Passive optical network distribution systems and components thereof

Patent metadata

Field	Value
Publication number	US-12512924-B2
Application number	US-202318357304-A
Country	US
Kind code	B2
Filing date	Jul 24, 2023
Priority date	Mar 3, 2014
Publication date	Dec 30, 2025
Grant date	Dec 30, 2025

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 optical network services comprising:
a common optical connection carrying at least a first optical transmission service and a second optical transmission service, the first optical transmission 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; a wavelength division multiplexer optically connected to the common optical connection, the wavelength division multiplexer optically joining the common optical connection to a plurality of optical connections, the plurality of optical connections including a first optical connection associated with the first optical service and a second optical connection associated with the second optical service; a splitter optically connected to the first optical connection of the wavelength division multiplexer; and a filter array optically connected to the second optical connection of the wavelength division multiplexer, wherein the filter array includes at least:
a first filter optically connected to the second optical connection of the wavelength division multiplexer, the first filter having a first filter fiber associated with a first subset of wavelengths within the second plurality of wavelengths and a second filter fiber associated with a first remainder of wavelengths of the second plurality of wavelengths; and
a second filter optically connected to the first filter via the second filter fiber to receive the first remainder of wavelengths, the second filter having a third filter fiber associated with a second subset of wavelengths within the first remainder of wavelengths and a fourth filter fiber associated with a second remainder of wavelengths.

2 . The system of claim 1 , wherein the second filter passes the second remainder of wavelengths to remaining filters of the filter array.

3 . The system of claim 1 , wherein the system is located apart from and downstream of the central office.

4 . The system of claim 1 , wherein the first optical service is provided from the system to a first plurality of subscribers and the second optical service is provided from the system to a second plurality of subscribers.

5 . The system of claim 1 , wherein the wavelength division multiplexer, the splitter, and the filter array are co-located with each other.

6 . The system of claim 1 , wherein the first optical service includes a first pair of wavelengths and the second optical service includes a plurality of second pairs of wavelengths.

7 . The system of claim 1 , wherein the splitter has at least 32 output fiber connections.

8 . A method of routing optical services, the method comprising:
receiving, on a common optical connection, a first optical transmission service and a second optical transmission service, the first optical transmission 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; separating, at a wavelength division multiplexer optically connected to the common optical connection, the first optical service from the second optical service; separating the second optical service at a filter array co-located with and optically connected to the wavelength division multiplexer, wherein separating the second optical service comprises:
outputting, from a first filter optically connected to the wavelength division multiplexer, a first subset of wavelengths of the second plurality of wavelengths and passing a first remainder of wavelengths of the second plurality of wavelengths; and
outputting, from a second filter optically connected to the first filter to receive the first remainder of wavelengths, a second subset of wavelengths from among the first remainder of wavelengths and passing a second remainder of wavelengths to remaining filters of the filter array.

9 . The method of claim 8 , further comprising splitting the first optical service at a splitter optically connected to the wavelength division multiplexer.

10 . The method of claim 9 , wherein the wavelength division multiplexer includes a first optical connection that is optically connected to the splitter and a second optical connection that is optically connected to the filter array.

11 . The method of claim 8 , further comprising delivering the first optical service to a first plurality of subscribers and delivering the second optical service to a second plurality of subscribers different from the first plurality of subscribers.

12 . The method of claim 8 , wherein the wavelength division multiplexer, the splitter, and the filter array are co-located.

13 . The method of claim 8 , wherein the wavelength division multiplexer, the splitter, and the filter array are located at an outside plant terminal optically connected between the central office and subscribers including the first plurality of subscribers and the second plurality of subscribers.

14 . The method of claim 8 , further comprising recombining, at a second wavelength division multiplexer, the first plurality of wavelengths with the first subset of wavelengths of the second plurality of wavelengths.

15 . The method of claim 14 , further comprising recombining, at a third wavelength division multiplexer, the first plurality of wavelengths with the second subset of wavelengths of the second plurality of wavelengths.

16 . The method of claim 8 , wherein the common optical connection is optically connected to an optical fiber carrying the first optical transmission service and the second optical transmission service at the central office.

17 . The method of claim 8 , wherein the first optical transmission service and the second optical transmission service comprise passive optical network transmission services.

18 . The method of claim 8 , 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.

Assignees

• Commscope Technologies Llc

Inventors

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

Classifications

• H04J14/0245 Primary

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