# US 2023/0412296 A1 · Automatic optical link calibration of amplified optical links > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0412296 A1 - Document ID: US20230412296A1 - Status: Published application - Kind: A1 - Application number: 18/457,890 - Filed: 2023-08-29 - Published: 2023-12-21 - Earliest claimed: 2018-11-13 - Assignees: Ciena Corporation - Applicants: Ciena Corporation - Inventors: Choudhury A. Al Sayeed; David C. Bownass; David Atkinson; Scott Kohlert - Web page: https://patentgrep.com/patent/US20230412296A1 ## CPC - H04B 10/0775: {Performance monitoring and measurement of transmission parameters} - H04J 14/0202: {Arrangements therefor} - H04B 10/071: using a reflected signal, e.g. using optical time domain reflectometers [OTDR] - H04B 10/0777: {Monitoring line amplifier or line repeater equipment} - H04B 10/07953: {Monitoring or measuring OSNR, BER or Q} - H04B 10/07955: {Monitoring or measuring power} - H04B 10/0797: {Monitoring line amplifier or line repeater equipment} - H04B 10/2507: for the reduction or elimination of distortion or dispersion - H04B 10/27: Arrangements for networking - H04J 14/0221: {Power control, e.g. to keep the total optical power constant} - H04J 14/02216: {by gain equalization} - H04B: TRANSMISSION - H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S) ## 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. ## Claims ### Claim 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, 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. ### Claim 2 (depends on 1) The non-transitory computer-readable storage medium of claim 1, wherein 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. ### Claim 3 (depends on 1) 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. ### Claim 4 (depends on 1) 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. ### Claim 5 (depends on 1) 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. ### Claim 6 (depends on 1) 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. ### Claim 7 (depends on 1) 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. ### Claim 8 (depends on 1) 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. ### Claim 9 (depends on 1) The non-transitory computer-readable storage medium of claim 1, wherein the calibration is at full-fill spectral conditions on the amplified optical section. ### Claim 10 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, 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. ### Claim 11 (depends on 10) The method of claim 10, wherein 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. ### Claim 12 (depends on 10) The method of claim 10, 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. ### Claim 13 (depends on 10) The method of claim 10, 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. ### Claim 14 (depends on 10) The method of claim 10, wherein the settings are determined based on actually deployed conditions instead of via simulation with offline planning. ### Claim 15 (depends on 10) The method of claim 10, 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. ### Claim 16 (depends on 10) The method of claim 10, wherein the obtaining properties of the fiber includes an Optical Time Domain Reflectometry (OTDR) measurement to determine reflection and losses. ### Claim 17 (depends on 10) The method of claim 10, 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. ### Claim 18 (depends on 10) The method of claim 10, wherein the calibration is at full-fill spectral conditions on the amplified optical section. ### Claim 19 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, obtain power measurements of optical spectrum in the optical section, obtain properties of fiber in the amplified optical link, analyze the power measurements and the properties of the fiber to determine settings for the equipment for calibration thereof, and automatically cause configuration of the settings for the equipment. ### Claim 20 (depends on 19) The controller of claim 19, wherein 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.