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Research paper−108−Synthesiology - English edition Vol.4 No.2 pp.108-118 (Oct. 2011) advanced communication services. It will be explained in the following chapter.In August 2010, we conducted a demonstration experiment of the network that allows transmission of high-capacity information as typified by super HD videos on demand, by combining the elemental technologies for optical communication that were newly developed by AIST and five information technology companies. This enabled a proposal of the new network technology that overcomes the limitations of power consumption and communication capacity of the devices that configure the current network. In this paper, we describe the process of the technological considerations for synthesizing the individual elemental technologies and obtaining the functioning results. 2 Social demand for optical networkIt is well known that the communication traffic on the Internet is increasing at the rate of 30~40 % every year in Japan. Assuming that this trend continues for about 20 years, the traffic will be about 1,000 times higher. This calls for the improvement of power efficiency. The number of Japanese Internet users surpassed 94 million people at the end of 2009, and the penetration rate is 78 %[1]. The technological background is that the performances of the communication equipment and PDAs have improved, well-developed 1 IntroductionWith the background of increased demand in communication mainly for the Internet, energy savings in optical communication is an immediate issue. The most important topic of communication system R&D fields today is to devise a network configuration that allows the viewers to obtain high-capacity information such as super high-definition (HD) images at home at their convenience, while maintaining low power consumption in the communication devices. Whenever a demand is made, the optical fiber path quickly switches to link the home and the information source to allow delivery of all sorts of information services. Such optically transparent network, where the home and the information source are connected by optical fiber only, is ideal because the communication bandwidth can be maximized to its theoretical limit without increasing the energy. This can then be used in various application technologies and services such as education, welfare, or medical care that employ super HD image transmission. Nowadays, the services based on the communication technology are handling large volumes of data, thus, high-speed data communication has become necessary. The optical fiber communication technology has a capability of handling such high-capacity data transmission, and it has become the foundation of the Internet and the advanced information society. On the other hand, there is a major problem in the sustainable development of such - Proof-of-concept experiment of image distribution over the dynamic optical path network-In order to overcome the limitation of low-power-consumption and communication capacity of the equipment forming the present communication network, National Institute of Advanced Industrial Science and Technology (AIST) has carried out a demonstration of a new prototype optical path network to support the super HD large-capacity image contents era, in collaboration with five IT- related companies and with the support of National Institute of Information and Communications Technology (NICT) and Nippon Hoso Kyokai Science and Technology Research Laboratories (NHK/STRL) . The experiment was a trial to demonstrate the performance of the dynamic optical path network developed mainly by AIST under practical conditions, using a network testbed of field optical fiber links connecting Akihabara, Otemachi and Koganei offices in Tokyo. The demonstration included the cross-border-connection with the optical packet and circuit integrated network realized by NICT and transmission of super HD video signals developed by NHK. In this paper, we describe the objectives, targets, technology syntheses based on the elemental technologies for the demonstration, and outcomes.Demonstration of optical communication network for ultra high-definition image transmission Keywords : Optical path network, optical packet and circuit integrated network, JGN2plus, distribution of high-quality images, super high vision (SHV)[Translation from Synthesiology, Vol.4, No.2, p.100-110 (2011)]Junya Kurumida*and Shu NamikiNetwork Photonics Research Center, AIST Tsukuba Central 2, 1-1-1 Umezono, Tsukuba 305-8568, Japan*E-mail : Original manuscript received February 7, 2011, Revisions received March 31, 2011, Accepted April 6, 2011

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