Bidirectional Optical Module Backward Compatibility Mode
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Solution Overview
Problem
Conventional bidirectional optical modules with different baud rates and wavelength capabilities are incompatible, complicating their deployment in optical networks and limiting communication capacity.
Innovation Solution
A programmable optical module that can operate in either a normal mode with maximum communication capacity or a legacy mode with reduced capacity, compatible with older modules, by selectively configuring wavelengths and baud rates, allowing for backward compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional bidirectional optical module transmits and receives wavelengths at a high baud rate to achieve full-duplex communication, then communication capacity is improved, but compatibility with legacy optical modules deteriorates
Solution Approach 1:
The optical module dynamically switches between operational modes (legacy mode and full-duplex mode) based on the detected capability of the connected optical module. The controller adjusts the number of wavelengths and baud rates in real-time, enabling the system to adapt from 100 Gbps to 400 Gbps communication capacity as needed, thus resolving the contradiction between high capacity and compatibility
Solution Approach 2:
The system changes key operational parameters including the number of active wavelengths and baud rate depending on the operational mode. In legacy mode, fewer wavelengths are used with lower baud rates, while in full-duplex mode, more wavelengths are used with higher baud rates, allowing the same hardware to serve different compatibility requirements
2Productivity
If a programmable optical module is configured to operate in normal mode with maximum communication capacity, then productivity is improved, but device complexity increases
Solution Approach 1:
The optical module performs self-configuration through an automated detection process. The controller automatically detects the capability of the connected optical module and configures the appropriate operational parameters without manual intervention. This self-service approach enables the system to achieve maximum capacity when needed while avoiding the complexity of manual configuration
Data Source
AI summary
At a controller of an optical module including optical transmitters and optical receivers coupled to the controller and coupled to first and second optical fibers: responsive to a first command, first configuring the optical module to operate in a normal mode in which the optical module operates at a maximum communication capacity by transmitting and receiving a maximum number of wavelengths, that the optical module is capable of transmitting and receiving, on each of the first optical fiber and the second optical fiber; and responsive to a second command, second configuring the optical module to operate in a backward compatible legacy mode in which the optical module operates at a reduced communication capacity compatible with a legacy optical module by transmitting and receiving a reduced number of wavelengths, that is less than the maximum number of wavelengths, on each of the first optical fiber and the second optical fiber.