論文 - 菅野 敦史
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120-Gb/s NRZ-DQPSK signal generation by a thin-lithium-niobate- substrate modulator 査読あり
Atsushi Kanno, Takahide Sakamoto, Akito Chiba, Tetsuya Kawanishi, Kaoru Higuma, Masaaki Sudou, Junichiro Ichikawa
IEICE ELECTRONICS EXPRESS 7 ( 11 ) 817 - 822 2010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：IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG
A high-speed DQPSK optical modulator is fabricated with a thin lithium niobate substrate. Decrease in the propagation loss of electrodes and a low half-wave voltage, which can be realized by fabrication of a ridge-type optical waveguide structure, can help achieve 120-Gb/s (60-Gbaud) NRZ-DQPSK modulation with full electrical-time-division-multiplexing technique.
DOI： 10.1587/elex.7.817
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Real-time visualization of electromagnetic waves propagating in air using live electro-optic imaging technique 査読あり
Atsushi Kanno, Kiyotaka Sasagawa, Takahiro Shiozawa, Masahiro Tsuchiya
OPTICS EXPRESS 18 ( 10 ) 10029 - 10035 2010年05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
Electromagnetic waves propagating in air are visually observed with phase evolution in real time by live electro-optic imaging technique. We show how geometrical and crystallographic arrangements of an electro-optic sensor plate enable the realization of the real-time visual observation of traveling 100-GHz electromagnetic waves. For this purpose, a generation technique for a 100-GHz optical local oscillator signal at 780 nm was newly developed, whose optical wavelength is suitable for the ultra-parallel RF electric field data acquisition by a Si-CMOS image sensor. (C)2010 Optical Society of America
DOI： 10.1364/OE.18.010029
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Real-time visualization of electromagnetic waves propagating in air using live electro-optic imaging technique 査読あり
Atsushi Kanno, Kiyotaka Sasagawa, Takahiro Shiozawa, Masahiro Tsuchiya
OPTICS EXPRESS 18 ( 10 ) 10029 - 10035 2010年05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
Electromagnetic waves propagating in air are visually observed with phase evolution in real time by live electro-optic imaging technique. We show how geometrical and crystallographic arrangements of an electro-optic sensor plate enable the realization of the real-time visual observation of traveling 100-GHz electromagnetic waves. For this purpose, a generation technique for a 100-GHz optical local oscillator signal at 780 nm was newly developed, whose optical wavelength is suitable for the ultra-parallel RF electric field data acquisition by a Si-CMOS image sensor. (C)2010 Optical Society of America
DOI： 10.1364/OE.18.010029
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Digital Optical Costas Loop for Coherent Demodulation of 10-Gb/s BPSK 査読あり
Takahide Sakamoto, Akito Chiba, Atsushi Kanno, Tetsuya Kawanishi
2010 15TH OPTOELECTRONICS AND COMMUNICATIONS CONFERENCE (OECC) 766 - 767 2010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：IEICE-INST ELECTRONICS INFORMATION & COMMUNICATION ENGINEERS
We demonstrate a digital optical Costas loop for real-time demodulation of a high-speed BPSK signal. The optical carrier is recovered by a DSP with high-bandwidth sampling at the frontend. A 10-Gb/s BPSK signal is demodulated.
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95-Gb/s NRZ-DPSK Modulation with Full-ETDM Technique 査読あり
Atsushi Kanno, Takahide Sakamoto, Akito Chiba, Tetsuya Kawanishi, Masaaki Sudo, Kaoru Higuma, Junichiro Ichikawa
2010 36TH EUROPEAN CONFERENCE AND EXHIBITION ON OPTICAL COMMUNICATION (ECOC), VOLS 1 AND 2 2010 ( 1 ) Mo.2.F.5, pp.1-2 2010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 95-Gb/s NRZ-DPSK modulation by using high-speed modulator and full-ETDM technique. The BER performance under a back-to-back condition is achieved to be 7.1 x 10 (4) at 95 Gb/s.
