Expandable wavelength division multiplexed optical communication

Details Expandable wavelength division multiplexed optical communication Expandable wavelength division multiplexed optical communication

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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patent: 5121244 (1992-06-01), Takasaki
patent: 5173794 (1992-12-01), Cheung et al.
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patent: 5448388 (1995-09-01), Ohde et al.
patent: 5457760 (1995-10-01), Mizrahi
patent: 5467212 (1995-11-01), Huber

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