System and method for operating a wideband return channel in a bi-directional optical communication system

• US 20060187863A1
• Filed: 12/21/2005
• Published: 08/24/2006
• Est. Priority Date: 12/21/2004
• Status: Abandoned Application

• Current Assignee: Enablence USA Fttx Networks, Inc. (Enablence Technologies Incorporated), WaveOptics, Ltd. (Snap, Inc.)
• Original Assignee: Wave7 Optics, Inc. (Enablence Technologies Incorporated)
• Inventors: Kenny, John, Farmer, James
• Application Number:
  US11/316,423
• Publication Number:
  US 20060187863A1
• Time in Patent Office: Days
• US Class Current: 370/296
• CPC Class Codes: H04J 14/02 Wavelength-division multiplex systems
• CPC Class Codes: H04J 14/0201 Add-and-drop multiplexing
• CPC Class Codes: H04J 14/0224 Irregular wavelength spacing, e.g. to accommodate interference to all wavelengths
• CPC Class Codes: H04J 14/0226 Fixed carrier allocation, e.g. according to service
• CPC Class Codes: H04J 14/0227 Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
• CPC Class Codes: H04J 14/0232 for downstream transmission
• CPC Class Codes: H04J 14/0246 using one wavelength per ONU
• CPC Class Codes: H04J 14/025 using one wavelength per ONU, e.g. for transmissions from-ONU-to-OLT or from-ONU-to-ONU
• CPC Class Codes: H04J 14/0282 WDM tree architectures
• CPC Class Codes: H04J 14/0283 WDM ring architectures
• CPC Class Codes: H04J 14/0294 Dedicated protection at the optical channel (1+1)
• CPC Class Codes: H04J 14/0305 in end terminals

Abstract

An inventive system capable of being utilized in environments where laser transceiver nodes may be subject to extreme temperatures. Temperature changes in the laser transceiver nodes may be compensated for by utilizing a wide wavelength channel allocation for data sent upstream from the laser transceiver nodes to the data service hub. The wavelength channel allocations for upstream data may be wider than the wavelength channel allocations for downstream data. An exemplary embodiment of the inventive system may comprise a data service hub connected to one or more laser transceiver nodes by one or more optical waveguides. Some embodiments with multiple optical waveguides are capable of practicing route redundancy. According to an exemplary embodiment of the inventive system, the optical waveguides are capable of carrying multiple optical signals at different wavelengths in order to serve a plurality of laser transceiver nodes.

Claims

1. A system for operating a wideband return channel allocation in a bi-directional optical communication system, comprising:

a first optical transmitter for transmitting a first optical signal on an optical waveguide in a first direction;

a first optical receiver for receiving said first optical signal transmitted on said optical waveguide;

a second optical transmitter for transmitting a second optical signal on said optical waveguide in a second direction, wherein said second direction is the opposite of said first direction;

a second optical receiver for receiving said second optical signal transmitted on said optical waveguide;

an optical multiplexer for multiplexing said first optical signal, said multiplexer designed to multiplex said first optical signal according to a first optical channel width; and

a demultiplexer for demultiplexing said second optical signal, said demultiplexer designed to multiplex said second optical signal according to a second optical channel width, wherein said second optical channel width is wider than said first optical channel width.

2. The system in claim 1, further comprising an optical transmitter for transmitting a radio frequency broadcast video optical signal.

3. The system in claim 2, wherein said radio frequency broadcast video optical signal is transmitted in said first direction along a second optical waveguide.

4. The system in claim 1, further comprising a drop/add device for routing said second optical signal, said drop/add device designed according to said second optical channel width.

5. The system in claim 1, wherein said first optical transmitter is located in a temperature controlled environment.

6. The system in claim 1, wherein said second optical transmitter is located in an uncontrolled temperature environment.

7. The system in claim 1, wherein said second optical channel width is twice the width of said first optical channel width.

8. The system in claim 1, wherein said first optical channel width corresponds to one of the channel widths as defined in the International Telecommunications Union wavelength allocation standard.

9. The system in claim 1, wherein said first optical channel width is 13 nanometers and said second optical channel width is 26 nanometers.