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40Gb/s DP- NRZ-QPSK Signal Generation using a Dual-Polarization Quad-Parallel Mach-Zehnder Modulator 査読あり
Masaaki Sudo, Takahide Sakamoto, Isao Morohashi, Atsushi Kanno, Akito Chiba, Tetsuya Kawanishi, Junichiro Ichikawa
2010 15TH OPTOELECTRONICS AND COMMUNICATIONS CONFERENCE (OECC) 456 - + 2010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：IEICE-INST ELECTRONICS INFORMATION & COMMUNICATION ENGINEERS
We demonstrated a 40Gb/s DP-NRZ-QPSK signal generation using a dual-polarization quad-parallel MZ modulator fabricated on LiNbO3. Two orthogonally polarized QPSK signals were successfully demodulated by digital homodyne receiver.
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360-Gb/s NRZ-DP-DQPSK modulation with full-ETDM technique 査読あり
Atsushi Kanno, Takahide Sakamoto, Akito Chiba, Tetsuya Kawanishi, Masaaki Sudou, Kaoru Higuma, Junichiro Ichikawa
2010 15TH OPTOELECTRONICS AND COMMUNICATIONS CONFERENCE (OECC) 454 - + 2010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：IEICE-INST ELECTRONICS INFORMATION & COMMUNICATION ENGINEERS
360-Gb/s (90-Gbaud) NRZ-DP-DQPSK modulation with full-ETDM technique is demonstrated by using a high-speed LiNbO3 optical modulator. The modulator with a ridge-type optical waveguide structure on a thin substrate helps realize high symbol-rate modulation.
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166 Gb/s PDM-NRZ-DPSK modulation using thin-LiNbO3-substrate modulator 査読あり
Atsushi Kanno, Takahide Sakamoto, Akito Chiba, Tetsuya Kawanishi, Kaoru Higuma, Masaaki Sudo, Junichiro Ichikawa
2010 CONFERENCE ON OPTICAL FIBER COMMUNICATION OFC COLLOCATED NATIONAL FIBER OPTIC ENGINEERS CONFERENCE OFC-NFOEC 2010 ( 1 ) 1 - 3 2010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 modulation of a 166-Gb/s PDM-NRZ-DPSK signal is demonstrated using a thin-LiNbO3-substrate modulator. The use of a 0.1-mm-thick substrate and a ridge-type waveguide improves the optical response and brings about a reduction in V pi. (C) 2009 Optical Society of America
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160-Gb/s NRZ-DQPSK signal generation using a thin-LiNbO3-substrate modulator with a ridge-type optical waveguide structure 査読あり
Atsushi Kanno, Takahide Sakamoto, Akito Chiba, Tetsuya Kawanishi, Kaoru Higuma, Masaaki Sudo, Junichiro Ichikawa
2010 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) AND QUANTUM ELECTRONICS AND LASER SCIENCE CONFERENCE (QELS) 2010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
160-Gb/s NRZ-DQPSK modulation is demonstrated with a thin-LiNbO3-substrate modulator. Using this substrate with a ridge-type waveguide structure can help realize an extension of a bandwidth and a decrease of a half-wave voltage of the modulator. (C) 2009 Optical Society of America
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16 Quadrature Amplitude Modulation Using Polarization-Multiplexing QPSK Modulator 査読あり
Isao Morohashi, Masaaki Sudo, Takahide Sakamoto, Atsushi Kanno, Akito Chiba, Junichiro Ichikawa, Tetsuya Kawanishi, Iwao Hosako
2010 15TH OPTOELECTRONICS AND COMMUNICATIONS CONFERENCE (OECC) 446 - + 2010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：IEICE-INST ELECTRONICS INFORMATION & COMMUNICATION ENGINEERS
We demonstrated 16 QAM using a quad-parallel Mach-Zehnder modulator with polarization-multiplexing. This modulator generates two QPSK signals with orthogonal polarization. 16 QAM is synthesized from the QPSK signals by using a polarizer.
