successfully demonstrated with a 20-Gbaud QPSK signal. A frequency-locked terahertz signal can be provided by an optical-modulation-based optical frequency comb signal. A high-gain antenna with a gain of 46 dBi is suitable to extend the transmission distance up to 15 m without requiring a terahertz amplifier.
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1.3-mu m waveband 10-Gbaud quadrature-phase-shift-keying signal transmission over 4-km holey fiber using quantum dot laser 査読あり
Yasuaki Kurata, Akihiro Murano, Kazunari Tomishige, Atsushi Kanno, Naokatsu Yamamoto, Tetsuya Kawanishi, Hideyuki Sotobayashi
2014 OPTOELECTRONICS AND COMMUNICATIONS CONFERENCE AND AUSTRALIAN CONFERENCE ON OPTICAL FIBRE TECHNOLOGY (OECC/ACOFT 2014) 639 - + 2014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
A 1.3-mu m waveband 10-Gbaud photonic transport system transmitting quadrature-phase-shift-keying (QPSK) signals over a 4-km single-mode holey fiber was demonstrated using a newly developed wavelength-tunable quantum dot (QD) laser fabricated through the sandwiched sub-nano separator technique.
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Radio-on-Terahertz Over Fiber System for Future Mobile Fronthauling 査読あり
Atsushi Kanno, Pham Tien Dat, Iwao Hosako, Tetsuya Kawanishi, Hiroyo Ogawa
2014 IEEE GLOBAL COMMUNICATIONS CONFERENCE (GLOBECOM 2014) 2218 - 2222 2014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
The technology of encapsulating a microwave signal into a terahertz carrier and an optical signal is proposed and demonstrated experimentally. Broad bandwidth terahertz radio can encapsulate existing microwave services, including advanced mobile communication signals, by using photonics technology. The concept of radio-on-terahertz-over-fiber helps to realize the future design of mobile fronthaul links. These links will have seamless connectivity between radio and optical networks because of the low latency of the links, which results from the use of analog signal transmission technology.
