Project profile: Semiconductor Laser Diode Test Equipment.
Black Box Technologies was hired for this long-term project to develop multiple test station capability for the characterization, life-test, and burn-in of semiconductor laser diodes. We provided the custom built hardware to drive these diodes with clean, stable, and safe constant current.
These are high power lasers and require several amps of current for single devices and tens of amps for laser arrays. These driver electronics and associated computer interface electronics all conform to the ANSI Standard for Laser Safety. Each test system adheres to strict interlock and control functionality. The life-test and burn-in stations were designed for 24-hour operation to control each laser independent of the others in constant current or constant power modes. Power, current, and voltage data is taken in user defined time increments, stored, displayed, and analyzed for any degradation.