Automatic Tester for High Power Diode Laser Bars

摘要

In optoelectronics diode lasers and especially diode laser bars are playing an important role for applications in high power diode lasers as well as diode laser pumped solid state lasers. Inside the manufacturing process of laser bar systems the electro optical test of laser bars is essential to sort out the good parts which fulfil the quality specified. An electro optical test station was developed and integrated which performs the so called LIV test. The voltage vs. current, the intensity vs. current and spectral distribution of each of the emitters can be measured and logged. The results will be evaluated and according to flexible parameter management the decision about acceptable quality is supplied automatically. The data will be processed by data base capabilities, hence this the system can be integrated into the general manufacturing data management. Due to the modular design of the test station it is capable to be integrated in a fully automated visual inspection and test system suitable for mass production as well as in a semi automated system which fits more the demands of R&D applications. The design of the test station, test results and a critical discussion of advantages will be presented.