H - Electricity – 04 – J
Patent
H - Electricity
04
J
H04J 14/02 (2006.01)
Patent
CA 2327050
An optical wavelength add/drop multiplexer (WADM) is configured to aced or drop two or more signals each associated with one of a plurality of channels in a wavelength division multiplexed (WDM) signal. The WADM comprises an optical circulator that is optically coupled at one port to two or more serially interconnected fiber Bragg gratings (FBGs), and is optically coupled at another port to a thin film filter including two or more serially interconnected thin film filter elements. Each of the two or more FBGs is matched with a thin film filter element, both arranged to be responsive to signals associated with one of the plurality of channels. Bandwidth and dispersion properties for the FBGs are selected to permit operation of the WADM at two distinct signal data rates. To equalize associated insertion losses in embodiments of the invention arranged to add or drop two or more signals, the FBGs are matched to the thin film fitter elements in inverse order with respect to their optical distance from the optical circulator.
Nielsen Torben N.
Spector Magaly
Thompson William A.
Kirby Eades Gale Baker
Lucent Technologies Inc.
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