Optical Power Tool for Channel Equalization
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Solution Overview
Problem
Configuring amplified optical links, particularly those using 400G QSFP-DD transceivers, is complex due to wide power distribution and gain ripple, limiting performance and requiring cumbersome manual or iterative automated processes, which are resource-intensive and error-prone.
Innovation Solution
An optical power tool that employs power pre-emphasis at the transmitter side and channel monitoring to equalize signal-to-noise ratio (SNR) distribution, generating adjusted channel power values to maximize transmitter power and reduce SNR variation, thereby optimizing the optical link configuration without iterative procedures or machine learning algorithms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual or iterative automated configuration processes are used to set optical transceiver and amplifier power, then the system can be configured, but the process becomes complicated and time-consuming
Solution Approach 1:
The system performs preliminary actions by automatically measuring optical power levels and calculating adjusted power values before final configuration. The controller measures actual optical power at monitoring points, compares it with target values, and pre-calculates the necessary power adjustments for both transceivers and amplifiers, eliminating the need for time-consuming iterative manual adjustment
Solution Approach 2:
The system implements feedback mechanisms where the controller continuously monitors optical power levels at monitoring points along the link, compares measured values against target values, and automatically adjusts transmitter and amplifier power settings. This closed-loop feedback enables rapid convergence to optimal configuration without manual intervention
2Productivity
If power pre-emphasis and channel monitoring are implemented to equalize SNR distribution, then transmission capacity is maximized, but device complexity increases
Solution Approach 1:
The optical power tool is designed as a multi-functional system that simultaneously performs power measurement, SNR calculation, equalization computation, and configuration generation. By consolidating these functions into a single integrated tool rather than separate devices, the system maximizes transmission capacity while controlling overall device complexity
Solution Approach 2:
The system optimizes transmission capacity by dynamically changing power parameters across multiple channels. The controller calculates adjusted power values for each channel based on measured optical power and target SNR, then generates configuration settings that equalize the power distribution. This parameter optimization enables maximum transmission capacity while the automated calculation process manages the complexity
Data Source
AI summary
A power tool for obtaining a channel equalization and improving the signal to noise ratio in an amplified optical link. A controller obtains a plurality of optical channel power values for a plurality of channels used for transmitting optical signals on an optical link by a plurality of optical transmitters. The optical channel power values are obtained by monitoring power at an input or an output of an amplifier on the optical link. The controller then determines a power distribution among the plurality of channels based on a maximum optical power and a minimum optical power from the plurality of optical channel power values and generates a plurality of adjusted channel power values by equalizing and scaling the plurality of optical channel power values. The controller configures the plurality of optical transmitters for transmitting the optical signals on the optical link based on the plurality of adjusted channel power values.