Passive optical network distribution systems and components thereof

Patent metadata

Field	Value
Publication number	US-11159265-B2
Application number	US-202016939309-A
Country	US
Kind code	B2
Filing date	Jul 27, 2020
Priority date	Mar 3, 2014
Publication date	Oct 26, 2021
Grant date	Oct 26, 2021

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 from a central office, the system comprising:
a common optical fiber carrying at least a first optical service and a second optical service, the first optical service occupying at least a first channel comprising a first plurality of wavelengths and the second optical service occupying at least a second channel comprising a second plurality of wavelengths;
an outside plant optical enclosure receiving the common optical fiber, the outside plant optical enclosure including:
a wavelength division multiplexer receiving the common optical fiber and separating the first optical service onto a first output fiber and the second optical service onto a second output fiber; and
a plurality of filters arranged in a filter array, the filter array including:
a first filter that receives the second output fiber, outputs onto a first filter output fiber a first subset of wavelengths within the second plurality of wavelengths, and passes a first remainder of wavelengths of the second plurality of wavelengths; and
a second filter that receives the first remainder of wavelengths of the second plurality of wavelengths from the first filter, outputs onto a second filter output fiber a second subset of wavelengths, and passes a second remainder of wavelengths to remaining filters of the filter array.

2. The system of claim 1 , wherein the remaining filters include N filters.

3. The system of claim 1 , wherein each of the first subset of wavelengths and the second subset of wavelengths represents a different optical channel of a same optical service.

4. The system of claim 3 , wherein the first plurality of wavelengths comprises a first optical service that is different from the second optical service.

5. The system of claim 4 , wherein the first output fiber is optically connected to a splitter, the splitter delivering the first optical service onto each of a plurality of splitter output fibers.

6. The system of claim 5 , further comprising a wavelength division multiplexer optically connected to at least one of the plurality of splitter output fibers and the first filter output fiber.

7. The system of claim 1 , wherein the first plurality of wavelengths comprises a first wavelength pair and the second plurality of wavelengths comprises a second wavelength pair having different wavelengths from the first wavelength pair.

8. The system of claim 1 , wherein the outside plant optical enclosure is positioned remotely from the central office and in proximity to a plurality of customers.

9. A method of delivering multiple passive optical services via an outside plant optical terminal, the method comprising:
receiving a first optical service and a second optical service on a common optical fiber, the first optical service occupying at least a first channel comprising a first plurality of wavelengths and the second optical service occupying at least a second channel comprising a second plurality of wavelengths;
at a wavelength division multiplexer, receiving the common optical fiber and separating the first optical service onto a first output fiber and the second optical service onto a second output fiber;
at a first filter of a filter array:
receiving the second output fiber and outputting onto a first filter output fiber a first subset of wavelengths within the second plurality of wavelengths, and
passing a first remainder of wavelengths of the second plurality of wavelengths;

at a second filter of the filter array:
receiving the first remainder of wavelengths and outputting onto a second filter output fiber a second subset of wavelengths within the second plurality of wavelengths different from the first subset of wavelengths, and
passing a second remainder of wavelengths of the second plurality of wavelengths to remaining filters of the filter array.

10. The method of claim 9 , further comprising delivering to a first customer the second service via the first subset of wavelengths within the second plurality of wavelengths.

11. The method of claim 10 , further comprising delivering to a second customer the second service via the second subset of wavelengths within the second plurality of wavelengths.

12. The method of claim 11 , wherein delivering the second service to the first customer comprises delivering to the first customer a single fiber carrying the first service and the second service.

13. The method of claim 9 , wherein the wavelength division multiplexer is located in an outside plant optical enclosure positioned remotely from a central office and in proximity to a plurality of customers.

14. The method of claim 9 , wherein the first subset of wavelengths and the second subset of wavelengths each include an uplink wavelength and a downlink wavelength, wherein the uplink wavelength and the downlink wavelength are adjacent to each other.

15. The method of claim 9 , wherein the first filter passes the first subset of wavelengths including a unique wavelength pair including adjacent uplink and downlink wavelengths.

Assignees

• 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