Study On Temperature Model And Testing Of High-Power Semiconductor Laser Arrays

High-power semiconductor lasers have the properties of high converting efficiency, high dependability and much longer life, so they are widely used in the fields of pumping solid lasers, printing, processing the material and communicating. Although semiconductor lasers have high converting efficiency, there is still much electric power that is converted to heat, which leads to higher knot temperature on the laser diode. And temperature rising will result in the increasing of threshold current , the moving of wavelength to infrared, the changing of mode and the increasing of inside objection, which will influence the life of the apparatus badly.In this article, firstly we have analysed the influence of the temperature to the properties of the lasers, by the hands of theory and testing data. Secondly, we have analysed the thermal fountain distribution, thermal resistance and thermal power based on the basic conception. The important part of this article is to simulate the stable and transient thermal distribution using the Analysis system (ANSYS) software. The ANSYS software is a software that based on the theory of finite element, and it can be used in the fields of configuration analysis, thermal analysis, electromagnetic analysis, fluid analysis and couple field analysis.Another important part of this article is to prove the simulating result by the method of test. Based on the testing theory, there are two kinds of testing methods for testing the rising temperature. The first one uses the trait that the electric or optic parameters of semiconductor lasers can change with the temperature. This method only gives the average temperature according to one of the parameter's changing with the temperature. The other one uses some conventional testing method to test the facet temperature of the semiconductor lasers. In this article, we used the first method to test the stable thermal resistance, and we introduced some testing methods to test the parameters of semiconductor lasers.In the last part, we introduced the technology of optimizing the thermal parameters and dispersing heat. In this part, we can see the aim to analyse and simulate the thermal character, and that also is the important part to be considered when designing the chip and heatsink.