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16 QAM Synthesis by Angular Superposition of Polarization using Dual-Polarization QPSK Modulator 査読あり
Isao Morohashi, Masaaki Sudo, Takahide Sakamoto, Atsushi Kanno, Akito Chiba, Junichiro Ichikawa, Tetsuya Kawanishi
2010 36TH EUROPEAN CONFERENCE AND EXHIBITION ON OPTICAL COMMUNICATION (ECOC), VOLS 1 AND 2 2010 ( 1 ) P3.14, pp. 1-2 2010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 polarization-multiplexing QPSK modulator for 16 QAM generation. 16 QAM is synthesized from two QPSK signals with orthogonal polarization by a polarizer. Generation of 40 Gb/s 16 QAM with the BER of 8.13x10(-6) was demonstrated.
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12.8-GHz-bandwidth frequency chirp signal generation with high-extinction-ratio optical modulator by optical frequency doubling technique 査読あり
Atsushi Kanno, Tetsuya Kawanishi, Shinnosuke Honda, Hideyuki Sotobayashi
Proceedings - 2010 IEEE International Topical Meeting on Microwave Photonics, MWP 2010 283 - 285 2010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 successfully demonstrated ultra-wideband frequency chirp signal generation using the DSB-SC modulation technique with pulse duration of 0.5 μs. A high extinction ratio optical modulator helps realize clear signals with no filters. ©2010 IEEE.
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Real-Time Homodyne Reception of 40-Gb/s BPSK Signal by Digital Optical Phase-Locked Loop 査読あり
Takahide Sakamoto, Akito Chiba, Atsushi Kanno, Isao Morohashi, Tetsuya Kawanishi
2010 36TH EUROPEAN CONFERENCE AND EXHIBITION ON OPTICAL COMMUNICATION (ECOC), VOLS 1 AND 2 2010 ( 1 ) P3.12, pp. 1-2 2010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 real-time homodyne demodulation of a 40-Gb/s BPSK signal by using novel digital optical phase-locked loop with a Costas-loop structure. The optical carrier is locally recovered in the receiver side with a slow-speed digital signal processor employing bandwidth-enhanced samplers.
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Spurious free frequency doubler using a dual-parallel optical Mach-Zehnder modulator 査読あり
Tetsuya Kawanishi, Keizo Inagaki, Atsushi Kanno, Hitoshi Kiuchi
2010 23RD ANNUAL MEETING OF THE IEEE PHOTONICS SOCIETY 191 - + 2010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 photonic-based signal generation technique using a dual parallel Mach-Zehnder modulator. Frequency doubled components without spurious can be generated at a photodetector. This technique is useful for measurement of photodetector nonlinearity.
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Image Observations and Analyses of RF Wave Propagations on the Basis of LEI Camera 査読あり
T. Shiozawa, A. Kanno, K. Sasagawa, M. Tsuchiya
PIERS 2010 XI'AN: PROGRESS IN ELECTROMAGNETICS RESEARCH SYMPOSIUM PROCEEDINGS, VOLS 1 AND 2 769 - + 2010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 ACAD
We overview the recent progress of the novel experimental imaging scheme to intuitively analyze RF signal wave propagations. The scheme is based on a live-electrooptic-imaging camera (LEI camera; http://lei-camera.nict.go.jp/), which was invented and originally prototyped by NICT, and it involves the real-time visualization of phase evolution in RF wave electric fields. The scheme was demonstrated to be effective for determining the immediate essence of RF wave propagations.
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Spurious free frequency doubler using a dual-parallel optical Mach-Zehnder modulator 査読あり
Tetsuya Kawanishi, Keizo Inagaki, Atsushi Kanno, Hitoshi Kiuchi
2010 23RD ANNUAL MEETING OF THE IEEE PHOTONICS SOCIETY 191 - + 2010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 photonic-based signal generation technique using a dual parallel Mach-Zehnder modulator. Frequency doubled components without spurious can be generated at a photodetector. This technique is useful for measurement of photodetector nonlinearity.
