Summary of Research Project Results Under the JSPS FY2000
"Research for the future Program"



1.Research Institution The University of Tokyo
 
2.Research Area Physical and Engineering Science
 
3.Research Field Advanced Multimedia Information and Communication Systems
 
4.Term of Project FY1996〜FY2000
 
5.Project Number 96P00601
 
6.Title of Project Post ATM Advanced Telecommunication Network Architecture

7.Projetct Leader
Name Institution,Department Title of Position
Tadao Saito Graduate School of Engineering Professor

8.Core Members

Names Institution,Department Title of Position
Hiroshi Harashima Graduate School of Engineering, The University of Tokyo Professor
Kazuro Kikuchi Research Center for Advanced Science and Technology, The University of Tokyo Professor

9.Cooperating Researchers

Names Institution,Department Title of Position
Tomonori Aoyama Graduate School of Engineering, The University of Tokyo Professor
Hiroshi Yasuda Research Center for Advanced Science and Technology, The University of Tokyo Professor
Hitoshi Aida Graduate School of Frontior Sciences, The University of Tokyo Professor

10.Summary of Research Results

To realize broadband telecommunications network, all the components in the network must cooperate based on an identical principle. Since technology changes rapidly, an architecture is needed which permits wide variety of new technologies to cooperate. In the present project, to realize the architecture, advanced new knowledge were obtained in high capacity transmission, switch/nodes and broadband terminal equipment.
In the future backbone network, optical-time-division multiplexing (OTDM) and wavelength-division multiplexing (WDM) technologies will play an important role in order to realize over Tera bit/s transmission capacity. In this project, we developed novel OTDM/WDM transmitter using super-continuum generation from optical fibers. We also proposed and demonstrated several ultra-fast optical transmission schemes that were based on compensation for group-velocity dispersion of optical fibers. An optical cross-connect switch, where WDM channels were routed by tunable optical fiber Bragg gratings, was constructed for the first time, and basic characteristics were examined.
In the access technology we studied novel schemes to combine optical and wireless communication technologies effectively. We proposed and demonstrated new techniques to generate, process, and transmit mm-wave electromagnetic waves through optical fibers.
In switch and node technology study, new switch architecture for IP (Internet Protocol) router and video specific switch is examined to achieve capacity of multi Tera bit/sec.
In IP node study, quasi-variable length packet batcher banyan switch, down-loop switch, ring banyan switch, and ring shuffles switch are proposed for a method of switch fabric of IP router. The feasibility of switch configuration is confirmed by basic LVSI design to achieve Tera bit/sec. For a method of switch fabric of video switch, a variable bit are TDM switch architecture is proposed to sausty this demand.
In broadband terminal study, novel image representation and production based on multiple images have been investigated. The work is categorized into two topics (1) image representation and visual effect generation by using multiple differently focused images, and (2) wide view, high resolution image generation by using multiple (many) images. A new camera system for the new image generation scheme has been also developed.
In general, real images, which are captured even by HDTV cameras, have not enough resolution for the Immersive Projection Technologies (IPT). In order to solve this problem, we proposed two methods shared space communications based on real images suitable for IPT systems i.e. Multi-Resolution Stereoscopic Communication Using a Set of Four Cameras and Image-Based Immersive Walkthrough Using High-Resolution Panoramic Images. (end)

11.Key Words

(1)Broadband network、(2)WDM、(3)all optical switch
(4)optical wireless communication、(5)Tera bit router、(6)VTDM switch
(7)large screen image、(8)high definition image、(9)High-resolution panoramic image

12.References

[Reference Articles]
Author Title of Article
Han Chuen Lim, T. Sakamoto, and K. Kikuchi Polarization-independent optical demultiplexing by conventional nonlinear optical loop mirror in a polarization-diversity loop configuration
Journal Volume Year Pages Concerned
IEEE Photonics Technology Letter. Vol.12 No.12 2000 1704-1706

Author Title of Article
T. Kamiya, M. Tsuchiya, M. Miyamoto, J. Lee, T. Tanaka, and S. Sasaki New approach of semiconductor laser related technologies for ultrafast photonics
Journal Volume Year Pages Concerned
Optical and Quantum Electronics Vol.32 2000 443-435

Author Title of Article
Tadao Saito, Hitoshi Aida, Terumasa Aoki, Norihisa Nishimura and Kenichi Shinbo A High-capacity Switching Method for IP Datagrams with Multistage Networks
Journal Volume Year Pages Concerned
IEICE Transactions Vol.J83-B,No.11 2000 1545-1553

Author Title of Article
Hiroaki Morino, Udomukiat Bunworasate, Hitoshi Aida, and Tadao Saito A Control for Video Traffic with Minimum Bandwidth Guarantee Function Using Variable Bit Rate TDM Switch Architecture
Journal Volume Year Pages Concerned
IEICE Transactions Vol.J83-B,No.12 2000 1767-1775