10. The system in claim 1, wherein the optical transmitters comprise distributed feed back lasers.

11. The system in claim 1, wherein the optical transmitters comprise Fabry-Perot Laser Transmitters.

12. The system in claim 1, wherein the optical transmitters comprise Vertical Cavity Surface Emitting Lasers.

13. A system for operating a wideband return channel allocation in a bi-directional optical communication system, comprising:

a first optical transmitter for transmitting a first optical signal on a first optical waveguide in a first direction;

a first optical receiver for receiving said first optical signal transmitted on said first optical waveguide;

a second optical transmitter for transmitting a second optical signal on a second optical waveguide in a second direction, wherein said second direction is the opposite of said first direction;

a second optical receiver for receiving said second optical signal transmitted on said second optical waveguide;

an optical multiplexer for multiplexing said first optical signal, said multiplexer designed to multiplex said first optical signal according to a first optical channel width; and

a demultiplexer for demultiplexing said second optical signal, said demultiplexer designed to multiplex said second optical signal according to a second optical channel width, wherein said second optical channel width is wider than said first optical channel width.

14. The system described in claim 13, further comprising an optical transmitter for transmitting a radio frequency broadcast video optical signal in said first direction on said second optical waveguide.

15. The system in claim 13, further comprising a drop/add device for routing said second optical signal, said drop/add device designed according to said second optical channel width.

16. The system described in claim 13, wherein said first optical transmitter is located in a temperature controlled environment.

17. The system described in claim 13, wherein said second optical transmitter is located in an uncontrolled temperature environment.

18. The system described in claim 13, wherein said second optical channel width is twice the width of said first optical channel width.

19. The system described in claim 13, wherein said first optical channel width corresponds to one of the channel widths as defined in the International Telecommunications Union wavelength allocation standard.

20. The system described in claim 13, wherein said first optical channel width is 13 nanometers and said second optical channel width is 26 nanometers.

21. A method for propagating a wideband return channel allocation in a bi-directional optical communication system, comprising the steps of:

transmitting a first optical signal from a first optical transmitter on an optical waveguide in a first direction;

multiplexing said first optical signal according to a first optical channel width;

transmitting a second optical signal from a second optical transmitter on said optical waveguide in a second direction, wherein said second direction is the opposite of said first direction;

demultiplexing said second optical signal according to a second optical channel width, said second optical channel width is wider than said first optical channel width.

22. The method according to claim 21, further comprising the steps of:

demultiplexing said first optical signal according to said first optical channel width; and

multiplexing said second optical signal according to said second optical channel width.

23. The method according to claim 21, further comprising the steps of:

routing said first optical signal with a first drop/add device, said first drop/add device designed according to said first optical channel width.

routing said second optical signal with a second drop/add device, said second drop/add device designed according to said second optical channel width.

24. The method according to claim 21, further comprising the steps of:

broadcasting a radio frequency broadcast optical signal from a third optical transmitter;

amplifying said radio frequency broadcast optical signal with an amplifier;

propagating said radio frequency broadcast optical signal in said first direction along a second optical waveguide.

25. A method for propagating a wideband return channel allocation in a bi-directional optical communication system, comprising the steps of:

transmitting a first optical signal from a first optical transmitter on a first optical waveguide in a first direction;

multiplexing said first optical signal according to a first optical channel width;

transmitting a second optical signal from a second optical transmitter on a second optical waveguide in a second direction, wherein said second direction is the opposite of said first direction;

demultiplexing said second optical signal according to a second optical channel width, said second optical channel width is wider than said first optical channel width.

26. The method according to claim 25, further comprising the steps of:

demultiplexing said first optical signal according to said first optical channel width; and

multiplexing said second optical signal according to said second optical channel width.

27. The method according to claim 25, further comprising the steps of:

routing said first optical signal with a first drop/add device, said first drop/add device designed according to said first optical channel width.

routing said second optical signal with a second drop/add device, said second drop/add device designed according to said second optical channel width.

28. The method according to claim 25, further comprising the steps of:

broadcasting a radio frequency broadcast optical signal from a third optical transmitter;

amplifying said radio frequency broadcast optical signal with an amplifier;

propagating said radio frequency broadcast optical signal in said first direction along said second optical waveguide.