Misc - KANNO Atsushi
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Improvement of Disaster Resiliency and Access Technology of Optical Networks : Accommodation of RoF Signals in the Optical Packet and Circuit Integrated Networks
SHIRAIWA Masaki, XU Sugang, AWAJI Yoshinari, WADA Naoya, MIYAZAWA Takaya, HARAI Hiroaki, KANNO Atsushi, KURI Toshiaki, KAWANISHI Tetsuya
114 ( 287 ) 13 - 18 2014.11
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
To increase the total capacity of radio access networks, the introduction of small-cell architectures will be indispensable. By applying analog radio-over-fiber technologies, equipment at the cell site in the small-cell architecture can be simplified. This enables people to offer enriched daily wireless access services over wide areas in a cost-effective way. In case of large disaster, since the demand for wireless access will be very high after disaster, e.g., for safety-confirmation, victim relief, etc., the cost-effective and high-capacity wireless access networks play a significant role in disaster recovery. We have been investigating the analog radio-over-fiber transmission systems which accommodate radio signals over optical fibers in a robust way. In addition, we have also been investigating other technologies, e.g., multi-vendor optical network interconnection technology, flexible wavelength resource reallocation technology, etc. In this paper, we introduce our studies on the optical network technologies from the perspective of disaster resiliency.
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Optical two-tone signal generation using high extinction-ratio modulator integrated with active Y-branch
YAMAGUCHI Yuya, SEKI Kazuki, KOYANO Hiroyuki, KANNO Atsushi, KAWANISHI Tetsuya, IZUTSU Masayuki, NAKAJIMA Hirochika
114 ( 287 ) 25 - 28 2014.11
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
We demonstrated an optical two-tone signal generation using high extinction-ratio modulator with active Y-branch. By using a high extinction-ratio parallel MZ modulator, we generated a frequency quadruple optical two-tone signal. The spurious suppression ratio of the measured signal was 27dB at lOGHz modulation.
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Numerical Study of Millimeter-Wave Signal Generation using Optical Frequency Locked-Loop and Optical Frequency Comb Technologies
MATSUMOTO Ryo, OBA Jinsei, KANNO Atsushi, KAWANISHI Tetsuya, SOTOBAYASHI Hideyuki
114 ( 287 ) 29 - 32 2014.11
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
To meet the demand of high-speed wireless communications, higher frequency radio such as a millimeter-wave and terahertz wave bands has been attracting attention. For generation of these high-frequency carriers, an optical technology is one of the promising candidates. However, using free-running lasers, resultant frequency fluctuation provided by the beat note between two optical components is a significant issue, hi this paper, we propose suppression technique of the frequency fluctuation generated by free-running lasers using an optical frequency locked loop (OFLL) technique configured with a feed-forward control. In addition, possibility of a millimeter-wave signal generation using an optical frequency comb (OFC) is also discussed.
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Study of high-capacity transmission to high-speed vehicles by radio-over-fiber technologies
KAWANISHI Tetsuya, TIEN DAT Pham, YAMAMOTO Naokatsu, KANNO Atsushi
114 ( 287 ) 33 - 36 2014.11
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
High-speed signal transport technology to high-speed vehicles with a capacity of several Gbit/s is discussed. A key technology is comprised of millimeter-wave radio access technology and radio-over-fiber-based optical network between the millimeter-wave radio access unit and central office. The technology can realize adaptive signal transport to the vehicle with tracking the location of the vehicle by the control information at the central office. It is also discussed with high-speed and high-capacity signal transport without any signal processing such as a media conversion at the radio access unit.
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Invited Talk : R&D Trends of the terahertz technology : Form non-destructive testing to wireless communications
HOSAKO Iwao, SEKINE Norihiko, KANNO Atsushi, KAWANISHI Tetsuya, KASAMATSU Akifumi
IEICE technical report. Electron devices 114 ( 262 ) 39 - 41 2014.10
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
This article reports the recent trends of terahertz technology research and development for a wide variety of applications.
