Automated Laser Diode Testing with Temperature Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current laser diode testing is manual, time-consuming, and lacks temperature simulation of real-world conditions, leading to increased production costs and potential in-field failures.
Innovation Solution
A temperature-controlled automated system with a motor-driven translation platform, thermoelectric cooler, and fluid system for simulating various temperatures, along with an auto-aligning probe card and lens assembly for efficient and reliable testing of laser diodes mounted on submounts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual testing is used for laser diodes, then operator flexibility is maintained, but testing time increases and productivity decreases
Solution Approach 1:
The system enables self-service automated testing where the laser diode is automatically positioned, connected, and tested across multiple temperatures without operator intervention. The automated positioning system and temperature-controlled chambers work autonomously to complete the testing sequence, eliminating manual operations while maintaining testing quality.
2Reliability
If testing is performed before mounting to submount, then testing setup is simpler, but real-world operating conditions are not simulated
Solution Approach 1:
The system performs preliminary mounting of the laser diode to the submount assembly before testing begins. This preliminary action ensures the device is in its final operational configuration, allowing subsequent temperature cycling and performance testing to accurately reflect real-world conditions without requiring remounting or reconfiguration.
Solution Approach 2:
The system adds the temperature dimension to the testing process by implementing multiple temperature-controlled chambers that can independently set and maintain different temperatures. This dimensional addition allows simultaneous testing at various temperatures, accurately simulating real-world thermal conditions while managing system complexity through modular chamber design.
3Adaptability or versatility
If single-temperature testing is used, then testing process is simpler, but temperature variations in real-world operation are not accounted for
Solution Approach 1:
The temperature control system is segmented into multiple independent chambers, each capable of maintaining a specific temperature. This segmentation allows the system to test at multiple temperatures simultaneously or sequentially without requiring a single complex temperature control mechanism, managing complexity through modular independent units.
Solution Approach 2:
Each temperature-controlled chamber is designed as a universal testing environment that can accommodate different laser diode configurations and perform various types of electrical and optical testing. This multi-functionality reduces overall system complexity by using standardized chambers rather than specialized setups for each temperature point.
4Productivity
If automated testing is implemented, then productivity increases, but initial system cost increases
Solution Approach 1:
The automated system enables continuous testing operations where multiple laser diodes can be tested in sequence without interruption. The automated positioning, connection, and temperature cycling mechanisms operate continuously, maximizing productivity while the modular architecture keeps system complexity manageable through standardized reusable components.
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
The system enables rapid, automated testing of laser diodes at multiple temperatures, reducing human involvement and improving reliability, leading to fewer in-field failures and lower production costs.
Implementation Method 1
The temperature control system includes a thermoelectric cooler and a fluid system for circulating a cooling/heating fluid
Implementation Method 2
a fluid system for circulating a cooling/heating fluid in a circulation block
Implementation Method 3
a fluid system for circulating a cooling/heating fluid in a circulation block
Data Source
AI summary
A temperature-controlled system for testing a laser die mounted on a submount is disclosed. The testing system comprises a base having a motor-driven translation platform. The translation platform includes a first testing site having a two-stage temperature control system mounted on a base portion. The temperature control system includes a thermoelectric cooler and a fluid system for circulating a cooling/heating fluid in a circulation block. A mounting portion is also included on the first testing site on which the submount is positioned. The temperature of the mounting portion is controlled by the temperature control system. A probe card having an arm and an electrical contact portion attached to the arm provides a power supply to the submount when the first testing site is aligned with the probe card. An aligner having a lens assembly that is alignable with the first testing site receives an optical signal produced by the laser.