Passive optical network distribution systems and components thereof

Patent metadata

Field	Value
Publication number	US-9584248-B2
Application number	US-201514636497-A
Country	US
Kind code	B2
Filing date	Mar 3, 2015
Priority date	Mar 3, 2014
Publication date	Feb 28, 2017
Grant date	Feb 28, 2017

Abstract

Systems and methods for delivering multiple passive optical network services are disclosed. One system includes a first optical transmission service comprising a common wavelength pair routed from a source to each of a plurality of subscribers and a second optical transmission service comprising a plurality of unique wavelength pairs, each of the unique wavelength pairs assigned to a subscriber among the plurality of subscribers. The system includes a splitter optically connected to first fiber carrying the first optical transmission service, the splitter including a plurality of outputs each delivering the first optical transmission service, and a wavelength division multiplexer connected to a second fiber, the wavelength division multiplexer separating each of the unique wavelength pairs of the second optical transmission service onto separate optical fibers. The system further includes a plurality of second wavelength division multiplexers optically connected to a different output of the plurality of outputs of the splitter and to a different one of the unique wavelength pairs from the wavelength division multiplexer, thereby combining a unique wavelength pair and a common wavelength pair onto a single fiber to be delivered to a subscriber.

First claim

The invention claimed is:

1. A system for delivering multiple passive optical network services comprising:
a first optical transmission service comprising a common wavelength pair routed from a source to each of a plurality of subscribers;
a second optical transmission service comprising a plurality of unique wavelength pairs, each of the unique wavelength pairs assigned to a subscriber among the plurality of subscribers;
a splitter optically connected to a first fiber carrying the first optical transmission service, the splitter including a plurality of outputs each delivering the first optical transmission service;
a wavelength division multiplexer optically connected to a second fiber, the wavelength division multiplexer separating each of the unique wavelength pairs of the second optical transmission service onto separate optical fibers;
a plurality of second wavelength division multiplexers optically connected to a different output of the plurality of outputs of the splitter and to a different one of the unique wavelength pairs from the wavelength division multiplexer, thereby combining a unique wavelength pair and a common wavelength pair onto a single fiber to be delivered to a subscriber; and
a band-pass filter receiving the single fiber including the unique wavelength pair and the common wavelength pair, the band-pass filter delivering one of the unique wavelength pair and the common wavelength pair to the subscriber.

2. The system of claim 1 , wherein the wavelength division multiplexer comprises an arrayed waveguide grating.

3. The system of claim 1 , further comprising a third wavelength division multiplexer optically connected to a fiber received from the central office carrying the common wavelength pair and the plurality of unique wavelength pairs, the third wavelength division multiplexer separating the common wavelength pair from the plurality of unique wavelength pairs.

4. The system of claim 1 , wherein the splitter comprises a 1:32 splitter.

5. The system of claim 1 , wherein the common wavelength pair is received on a first fiber from a central office and wherein the plurality of unique wavelength pairs is received on a second fiber from the central office.

6. The system of claim 1 , wherein the plurality of second wavelength division multiplexers includes one or more six-port wavelength division multiplexers.

7. The system of claim 1 , wherein each of the unique wavelength pairs includes an uplink wavelength and a downlink wavelength, wherein the uplink wavelength and the downlink wavelength are adjacent to each other.

8. The system of claim 7 , wherein the band-pass filter is located at a subscriber and delivers the unique wavelength pair to the subscriber in the absence of delivering the common wavelength pair.

9. The system of claim 7 , wherein the band-pass filter is located at a subscriber and delivers the common wavelength pair to the subscriber in the absence of delivering the unique wavelength pair.

10. The system of claim 1 , wherein the first optical transmission service is received at a first housing and the second optical transmission service is received at a second housing.

11. The system of claim 10 , wherein the first housing includes a connector that connects to the second housing and links the separate optical fibers from the wavelength division multiplexer to each of the plurality of second wavelength division multiplexers.

12. The system of claim 11 , wherein the connector comprises a multi-fiber connector.

13. A system for delivering multiple passive optical network services comprising:
a first optical transmission service and a second optical transmission service received on a common fiber, the first optical transmission service comprising a common wavelength pair routed from a source to each of a plurality of subscribers and the second optical transmission service comprising a plurality of unique wavelength pairs, each of the unique wavelength pairs assigned to a subscriber among the plurality of subscribers, the common fiber including the common wavelength pair and each of the unique wavelength pairs;
a splitter positioned at a terminal optically connected between a central office and a subscriber, the splitter configured to receive the single fiber and output a plurality of optical connections passing the common wavelength pair and each of the plurality of unique wavelength pairs to each of a plurality of subscribers on a single subscriber optical fiber; and
a filter at each of a plurality of subscribers, the filter connected to the single subscriber optical fiber and selected to deliver either the common wavelength pair or a selected one of the plurality of unique wavelength pairs to the subscriber associated with the filter.

14. The system of claim 13 , wherein the filter passes a unique wavelength pair including adjacent uplink and downlink wavelengths.

15. An optical distribution network including:
an optical termination enclosure located between a signal distribution source and a plurality of subscribers, the optical termination enclosure comprising:
a splitter optically connected to a first fiber carrying a first optical transmission service comprising a common wavelength pair to be routed from a source to each of the plurality of subscribers, the splitter including a plurality of outputs each configured to deliver the first optical transmission service through first hardened multi-fiber optical connectors of the optical termination enclosure; and
a wavelength division multiplexer connected to a second fiber carrying a second optical transmission service comprising a plurality of unique wavelength pairs, each of the unique wavelength pairs to be assigned to a subscriber among the plurality of subscribers, wherein the wavelength division multiplexer is configured to separate each of the unique wavelength pairs of the second optical transmission service onto separate optical fibers which are output from the optical termination enclosure through second hardened multi-fiber optical connectors; and
a multiport service terminal associated with a plurality of subscribers and connected to one of the first or second hardened multi-fiber optical connectors, thereby selecting one of the first optical transmission service or the second optical transmission service for the plurality of subscribers associated with the multiport service terminal.

16. The optical distribution network of claim 15 , further comprising a hardened multi-fiber optic connector receiving the first fiber and a different hardened multi-fiber optic connector receiving the second fiber.

Assignees

• Adc Telecommunications Inc
• Commscope Technologies Llc

Inventors

• Badar Timothy G
• Gronvall Erik
• Bolster Kristofer
• Leblanc Thomas G

Classifications

• H04J14/0245 Primary

  for downstream transmission, e.g. optical line terminal [OLT] to ONU · CPC title