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Development Trend and Activity of Vacuum Electronics in THz Band
YOSHIDA Mitsuru, OKAMOTO Koji, MASUDA Norio, MATSUOKA Junichi, SEKINE Norihiko, KANNO Atsushi, KAWANISHI Tetsuya, Hosako Iwao
IEICE technical report. Electron devices 114 ( 262 ) 43 - 47 2014.10
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
The terahertz wave radiation has been studied in astronomy, analytical science and limited field. The applicability in the various fields expects more industry, medical treatment, biotechnology and security. However, the terahertz region is called the terahertz gap, around the gorge of microwave devices and photonic devices. The device development at this region is made one problem for terahertz technology. Today, We report the development trend and our activity in this region from the side of the vacuum electronics device.
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C-3-5 Linear modulation of optical amplitude using cascade Mach-Zehnder modulators
Koyano Hiroyuki, Seki Kazuki, Yamaguchi Yuya, Kanno Atsushi, Kawanishi Tetsuya, Izutsu Masayuki, Nakajima Hirochika
Proceedings of the Society Conference of IEICE 2014 ( 1 ) 102 - 102 2014.09
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
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C-3-27 Operation Tolerance for High Quality Two-tone Lightwave Generation with Cascaded Mach-Zehnder Modulators
Seki Kazuki, Koyano Hiroyuki, Yamaguchi Yuya, Kanno Atsushi, Kawanishi Tetsuya, Izutsu Masayuki, Nakajima Hirochika
Proceedings of the Society Conference of IEICE 2014 ( 1 ) 124 - 124 2014.09
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
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B-10-43 20 Gbit/s QPSK transmission over 10 km-long holey fiber in 1.3 μm waveband
Yagi Fumiya, Murano Akihiro, Kanno Atsushi, Yamamoto Naokatsu, Akahane Kouichi, Kawanishi Tetsuya, Sotobayashi Hideyuki
Proceedings of the Society Conference of IEICE 2014 ( 2 ) 217 - 217 2014.09
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
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De-multiplexer for Wavelength-Division-Multiplexed W-band Frequency-Modulated Continuous-Wave Signal Distribution Systems
KURI Toshiaki, KANNO Atsushi, KAWANISHI Tetsuya
Technical report of IEICE. OPE 114 ( 142 ) 41 - 46 2014.07
Language：English Publisher：The Institute of Electronics, Information and Communication Engineers
The characteristics of a newly-developed de-multiplexer for wavelength-division-multiplexed (WDM) radio-over-fiber (RoF) signal, which is applicable for frequency-modulated continuous-wave (FM-CW) signal distribution in 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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De-multiplexer for Wavelength-Division-Multiplexed W-band Frequency-Modulated Continuous-Wave Signal Distribution Systems
KURI Toshiaki, KANNO Atsushi, KAWANISHI Tetsuya
IEICE technical report. Microwaves 114 ( 141 ) 41 - 46 2014.07
Language：English Publisher：The Institute of Electronics, Information and Communication Engineers
The characteristics of a newly-developed de-multiplexer for wavelength-division-multiplexed (WDM) radio-over-fiber (RoF) signal, which is applicable for frequency-modulated continuous-wave (FM-CW) signal distribution in 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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Proposals of "Radio over X" and "Modulation-Symbol-Format Maintaining Transmission" for Next Generation Mobile Services
KURI Toshiaki, KANNO Atsushi, KAWANISHI Tetsuya, OGAWA Hiroyo
IEICE technical report. Communication systems 114 ( 119 ) 1 - 6 2014.07
Language：English Publisher：The Institute of Electronics, Information and Communication Engineers
Information data being transmitted must be routed through various physical transmission paths with various physical transmission mediums. Therefore, it seems natural that a radio system is also connected to various other transmission systems. In radio services with a lot of radio access points, such as mobile services, the collaboration of the other transmission system will be unavoidable. In this paper, a basic element common to the purpose of various transmission systems collaborated with radio links on a physical layer, which called "Radio over X (RoX)", is proposed. Then, a new scheme of an efficient transmission on a physical layer, which is called "modulation-symbol-format maintaining transmission", is also proposed. In these proposals, the functional definition of a media conversion is a key. Moreover, as examples of application to next generation mobile services, some experimental demonstrations are shown.
