Fiber indexing systems
View Patent ↗The present disclosure relates to systems and method for deploying a fiber optic network. Distribution devices are used to index fibers within the system to ensure that live fibers are provided at output locations throughout the system. In an example, fibers can be indexed in multiple directions within the system. In an example, spare ports can be providing in a forward direction and reverse direction ports can also be provided.
1. A fiber optic network comprising:
a plurality of optical fibers carrying optical signals, the optical signals being either: a) an overlay of PON and WDM signals; or b) PON and WDM signals transmitted over separate ones of the optical fibers, the plurality of optical fibers including first optical fibers and second optical fibers;
a network component coupled to the plurality of optical fibers, the network component including an optical power splitter configured to split the optical signals carried over the first optical fibers onto a first multi-fiber cable, the second optical fibers bypassing the optical power splitter; and
at least one chain of multi-fiber indexing components, the at least one chain being optically coupled to at least one of the first optical fibers and to at least one of the second optical fibers at the network component.
2. The fiber optic network of claim 1 , wherein the optical signals carried by the second optical fibers pass onto a second multi-fiber cable that is routed to the at least one chain of multi-fiber indexing components.
3. The fiber optic network of claim 1 , wherein the first multi-fiber cable is routed to a first end of the at least one chain of multi-fiber indexing components and the second multi-fiber cable is routed to a second end of the at least one chain of multi-fiber indexing components.
4. The fiber optic network of claim 1 , wherein the optical signals carried by the second optical fibers pass onto the first multi-fiber cable, which is routed to a first end of the at least one chain of multi-fiber indexing components.
5. The fiber optic network of claim 1 , wherein the optical power splitter is one of a plurality of optical power splitters at the network component.
6. The fiber optic network of claim 1 , wherein the first optical fibers and the second optical fibers are optically coupled to the chain of multi-fiber indexing components in a forward direction.
7. The fiber optic network of claim 1 , wherein the first optical fibers are optically coupled to the chain of multi-fiber indexing components in a forward direction and the second optical fibers are optically coupled to the chain of multi-fiber indexing components in a reverse direction.
8. The fiber optic network of claim 1 , wherein the PON and WDM signals are overlaid at a central location and are transmitted to the network component without subsequent power splitting of the overlaid PON and WDM signals at a first location.
9. The fiber optic network of claim 1 , wherein one or more of the multi-fiber indexing components includes a passive optical power splitter having a split ratio coordinated with a split ratio of the optical power splitter at the network component.
10. The fiber optic network of claim 1 , wherein outputs of the optical power splitter are routed to a distribution panel for connection to the first multi-fiber cable.
11. The fiber optic network of claim 1 , wherein a first of the multi-fiber indexing components includes a passive optical power splitter, and wherein the first multi-fiber indexing component includes first drop ports optically coupled to the passive optical power splitter and at least one second drop port not optically coupled to the passive optical power splitter of the first multi-fiber indexing component.
12. The fiber optic network of claim 1 , wherein at least 40 percent of the optical fibers coupled to the network component bypass the optical power splitter.
13. The fiber optic network of claim 1 , wherein at least one of the multi-fiber indexing components of the chain is different from another of the multi-fiber indexing components of the chain.
14. The fiber optic network of claim 1 , wherein at least one of the multi-fiber indexing components of the chain includes first and second connection interfaces between which optical fibers are indexed, an optical splitter receiving a drop cable from the first connection interface, a port at which a split signal is received from the optical splitter, and a port at which a non-split signal is received from the first connection interface.
15. The fiber optic network of claim 1 , wherein the network component includes a splitter mounting chassis at which the optical power splitter is mounted.
16. The fiber optic network of claim 5 , wherein the plurality of optical power splitters includes first and second passive optical power splitters that have different split ratios.
17. The fiber optic network of claim 5 , wherein the first multi-fiber cable receives outputs from the plurality of optical power splitters.
18. The fiber optic network of claim 5 , wherein outputs of the optical power splitters are routed to a distribution panel.
19. The fiber optic network of claim 11 , wherein the network component includes a wavelength division multiplexer for splitting the optical signals from at least one of the optical fibers based on wavelength, and wherein an output side of the wavelength division multiplexer is optically coupled to the chain of multi-fiber indexing components.
20. The fiber optic network of claim 15 , further comprising a fan-out module at which fibers of a ribbon cable are separated into individual fibers, the fan-out module being mounted at the splitter mounting chassis.
21. The fiber optic network of claim 20 , wherein the fan-out module includes a module housing having a same overall shape as a housing of the optical power splitter.
22. The fiber optic network of claim 19 , wherein the output side of the wavelength division multiplexer is optically coupled to drop ports of the first multi-fiber indexing component that are not optically coupled to the passive optical power splitter of the first multi-fiber indexing component.
23. The fiber optic network of claim 19 , wherein the second optical fibers are optically coupled to drop ports of the first multi-fiber indexing component that are not optically coupled to the passive optical power splitter of the first multi-fiber indexing component.