Shared High-Intensity Broadband Light Source for a Wavelength-Division Multiple Access Passive Optical Network

• US 20070274729A1
• Filed: 06/01/2004
• Published: 11/29/2007
• Est. Priority Date: 05/30/2003
• Status: Active Grant

• Current Assignee: Novera Optics, Inc. (Lg-Nortel Company Limited)
• Original Assignee: Novera Optics, Inc. (Lg-Nortel Company Limited)
• Inventors: Lee, Chang-Hee, Oh, Tae, Kim, Bong
• Granted Patent: US 8,861,963 B2
• Time in Patent Office: Days
• US Class Current: 398/153
• CPC Class Codes: H04B 10/506 Multiwavelength transmitters
• CPC Class Codes: H04J 14/02 Wavelength-division multiplex systems
• CPC Class Codes: H04J 14/0226 Fixed carrier allocation, e.g. according to service
• CPC Class Codes: H04J 14/0246 using one wavelength per ONU
• CPC Class Codes: H04J 14/0247 Sharing one wavelength for at least a group of ONUs
• 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 14/0252 Sharing one wavelength for at least a group of ONUs, 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 14/0291 Shared protection at the optical multiplex section (1:1, n:m)
• CPC Class Codes: H04J 14/0297 Optical equipment protection
• CPC Class Codes: H04J 14/06 Polarisation multiplex systems

Abstract

An optical power distributor is coupled to a high-intensity broadband light source to distribute in a shared manner an output of the high-intensity broadband light source to a plurality of optical line terminals. A depolarizer is also described having an input coupled to an output of a polarized broadband light source. A first integrated module has optical transmitters and an optical wavelength router for a first band. A second integrated module has optical receivers and an optical wavelength router for a second band.

Claims

1. An apparatus comprising:

a high-intensity broadband light source;

an optical power distributor coupled to the high-intensity broadband light source to distribute in a shared manner an output of the high-intensity broadband light source to a plurality of optical line terminals.

2. The apparatus of claim 1, wherein the output of the high-intensity broadband light source is incoherent light.

3. The apparatus of claim 1, wherein the high-intensity broadband light source is for a first band of light.

4. An apparatus comprising:

a plurality of high-intensity broadband light sources;

an optical power distributor coupled to the plurality of high-intensity broadband light sources to distribute in a shared manner outputs of the plurality of high-intensity broadband light sources to a plurality of optical line terminals.

5. The apparatus of claim 4, wherein the plurality of high-intensity broadband light sources comprise two high-intensity broadband light sources.

6. The apparatus for claim 4, wherein the plurality of high-intensity broadband light sources comprise more than two high-intensity broadband light sources.

7. An apparatus comprising:

a plurality of high-intensity broadband light sources;

an optical path controller to switch among respective outputs of the plurality of high-intensity broadband light sources in order to provide an output;

an optical power distributor coupled to the output of the optical path controller to distribute in a shared manner the output of the optical path controller to a plurality of optical line terminals.

8. The apparatus of claim 7, wherein the optical path controller is controlled by a control signal.

9. An apparatus comprising:

a plurality of first high-intensity broadband light sources;

a plurality of optical power distributors coupled to respective ones of the plurality of first high-intensity broadband light sources, each of the plurality of optical power distributors having a plurality of outputs coupled to respective ones of a plurality of optical line terminals;

a second high-intensity broadband light source;

an optical path switch having an input coupled to an output of the second high-intensity broadband light source and having a plurality of outputs, wherein each output of the plurality of outputs of the optical path switch is coupled to an input of a respective one of the plurality of optical power distributors, wherein the optical path switch couples the output of the second high-intensity broadband light source to the input of one of the plurality of optical power distributors.

10. The apparatus of claim 9, wherein the optical path switch is controlled by a control signal.

11. An apparatus comprising:

a plurality of high-intensity broadband light sources;

an optical distributor coupled to the plurality of high-intensity broadband light sources to distribute in a shared manner outputs of the plurality of high-intensity broadband light sources to a plurality of outputs of the optical distributor;

a plurality of optical power distributors, wherein each one of the plurality of optical power distributors has an input coupled to a respective one of the plurality of outputs of the optical distributor, wherein each one of the plurality of optical power distributors has a plurality of outputs coupled to respective ones of a plurality of optical line terminals, wherein each of the optical power distributors distributes in a shared manner an optical input among the outputs.

12. An apparatus comprising:

a broadband light source;

an optical power distributor coupled to the broadband light source to distribute in a shared manner an output of the broadband light source to a plurality of outputs of the optical power distributor;

a plurality of optical amplifiers coupled to respective ones of the plurality of outputs of the optical power distributor.

13. The apparatus of claim 12, wherein respective outputs of the plurality of optical amplifiers are coupled to respective ones of a plurality of broadband light source couplers of respective optical line terminals.

14. An apparatus comprising:

a polarized broadband light source;

a depolarizer having an input coupled to an output of the polarized broadband light source.

15. An apparatus comprising:

a first broadband light source having an output polarized in a first direction;

a second broadband light source having an output polarized in a second direction, wherein the second direction is different from the first direction;

a polarizing coupler having a first input coupled to the output of the first broadband light source and having a second input coupled to the output of the second broadband light source.

16. An apparatus comprising:

a first integrated module comprising

a plurality of optical transmitters;

an optical wavelength router for a first band;

a second integrated module comprising;

a plurality of optical receivers;

an optical wavelength router for a second band.

17. The apparatus of claim 16, further comprising:

a broadband light source for the first band coupled to the optical wavelength router for the first band;

a broadband light source for the second band coupled to the optical wavelength router for the second band.