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Performance Evaluation of a Burst-Mode EDFA in a Packetized Radio-over-Fiber Signal Transmission System
SHIRAIWA Masaki, KANNO Atsushi, AWAJI Yoshinari, WADA Naoya, KAWANISHI Tetsuya
114 ( 109 ) 31 - 34 2014.06
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
In order to correspond to drastically increase in mobile data traffic, analog radio-on fiber (RoF) has been studied as a next-generation transmission system. We investigated the performance of a burst-mode erbium-doped fiber amplifier that has high linearity for LTE format packetized RoF signals. We observed a low error vector magnitude value over a wide optical input power range compared with the conventional EDFA.
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Digital Optical Phase-Locked Loop for Signal processing of Radio-over-Fiber signals
SAKAMOTO Takahide, KANNO Atsushi, KURI Toshiaki, YAMAMOTO Naokatsu, KAWANISHI Tetsuya
114 ( 14 ) 51 - 55 2014.04
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
In optical fiber communication systems, demands for real-time coherent detection is rapidly raised. To do that, optical phase-locking technique is required. Digital coherent receiver is a powerful technique for detecting PSK or QAM signals. However, the receiver requires high-speed digital signal processor clocked at the symbol rate or higher rate. As an alternative way, we have demonstrated real-time coherent detection based on digital optical phase-locked loop. Introducing experimental demonstration of high-speed BPSK detection, we discuss how we can apply the DOPLL technology to microwave photonic radio-over fiber systems.
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W-band high-speed and broadband FM-CW signal generation using optical frequency quadrupling technique
KANNO Atsushi, KAWANISHI Tetsuya
114 ( 14 ) 17 - 20 2014.04
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
We configure and demonstrate broadband signal generation at 90-GHz band using optical modulation technologies. The frequency up-chirp signal is applicable for millimeter-wave radar system. Observed degradation of a phase noise is followed by a theoretical estimated value, so the optical frequency quadrupler based on the optical modulation realizes a broadband frequency quadrupler with capability of millimeter-wave signal with resulting frequency-sweep speed of 35 PHz/s. The quadrupler is capable for high precision radar system at the millimeter-wave band.
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C-3-33 Optical Intensity and Phase Changes by Directional Coupler Type Active Y-branch
YAMAGUCHI Yuya, KOYANO Hiroyuki, NAKAJIMA Shinya, KANNO Atsushi, KAWANISHI Tetsuya, IZUTSU Masayuki, NAKAJIMA Hirochika
Proceedings of the IEICE General Conference 2014 ( 1 ) 188 - 188 2014.03
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
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C-14-19 Development of high conversion gain analogue photoreceiver
Umezawa Toshimasa, Akahane Kouichi, Yamamoto Naokatsu, Dat Pham Tien, Kanno Atsushi, Kawanishi Tetsuya
Proceedings of the IEICE General Conference 2014 ( 1 ) 289 - 289 2014.03
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
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C-3-20 Low Driving Voltage LiNbO_3 Optical Modulator using Phase Matching by Folded Structure
IIMURA Tetsuhito, NAKAJIMA Shinya, KANNO Atsushi, KAWANISHI Tetsuya, NAKAJIMA Hirochika, IZUTSU Masayuki
Proceedings of the IEICE General Conference 2014 ( 1 ) 175 - 175 2014.03
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
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C-3-21 Improvement of the Suppression of the Optical Harmonic by Optical SSB-SC Modulation with Third-order Harmonic
NAKAO Ryota, YAMAGUCHI Yuya, KANNO Atsushi, KAWANISHI Tetsuya, IZUTSU Masayuki, NAKAJIMA Hirochika
Proceedings of the IEICE General Conference 2014 ( 1 ) 176 - 176 2014.03
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
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B-10-26 Homodyne detection experiment of QPSK signals using a Quantum dot laser diode at the 1.3-μm wavelength region
Kurata Yasuaki, Tomishige Kazunari, Kanno Atsushi, Yamamoto Naokatsu, Akahane Kouichi, Kawanishi Tetsuya, Sotobayashi Hiduyuki
Proceedings of the IEICE General Conference 2014 ( 2 ) 394 - 394 2014.03
Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers
