Optical Assembly Thermal Path Segmentation for Laser Diode Inductive Losses
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High frequency oscillation of laser diodes leads to inductive losses and significant heat dissipation, which existing thermal management solutions struggle to efficiently address, often resulting in increased operating temperatures and reduced thermal efficiency.
Innovation Solution
The optical assembly positions the laser diode package on one side of the printed circuit board and the driver on the other, with a coupler providing separate thermal paths for heat dissipation around the edge of the board to a spaced heat sink, reducing inductive losses and maintaining low thermal resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the laser diode and driver are positioned close together, then inductive losses are reduced, but thermal management becomes more difficult and operating temperature increases
Solution Approach 1:
The patent divides the thermal management system into separate thermal paths: one for the laser diode (through the coupler's thermal conductor) and one for the driver (through the circuit board to heat sink). This segmentation allows each component to be cooled independently, enabling close positioning for low inductance while maintaining effective thermal management for both components.
2Device complexity
If a single thermal path is used for both laser diode and driver, then device complexity is reduced, but thermal efficiency decreases and heat dissipation becomes insufficient
Solution Approach 1:
The patent merges the thermal management functions by having both the laser diode and driver share a common heat sink, while maintaining separate thermal paths to the heat sink. This combination approach provides efficient heat dissipation for both components without requiring completely independent cooling systems, balancing thermal efficiency with device complexity.
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 enhances thermal efficiency, reduces inductive losses, and allows for EMI shielding, potentially eliminating the need for thermoelectric coolers, thereby increasing cost-effectiveness and improving optomechanical pointing accuracy.
Implementation Method 1
the coupler configured to provide a second, different thermal path for conducting heat from the laser diode package
Implementation Method 2
a heat sink coupled to the laser diode driver, the heat sink configured to provide a first thermal path for conducting heat from the laser diode driver
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
Embodiments are disclosed that relate to reducing inductive losses and controlling driver and laser diode temperatures in an optical assembly (500) comprising a laser diode. For example, one disclosed embodiment provides an optical assembly (500) comprising a printed circuit board (502), and a laser diode package (506) and laser diode driver (520) mounted to the printed circuit board (502). Further, a heat sink (524) is coupled to the laser diode driver (520) and configured to provide a first thermal path for conducting heat from the laser diode driver (520). Additionally, a coupler (504) may further be coupled to the laser diode package (506) and printed circuit board (502), wherein the coupler (504) is configured to provide a second, different thermal path for conducting heat from the laser diode package (506).