Naohide Nagatsu

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The optical path (OP) technology, which employs both wavelength-division multiplexing and wavelength routing, will be the key to enhanced network integrity and an ubiquitous broadband integrated services digital network (B-ISDN) in the future. To construct the OP network, path accommodation design that can solve simultaneously the problems of path routing(More)
1 Grid Technology Research Center, National Institute of Advanced Industrial Science and Technology (AIST), 1-18-13 Soto-Kanda, Chiyoda-Ku, Tokyo 101-0021, Japan +81-3-5298-4724 (Telephone), +81-3-5298-4502 (Fax), atsuko.takefusa@aist.go.jp 2 KDDI R&D Laboratories Inc. 3 NTT Network Innovation Laboratories 4 National Institute of Information and(More)
This paper discusses global area optical transport ring networks using wavelength division multiplexing (WDM) technologies and proposes a novel optical add/drop multiplexer (OADM) architecture suitable for such an application field. Study on the requirements of a global area ring application elucidates the appropriate ring/ protection architecture as the(More)
1. Introduction Recent advances in photonic cross-connect (XC) systems and their associated switch fabrics are remarkable [1], [2]. Some photonic switches are reported to allow for an abundant switching capability beyond 1000×1000 at the optical path (OP) level. However, the rationale for such large-scale switches has not yet been proven from the viewpoint(More)
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