Optical Amplifier Pump Laser Control Module Segmentation
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Solution Overview
Problem
Conventional optical amplifiers in submarine systems require redundant pump lasers and control electronics, leading to safety hazards and increased maintenance costs due to integrated components, where failure of either necessitates replacement of both, and the reliability of control electronics is lower than desired.
Innovation Solution
Separating pump lasers from their control electronics, allowing for independent replacement and integration with the EDFA, using a master/slave control module configuration to adjust operational parameters and maintain amplifier gain, eliminating the need for external optical connections and reducing maintenance time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pump lasers and control electronics are integrated and duplicated for redundancy, then reliability is improved, but maintenance complexity and safety hazards increase due to requiring replacement of both components together
Solution Approach 1:
The patent separates the control electronics from the pump laser assembly into distinct replaceable modules. The control electronics are housed in a control module that can be independently removed and replaced without affecting the pump laser or requiring optical fibre disconnection. This segmentation allows selective replacement of only the failed component (control electronics or pump laser), reducing maintenance complexity and eliminating safety hazards associated with optical fibre handling during control module replacement.
2Reliability
If pump lasers are duplicated for redundancy, then reliability is improved, but the number of components and replacement operations increases
Solution Approach 1:
By segmenting the control electronics into a separate control module with independent replacement capability, the system maintains redundancy while reducing maintenance time. When control electronics fail, only the control module needs replacement rather than the entire pump laser assembly, significantly reducing the time required for maintenance operations while preserving system reliability through the redundant pump laser configuration.
3Device complexity
If integrated control electronics are used with pump lasers, then device complexity is reduced, but ease of repair deteriorates when optical connections must be disconnected
Solution Approach 1:
The control module is designed as a self-contained unit with electrical connections only (no optical fibre connections required for control electronics replacement). This segmentation allows the control module to be easily plugged and unplugged from the pump laser assembly without disconnecting optical fibres, eliminating safety hazards and simplifying the repair process while maintaining manageable device complexity through modular design.
4Reliability
If redundant pump lasers are implemented, then reliability is improved, but the quantity of components increases
Solution Approach 1:
The control electronics are merged into a shared control module that can serve multiple pump lasers or be shared between redundant pump laser assemblies. This merging approach reduces the total quantity of control electronics components needed while maintaining reliability through the redundant pump laser configuration, as the same control module can be reused across different pump laser units.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enhances reliability by allowing separate replacement of control electronics without affecting optical pathways, maintaining amplifier performance, and extending pump laser lifetime through balanced operation, reducing maintenance time and costs while ensuring continuous signal strength.
Implementation Method 1
When the optical signal passes through an EDFA a pump is applied at a wavelength which causes excitement of the erbium atoms in such a way that there is consequent amplification of the optical signal
Data Source
Figure 1~2
Figure 3~4
AI summary
A method of adjusting the gain of an optical amplifier using a plurality of pump lasers controlled by a plurality of respective control modules, comprising the steps of: electing which of the control modules is a master control module; adjusting an operational parameter of the pump laser associated with the master control module towards the point at which the gain of the optical amplifier is equal to a predetermined ideal value; and, adjusting the operational parameter of each of the remaining pump lasers towards the point at which the operational parameters of all the pump lasers are equal.