Optical: systems and elements – Optical amplifier – Optical fiber
Patent
1996-06-14
1998-09-22
Moskowitz, Nelson
Optical: systems and elements
Optical amplifier
Optical fiber
359143, H01S 300, H04B 1016, H04J 1402
Patent
active
058123067
ABSTRACT:
The present invention provides a bidirectional WDM optical communication system with bidirectional optical amplifiers for optically amplifying two counter-propagating WDM optical signals. The bidirectional system includes two sets of optical transmitters for respectively creating a set of west-east optical channels and a set of counter-propagating east-west optical channels. The respective channel sets are multiplexed by optical combiners and output to an optical transmission path. A bidirectional optical amplifier positioned in the optical transmission path amplifies the west-east and east-west WDM signals. In an exemplary embodiment, the amplifier includes at least two optical circulators with at least first, second, and third circulating ports. A gain block interconnects the circulators for optically amplifying the WDM signals. Bragg gratings configured to reflect either the west-east or the east-west channel band are positioned in optical paths which optically communicate with the optical circulators. The bidirectional WDM optical system further includes two receiving systems for demultiplexing the WDM signals and routing the individual optical channels to their respective receivers.
REFERENCES:
patent: 5280549 (1994-01-01), Barnard et al.
patent: 5479082 (1995-12-01), Calvani et al.
patent: 5500763 (1996-03-01), Ota
patent: 5532864 (1996-07-01), Alexander et al.
patent: 5557442 (1996-09-01), Huber
patent: 5563733 (1996-10-01), Mitsuda et al.
patent: 5633741 (1997-05-01), Giles
patent: 5638473 (1997-06-01), Byron
patent: 5652675 (1997-07-01), Shibuya
Chawbi et al, 21st Eurgren Conf. on Opt. Commun., vol. 1, pp. 47-50, Sep. 21, 1995; abst. only herewith.
Barnard et al, IEEE Photonics Tech. Lett., vol. 4, No. 8, Aug. 1992, pp. 911-913; abst. only herewith.
Burke Margaret
Ciena Corporation
Daisak Daniel N.
Moskowitz Nelson
LandOfFree
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