Passive optical ring network
First Claim
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1. An optical communication network comprising:
- a passive optical ring mesh network including a plurality of closed optical fibre loops, each loop being interconnected with at least two other loops by respective optical couplers,the loops being provided with a plurality of input/output nodes constituted by optical couplers,the nodes being so positioned, and of such a number, that the optical path length through any given pair of nodes includes n couplers where n is less than the number of nodes.
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Abstract
An optical ring mesh network includes a plurality of optical rings, each of which is coupled to at least one other ring by a respective optical coupler. The rings are provided with a plurality of input/output nodes constituted by optical couplers. The nodes are so positioned, and are of such a number, that the optical path length between any given pair of nodes includes n couplers where n is less than the number of nodes.
22 Citations
12 Claims
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1. An optical communication network comprising:
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a passive optical ring mesh network including a plurality of closed optical fibre loops, each loop being interconnected with at least two other loops by respective optical couplers, the loops being provided with a plurality of input/output nodes constituted by optical couplers, the nodes being so positioned, and of such a number, that the optical path length through any given pair of nodes includes n couplers where n is less than the number of nodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A passive optical ring mesh network comprising
a plurality of closed optical fibre loops, each of which is coupled to at least two other loops by respective passive optical couplers, the loops being provided with a plurality of input/output nodes constituted by passive optical couplers, at least two different optical paths being provided between any pair of nodes, and the nodes being so positioned, and of such a number, that an optical path length of at least one of the optical paths between any given pair of nodes includes n couplers, where n is less than the number of nodes.
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12. A passive optical ring mesh network comprising:
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a plurality of closed optical fibre loops each of which is coupled to at least two other loops by respective passive optical couplers, the loops being provided with a plurality of input/output nodes constituted by passive optical couplers, the nodes being so positioned, and of such a number, that an optical path length between any given pair of nodes includes n couplers, where n is less than the number of nodes, and there being at least two transmission paths between any two nodes thereby providing a secondary routing in case of failure of a transmission path.
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Specification