Semiconductor Laser Module Wire Layout to Prevent Emission Crosstalk
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Solution Overview
Problem
Conventional semiconductor laser light source modules experience unnecessary laser light emission from adjacently positioned laser diodes when an emission signal is outputted to a single laser diode.
Innovation Solution
The semiconductor laser light source module is designed with a configuration where the first wires connecting the upper electrodes of the emission units with the package side electrodes are non-parallel in plan view, preventing electromagnetic coupling between adjacent emission units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If parallel wires are used to connect adjacent emission units, then electromagnetic coupling occurs between the wires, but using non-parallel wires increases manufacturing complexity
Solution Approach 1:
The patent applies asymmetry by configuring the first wires connecting adjacent emission units to be non-parallel in plan view. Specifically, when one first wire extends in a first direction, another first wire connecting an adjacent emission unit extends in a second direction that is not parallel to the first direction. This asymmetric arrangement prevents electromagnetic coupling between adjacent wires while maintaining manufacturing feasibility through defined directional constraints.
2Adaptability or versatility
If multiple emission units are arranged adjacently, then the module can emit laser light in multiple directions, but adjacent emission units cause unnecessary laser light emission when only one should be active
Solution Approach 1:
The patent extracts the harmful electromagnetic coupling effect by removing the parallel wire configuration that causes it. By taking out the parallel arrangement and replacing it with non-parallel wires, the unwanted electromagnetic interaction between adjacent emission units is eliminated, preventing unnecessary laser light emission while preserving the multi-directional emission capability.
Solution Approach 2:
The patent converts the potential harm of electromagnetic coupling into a benefit by deliberately designing non-parallel wire arrangements. This configuration uses the spatial relationship between adjacent emission units to its advantage, where the non-parallel orientation naturally reduces electromagnetic coupling and prevents crosstalk, turning what could be a harmful interference into a controlled design feature that ensures precise emission control.
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 configuration effectively suppresses undesired laser light emission by preventing electromagnetic coupling between first wires, ensuring efficient and directed laser light emission.
Implementation Method 1
preventing electromagnetic coupling between first wires
Data Source
AI summary
A semiconductor laser light source module includes an emission unit provided with an upper electrode and a lower electrode, emitting a laser light in one direction; a laser diode having a plurality of emission units arranged in a state where emission directions of the laser light are aligned; a plurality of package side electrodes that supply current to respective emission units; and a plurality of first wires that electrically connect respective upper electrodes of the plurality of emission units with the package side electrodes corresponding to the upper electrodes individually. One first wire that connects one emission unit in the arranged emission units with one of package side electrodes corresponding to the one emission unit, and the other first wire that connects the other emission unit adjacent to the one emission unit with one of package side electrodes corresponding to the other emission unit are non-parallel in plan view.