Add/drop-drop and continue-module and drop and continue module

Details Add/drop-drop and continue-module and drop and continue module Add/drop-drop and continue-module and drop and continue module

2007-09-04

2007-09-04

Sedighian, M. R. (Department: 2613)

Optical communications

Multiplex

Wavelength division or frequency division

C398S083000, C398S084000

Reexamination Certificate

active

09644881

ABSTRACT:
A tunable add/drop&continue or drop&continue module comprises two optical filters where at least one is tunable and that are arranged following one another between a branching unit for optical signals and an insertion unit follow a branching unit for optical signals. The reflection attenuation of the one tunable optical filter is lower and the transmission attenuation higher than that of the other optical filter, as a result of which the drop&continue function of the module can be realized without high circuit-oriented expense.

REFERENCES:
patent: 5706375 (1998-01-01), Mihailov et al.
patent: 5712717 (1998-01-01), Hamel et al.
patent: 5712932 (1998-01-01), Alexander et al.
patent: 5748349 (1998-05-01), Mizrahi
patent: 6602000 (2003-08-01), Madsen
Drop-Filter mit Zrkulator und durchstimmbarem FBG—p. 89, Aug. 19, 1999.

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