Claims
- 1. An optical add/drop multiplexer (OADM) comprising:
an input port for receiving a wavelength division multiplexed (WDM) optical signal; an output port for passing the WDM optical signal from the OADM; an optical through path for carrying the WDM optical signal from the input port to the output port; an optical drop module adapted to receive the WDM optical signal from the input port and to divert one or more wavelengths of the WDM optical signal to a drop port; an optical add module for adding one or more wavelengths from an add port to the WDM optical signal at the output port; and a dispersion compensation module positioned in the optical through path between the drop module and the add module, adapted to compensate for dispersion in the WDM optical signal passing through the through path.
- 2. An OADM as claimed in claim 1, wherein the dispersion compensation module is adapted to compensate for chromatic dispersion.
- 3. An OADM as claimed in claim 1, wherein the dispersion compensation module is adapted to compensate for dispersion at a fixed value.
- 4. An OADM as claimed in claim 1, wherein the OADM is a reconfigurable OADM (ROADM).
- 5. An OADM as claimed in claim 4, wherein the OADM is a remotely reconfigurable OADM (RROADM).
- 6. An OADM as claimed in claim 1, wherein the OADM is based on a broadcast and select architecture.
- 7. An OADM as claimed in claim 6, wherein the OADM is based on a wavelength blocker architecture.
- 8. An OADM as claimed in claim 1, wherein the OADM has an east/west architecture.
- 9. An OADM as claimed in claim 1, wherein the OADM further comprises an optical amplifier at the input port.
- 10. An OADM as claimed in claim 9, wherein the OADM further comprises an optical amplifier at the output port.
- 11. An optical network node comprising at least one OADM according to claim 1.
- 12. An optical network comprising at least one optical network node according to claim 11.
- 13. An optical network wherein alternate nodes comprise an OADM according to claim 1.
- 14. An optical network as claimed in claim 13, wherein the network has short spans.
- 15. An optical network as claimed in claim 13, wherein the network is a metro network.
- 16. A method of dispersion compensation in an optical add/drop multiplexer (OADM) having an input port, an output port and an optical through path therebetween, the method comprising steps of:
receiving a wavelength division multiplexed (WDM) optical signal at the input port; diverting one or more wavelengths of the WDM optical signal to a drop port; performing dispersion compensation on the WDM optical signal remaining in the through path; and adding one or more wavelengths from an add port to the WDM optical signal at the output port.
RELATED APPLICATION
[0001] This application claims benefit from U.S. Provisional Patent Application Serial No. 60/427,960 to Kelly, C. G., entitled “Reconfigurable Optical Add/Drop Multiplexer with Buried Dispersion Compensation Module”, and filed on 21 Nov. 2002.
Provisional Applications (1)
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Number |
Date |
Country |
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60427960 |
Nov 2002 |
US |