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Experimental Optical Fiber Digital Transmission Systems

Tetsuya MIKI, Kiyoshi NAKAGAWA, Masaki KOYAMA, Hideki ISHIO

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Summary :

An initial trial of the optical fiber transmission system in NTT is reported in this paper. In NTT's transmission networks, the shorthaul application appears attractive in the near future. The laboratory test is primarily targeted to 32 Mb/s bit rate and 8 km long repeater spacing. We report here the design philosophy of step-index multimode fibers and repeaters for this trial. Through the design and manufacturing of fibers, the fundamental and common characteristics of fibers are clarified. Stable, compact and low power consuming optical repeaters are realized. Trere is no trouble of optical repeatered line and all repeaters in the line are operating with sufficient optical power margin. Multi-repeatered test has confirmed that experimental results are in good agreement with the design values.

Publication
IEICE TRANSACTIONS on transactions Vol.E61-E No.3 pp.229-234
Publication Date
1978/03/25
Publicized
Online ISSN
DOI
Type of Manuscript
Special Section PAPER (Special Issue on Integrated Optics and Optical Fiber Communications)
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