Low Cost Secure Submarine ROADM Branching Unit Using Bidirectional Wavelength-Selective Switch
First Claim
1. A system for communicating in a submarine transmission network, comprising:
- first, second, third and fourth bi-directional terminals; and
a reconfigurable optical add/drop multiplexer (ROADM) unit coupled to the terminals, including;
a first optical circulator coupled to the first terminal;
a second optical circulator coupled to the second terminal;
a third optical circulator coupled to the third terminal;
a fourth optical circulator coupled to the fourth terminal;
a first wavelength-selective switch (WSS), coupled to the first, second, and third optical circulators;
a second WSS coupled to the first, second, and fourth optical circulators, wherein the first and second WSSes are bidirectional operated;
a first 1;
2 coupler positioned between the first circulator and the first and second WSSes;
a second 1;
2 coupler positioned between the second circulator and the first and second WSSes.
2 Assignments
0 Petitions
Accused Products
Abstract
A reconfigurable optical add/drop multiplexer (ROADM) unit includes a first optical circulator coupled to a first terminal; a second optical circulator coupled to a second terminal; a third optical circulator coupled to a third terminal; a fourth optical circulator coupled to a fourth terminal; a first wavelength-selective switch (WSS), coupled to the first, second, and third optical circulators; a second WSS coupled to the first, second, and fourth optical circulators, wherein the first and second WSSes are bidirectional operated; a first 1:2 coupler positioned between the first circulator and the first and second WSSes; a second 1:2 coupler positioned between the second circulator and the first and second WSSes.
29 Citations
14 Claims
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1. A system for communicating in a submarine transmission network, comprising:
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first, second, third and fourth bi-directional terminals; and a reconfigurable optical add/drop multiplexer (ROADM) unit coupled to the terminals, including; a first optical circulator coupled to the first terminal; a second optical circulator coupled to the second terminal; a third optical circulator coupled to the third terminal; a fourth optical circulator coupled to the fourth terminal; a first wavelength-selective switch (WSS), coupled to the first, second, and third optical circulators; a second WSS coupled to the first, second, and fourth optical circulators, wherein the first and second WSSes are bidirectional operated; a first 1;
2 coupler positioned between the first circulator and the first and second WSSes;a second 1;
2 coupler positioned between the second circulator and the first and second WSSes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A reconfigurable optical add/drop multiplexer (ROADM) unit, comprising:
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a first optical circulator coupled to a first terminal; a second optical circulator coupled to a second terminal; a third optical circulator coupled to a third terminal; a fourth optical circulator coupled to a fourth terminal; a first wavelength-selective switch (WSS), coupled to the first, second, and third optical circulators; a second WSS coupled to the first, second, and fourth optical circulators, wherein the first and second WSSes are bidirectional operated; a first 1;
2 coupler positioned between the first circulator and the first and second WSSes;a second 1;
2 coupler positioned between the second circulator and the first and second WSSes.
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Specification