Bidirectional optical networks

Details Bidirectional optical networks Bidirectional optical networks

2006-05-09

2006-05-09

Sedighian, M. R. (Department: 2633)

Optical communications

Multiplex

Wavelength division or frequency division

C398S059000, C398S067000, C398S085000

Reexamination Certificate

active

07043159

ABSTRACT:
A wavelength division multiplexed (WDM) apparatus is provided for a bidirectional dense WDM optical fiber communication network with cost-effective and efficient allocation of the resources available at each network node. For each fiber link, the invention uses a WDM signal composed of channels propagating in opposite directions and a band optical add-drop multiplexer (OADM) to isolate or combine a band to the WDM signal spectrum. As a result, the invention significantly reduces the number fiber connections and filtering equipment required with respect to each direction of transmission.

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Hitoshi Obara et al. (NTT Optical Network Systems Laboratories, 1-1, Hikari-no-oka, Yokosuka, Kanagawa, 238-03 Japan, Transmission over a 200-km single-fiber bidirectional ring network with reconfigurable WDM Add/Drop repeaters).

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