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Real-Time Homodyne Reception of 40-Gb/s BPSK Signal by Digital Optical Phase-Locked Loop 査読あり
Takahide Sakamoto, Akito Chiba, Atsushi Kanno, Isao Morohashi, Tetsuya Kawanishi
2010 36TH EUROPEAN CONFERENCE AND EXHIBITION ON OPTICAL COMMUNICATION (ECOC), VOLS 1 AND 2 2010 ( 1 ) P3.12, pp. 1-2 2010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 real-time homodyne demodulation of a 40-Gb/s BPSK signal by using novel digital optical phase-locked loop with a Costas-loop structure. The optical carrier is locally recovered in the receiver side with a slow-speed digital signal processor employing bandwidth-enhanced samplers.
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Image and/or Movie Analyses of 100-GHz Traveling Waves on the Basis of Real-Time Observation With a Live Electrooptic Imaging Camera
Masahiro Tsuchiya, Atsushi Kanno, Kiyotaka Sasagawa, Takahiro Shiozawa
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES 57 ( 12 ) 3373 - 3379 2009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：IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
A 100-GHz-class live electrooptic imaging camera (LEI-camera), a novel microwave and millimeter-wave instrument, has been implemented for a scheme of W-band wave analyses. The first real-time visualization of W-band waves as phase-resolved images and phase-evolving movies has been successfully demonstrated, and the relevant images and/or movies obtained have been applied to the analyses of 100-GHz traveling waves. In conjunction with complementary numerical simulation approaches, studies have been conducted on a mode interaction between a ZnTe slab waveguide and a free space as well as on the loss tangent effect on W-band wave propagations. On the basis of the observed images and/or movies with live electrooptic imaging camera, some interesting analytical results have been obtained.
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Real-time digital signal processing for live electro-optic imaging 査読あり
Kiyotaka Sasagawa, Atsushi Kanno, Masahiro Tsuchiya
OPTICS EXPRESS 17 ( 18 ) 15641 - 15651 2009年08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 present an imaging system that enables real-time magnitude and phase detection of modulated signals and its application to a Live Electro-optic Imaging (LEI) system, which realizes instantaneous visualization of RF electric fields. The real-time acquisition of magnitude and phase images of a modulated optical signal at 5 kHz is demonstrated by imaging with a Si-based high-speed CMOS image sensor and real-time signal processing with a digital signal processor. In the LEI system, RF electric fields are probed with light via an electro-optic crystal plate and downconverted to an intermediate frequency by parallel optical heterodyning, which can be detected with the image sensor. The artifacts caused by the optics and the image sensor characteristics are corrected by image processing. As examples, we demonstrate real-time visualization of electric fields from RF circuits. (C) 2009 Optical Society of America
DOI： 10.1364/OE.17.015641
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Real-time digital signal processing for live electro-optic imaging 査読あり
Kiyotaka Sasagawa, Atsushi Kanno, Masahiro Tsuchiya
OPTICS EXPRESS 17 ( 18 ) 15641 - 15651 2009年08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 present an imaging system that enables real-time magnitude and phase detection of modulated signals and its application to a Live Electro-optic Imaging (LEI) system, which realizes instantaneous visualization of RF electric fields. The real-time acquisition of magnitude and phase images of a modulated optical signal at 5 kHz is demonstrated by imaging with a Si-based high-speed CMOS image sensor and real-time signal processing with a digital signal processor. In the LEI system, RF electric fields are probed with light via an electro-optic crystal plate and downconverted to an intermediate frequency by parallel optical heterodyning, which can be detected with the image sensor. The artifacts caused by the optics and the image sensor characteristics are corrected by image processing. As examples, we demonstrate real-time visualization of electric fields from RF circuits. (C) 2009 Optical Society of America
DOI： 10.1364/OE.17.015641