Author Title of Article
T. Naemura, T. Yoshida and H. Harashima 3-D computer graphics based on integral photography
Journal Volume Year Pages Concerned
Optics Express Vol.8,No.4 2000 255-262

Author Title of Article
F. Futami, K. Taira, K. Kikuchi, and A. Suzuki Wideband fibre dispersion equalisation up to fourth-order for long-distance sub-picosecond optical pulse transmission
Journal Volume Year Pages Concerned
Electronics. Letter Vol.35 No.25 1999 2221-2223

Author Title of Article
Han Chuen Lim, F. Futami, K. Taira, and K. Kikuchi Broad-band mid-span spectral inversion without wavelength shift of 1.7-ps optical pulses using a highly nonlinear fiber Sagnac interferometer
Journal Volume Year Pages Concerned
IEEE Photonics Technology Letter Vol.11 No.11 1999 1405-1407

Author Title of Article
M. Tsuchiya and T. Hoshida Nonlinear photodetection scheme and its system applications to fiber-optic millimeter-wave wireless down-links
Journal Volume Year Pages Concerned
Special Issue of the IEEE Transactions on Microwave Theory and Techniques on Microwave and Millimeter-wave Photonics Vol.47 No.7 1999 1342-1350

Author Title of Article
R. Yatsu, K. Taira and M. Tsuchiya High quality sub-100 fs optical pulse generation by fiber-optic soliton compression of gain-switched distributed-feedback laser-diode pulses in conjunction with nonlinear optical fiber loops
Journal Volume Year Pages Concerned
Optics Letters Vol.24,No.16 1999 1172-1174

Author Title of Article
Y. Takushima, F. Futami, and K. Kikuchi Generation of over 140-nm-wide super-continuum from a normal dispersion fiber by using a mode-locked semiconductor laser source
Journal Volume Year Pages Concerned
IEEE Photonics Technology. Letter Vol.10,No.11 1998 1560-1562

Author Title of Article
F. Futami, Y. Takushima, and K. Kikuchi Generation of 10 GHz, 200 fs Fourier-transform-limited optical pulse train from modelocked semiconductor laser at 1.55 μm by pulse compression using dispersion-flattened fibre with normal group-velocity dispersion
Journal Volume Year Pages Concerned
Electronics Letter Vol.34,No.22 1998 2129-2130

Author Title of Article
T. Akiyama, M. Tsuchiya and T. Kamiya Sub-pJ operation of broadband asymmetric Fabry-perot all-optical gate with coupled cavity structure
Journal Volume Year Pages Concerned
Applied Physics Letter Vol.72,No.13 1998 1545-1547

Author Title of Article
T. Hoshida and M. Tsuchiya Broadband Millimeter-Wave Upconversion by Nonlinear Photo-detection Usinga a Waveguide p-I-n Photodiode
Journal Volume Year Pages Concerned
IEEE Photonics Technology Letters Vol.10,No.6 1998 860-862

Author Title of Article
T. Naemura, M. Kaneko and H. Harashima Orthographic Approach to Representing 3-D Images and Interpolating Light Rays for 3-D Image Communication and Virtual Environment Signal Process,
Journal Volume Year Pages Concerned
Image Communications Vol.14 1998 21-37

Author Title of Article
F. Futami and K. Kikuchi Generation of 113-GHz, 1.8-ps optical pulse trains by Fourier synthesis of four-wave mixing signals obtained from semiconductor optical amplifiers
Journal Volume Year Pages Concerned
Optics Letter Vol.22,No.24 1997 1873-1875

Author Title of Article
C. Lorattanasane and K. Kikuchi Parametric instability of optical-amplifier noise in long-distance optical transmission systems
Journal Volume Year Pages Concerned
IEEE Journal on Quantum Electronics Vol.33,No.7 1997 1068-1074

Author Title of Article
M. Tsuchiya, M. Koch, J. Shah, T. C. Damen, W. Y. Jan and J. E. Cunningham THz oscillations in the emission from a semiconductor microcavity
Journal Volume Year Pages Concerned
Applied Physics Letter Vol.71,No.9 1997 1240-1242

Author Title of Article
M. Tsuchiya, J. Shah, T. C. Damen and J. E. Cunningham Nondegenerate Four-Wave Mixing in a Semiconductor Microcavity
Journal Volume Year Pages Concerned
Applied Physics Letter Vol.71,No.18 1997 2650-2652

Author Title of Article
Hiroaki Morino, Tadao Saito, Hitoshi Aida, and Junichi Takahashi Effective Video Transmission System Using Fast Bandwidth Reservation Protocol for ATM Networks
Journal Volume Year Pages Concerned
IEICE Transactions Vol.J80-B-I,No.10 1997 735-741


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