Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1995-07-25
1996-09-17
Pascal, Leslie
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359124, 359127, H04J 1402
Patent
active
055574394
ABSTRACT:
The present invention provides wavelength division multiplexed optical communication systems configured for expansion with additional optical signal channels. In one embodiment, the WDM system comprises N source lasers for producing N optical signal channels, each channel having a unique wavelength where N is a whole number greater than or equal to 2. An optical multiplexer module having N+x inputs, where x is a whole number greater than or equal to 1, optically communicates with each of the N source lasers. The N+x input ports of the multiplexer are configured such that the N input ports are optically coupled to the N source lasers and the x input ports are supplemental ports not optically coupled to the N source lasers. An optical transmission path optically communicates with the multiplexer for carrying a multiplexed optical signal comprising the N optical signal channels. N optical channel selecting modules are provided, each selecting module including a Bragg grating configured to select a unique optical channel wavelength. An optical splitter module optically communicates with the optical transmission path and the optical channel selecting modules. The optical splitter includes N+y output ports, where y is a whole number greater than or equal to 1. The N+y output ports are configured such that each of the N output ports is optically coupled to one of the N optical channel selecting modules and the y output ports are supplemental ports not optically coupled to the N optical channel selecting modules.
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Alexander Stephen B.
Chaddick Steve W.
Mizrahi Victor
Burke Margaret A.
Ciena Corporation
Pascal Leslie
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