Automatic optical link calibration of amplified optical links

Patent metadata

Field	Value
Publication number	US-12160306-B2
Application number	US-202318457890-A
Country	US
Kind code	B2
Filing date	Aug 29, 2023
Priority date	Nov 13, 2018
Publication date	Dec 3, 2024
Grant date	Dec 3, 2024

Abstract

Systems and methods for automatic link calibration include subsequent to installation of equipment for the amplified optical section, obtaining power measurements of optical spectrum in the optical section; obtaining properties of fiber in the amplified optical link; analyzing the power measurements and the properties of the fiber to determine settings for the equipment for calibration thereof; and automatically configuring the settings for the equipment. The settings are based on the power measurements and the properties of the fiber to achieve a target launch power per span in the amplified optical section, and wherein the target launch power is based on Optical Signal-to-Noise Ratio (OSNR) and non-linearity in the amplified optical section.

First claim

What is claimed is:

1. A non-transitory computer-readable storage medium having computer readable code stored thereon for programming a controller to perform steps of:
subsequent to installation of equipment for the amplified optical section and performing measurements in the amplified optical section. wherein the measurements include power measurements and Optical Signal-to-Noise Ratio (OSNR), obtaining the power measurements of optical spectrum from the amplified optical section;
obtaining properties of fiber in the amplified optical link where the properties determine non-linearity of the fiber;
analyzing the power measurements and the properties of the fiber to determine settings for the equipment for calibration thereof, wherein the settings are determined based on the power measurements and the properties of the fiber to achieve a target launch power per spen in the amplified optical section, and wherein the target launch power is determined based on the OSNR and the non-linearity from the properties; and
automatically causing configuring of the settings for the equipment in the amplified optical section.

2. The non-transitory computer-readable storage medium of claim 1 , wherein the settings include one or more of Raman gain, Erbium Doped Fiber Amplifier (EDFA) gain, mid-stage equalization settings in EDFAs, gain/loss actuator settings, and Variable Optical Attenuator (VOA) settings.

3. The non-transitory computer-readable storage medium of claim 1 , wherein the settings include a mode of Erbium Doped Fiber Amplifier (EDFA), wherein the mode is a number of active gain blocks in the EDFA.

4. The non-transitory computer-readable storage medium of claim 1 , wherein the settings are determined based on actually deployed conditions instead of via simulation with offline planning.

5. The non-transitory computer-readable storage medium of claim 1 , wherein, when the amplified optical section has less than full capacity of traffic signals subsequent to the installation, the installation includes one or more channel holders in the amplified optical section.

6. The non-transitory computer-readable storage medium of claim 1 , wherein the obtaining properties of the fiber includes an Optical Time Domain Reflectometry (OTDR) measurement to determine reflection and losses.

7. The non-transitory computer-readable storage medium of claim 1 , wherein the obtaining properties of the fiber includes a telemetry signal measurement to detect one or more of effective core area, Stimulated Raman Scattering (SRS) gain coefficient, and fiber type.

8. The non-transitory computer-readable storage medium of claim 1 , wherein the calibration is at full-fill spectral conditions on the amplified optical section.

9. A method of automatic optical link calibration of an amplified optical section in an optical network, the method comprising steps of:
subsequent to installation of equipment for the amplified optical section and performing measurements in the amplied optical section, wherein the measurements include power measurements and Optical Signal-to-Noise Ratio (OSNR), obtaining the power measurements of optical spectrum in the amplified optical section;
obtaining properties of fiber in the amplified optical link wherein the properties determine non-linearity of the fiber;
analyzing the power measurements and the properties of the fiber to determine settings for the equipment for calibration thereof, wherein the settings are determined based on the power measurements and the properties of the fiber to achieve a target launch power per span in the amplified optical section and wherein the target launch power is determined based on the OSNR and the non-linearity from the properties; and
automatically configuring the settings for the equipment.

10. The method of claim 9 , wherein the settings include one or more of Raman gain, Erbium Doped Fiber Amplifier (EDFA) gain, mid-stage equalization settings in EDFAs, gain/loss actuator settings, and Variable Optical Attenuator (VOA) settings.

11. The method of claim 9 , wherein the settings include a mode of Erbium Doped Fiber Amplifier (EDFA), wherein the mode is a number of active gain blocks in the EDFA.

12. The method of claim 9 , wherein the settings are determined based on actually deployed conditions instead of via simulation with offline planning.

13. The method of claim 9 , wherein, when the amplified optical section has less than full capacity of traffic signals subsequent to the installation, the installation includes one or more channel holders in the amplified optical section.

14. The method of claim 9 , wherein the obtaining properties of the fiber includes an Optical Time Domain Reflectometry (OTDR) measurement to determine reflection and losses.

15. The method of claim 9 , wherein the obtaining properties of the fiber includes a telemetry signal measurement to detect one or more of effective core area, Stimulated Raman Scattering (SRS) gain coefficient, and fiber type.

16. The method of claim 9 , wherein the calibration is at full-fill spectral conditions on the amplified optical section.

17. A controller comprising one or more processors and memory storing instructions that, when executed, cause the one or more processors to:
subsequent to installation of equipment for the amplified optical section and performing measurements in the amplified optical section, wherein the measurements include power measurements and Optical Signal-to-Noise Ratio (OSNR), obtain the power measurements of optical spectrum in the amplified optical section,
obtain properties of fiber in the amplified optical link where the operties determine non-linearity of the fiber,
analyze the power measurements and the properties of the fiber to determine settings for the equipment for calibration thereof, wherein the settings are determined based on the power measurements and the pr perties of the fiber to achieve a target launch power span in the amplified optical section, and wherein the target launch power is determined based on the OSNR and the non-linearity from the properties, and
automatically cause configuration of the settings for the equipment.

Assignees

• Ciena Corp

Inventors

• Al Sayeed Choudhury A
• Bownass David C
• Atkinson David
• Kohlert Scott

Classifications

• H04J14/0221

  Power control, e.g. to keep the total optical power constant · CPC title

• H04J14/02216

  by gain equalization · CPC title

• H04B10/07953

  Monitoring or measuring OSNR, BER or Q · CPC title

• H04B10/27

  Arrangements for networking · CPC title

• H04B10/07955

  Monitoring or measuring power · CPC title