Bi-directional optical transmission using dual channel bands

Details Bi-directional optical transmission using dual channel bands Bi-directional optical transmission using dual channel bands

2005-12-06

2005-12-06

Phan, Hanh (Department: 2638)

Optical communications

Duplex

Wavelength division

C398S041000, C398S079000, C398S091000, C398S082000, C398S087000, C398S135000, C398S138000, C398S140000, C398S141000, C359S337100, C359S337400, C359S341430, C359S349000, C385S024000, C385S037000

Reexamination Certificate

active

06973268

ABSTRACT:
A bi-directional optical transmission system according to the present invention provides transport of x optical channels over n nodes. The system supports two-way transport of the x channels over a single fiber connecting each of the nodes in sequence. The system is advantageous in that only two optical transmission bands are utilized in order to achieve minimal loss in the separation of bands. The use of only two bands permits the utilization of low-loss wide band thin film optical filters to combine and separate the signals at each node. A reflection port of this filter is used to carry oppositely directed signals of the second band from the bi-directional fiber to an optical amplifier for the second band. An alternate arrangement of the optical filters in the two separate bands is chosen to maximize the optical performance of the overall system and significantly reduce insertion losses.

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