|
For Full-Text PDF, please login, if you are a member of IEICE,
or go to Pay Per View on menu list, if you are a nonmember of IEICE.
|
A Demonstration of an Optical Switch Circuit with "Bridge and Switch" Function in WDM Four-Fiber Ring Networks
Tetsuya MIYAZAKI Toshio KATO Shu YAMAMOTO
Publication
IEICE TRANSACTIONS on Communications
Vol.E82-B
No.2
pp.326-334 Publication Date: 1999/02/25 Online ISSN:
DOI: Print ISSN: 0916-8516 Type of Manuscript: Special Section PAPER (Joint Special Issue on Photonics in Switching: Systems and Devices) Category: Circuit Switching and Cross-Connecting Keyword: optical switch, optical ADM, WDM, four-fiber-ring networks,
Full Text: PDF>>
Summary:
We propose and demonstrate for the first time in our knowledge, an optical switch circuit architecture furnishing with the "Bridge and Switch" function, conforming to ITUT-T Recommendation G. 841 Annex A for optical Add-Drop Multiplexers (ADMs) in WDM four-fiber ring networks. This function enables optical ADMs to revert automatically from the switching state to their idle state just after the recovery of failure, that is indispensable for the extra traffic accommodation to enhance efficiency of the network operation. We have developed the optical ADM nodes employing the proposed optical switch circuit for each wavelength, arrayed-waveguide gratings (AWGs) and Er-doped fiber amplifiers. In the demonstration, transmission characteristics of the cascaded optical ADM nodes without regenerative repeaters have been verified at first. We have confirmed the ring protection and the automatic protection switching (APS) sequence which includes the automatic reversion in the optical ADM nodes with proposed optical switch circuits.
|
|