Reconfigurable add-drop multiplexer for optical communications s

Details Reconfigurable add-drop multiplexer for optical communications s Reconfigurable add-drop multiplexer for optical communications s

1997-06-20

2000-03-07

Lee, John D.

Optical waveguides

With optical coupler

Plural

385 16, 359127, 359128, 359130, H04J 1402

Patent

active

060350806

ABSTRACT:
In accordance with the invention, an optical multiplexer includes at least one reconfigurable add-drop unit that can add-drop one channel out of a large set by switching the light path through one of a set of fixed add-drop filters. Reconfiguration is done by switching from the add-drop filter path to a bypass path, changing to a different add-drop filter and then switching back. The phase delay of the bypass path is adjusted to maintain nearly maximum transmission during switching. The selection among add-drop filters is done by sliding an integrated optic chip with the set of add-drop filters between input and output waveguides. The reconfigurable add-drop multiplexer unit is latchable, passive between reconfigurations, and has low intrinsic insertion loss. Plural units in series can add/drop plural channels.

REFERENCES:
patent: 4900119 (1990-02-01), Hill et al.
patent: 4963177 (1990-10-01), Najafi et al.
patent: 5044715 (1991-09-01), Kawachi et al.
patent: 5271074 (1993-12-01), Tocci
patent: 5461683 (1995-10-01), Harman
patent: 5471332 (1995-11-01), Shiragaki et al.
patent: 5488500 (1996-01-01), Glance
patent: 5526439 (1996-06-01), Bergmann
patent: 5771112 (1998-06-01), Hamel et al.

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