根据目前多数高功率半导体激光器模块只适合工作在准连续（QCW）状态下的特点，提出了利用光谱方法测量半导体激光器温升进而计算得到热阻的计算方法。该方法具有简单、直观、快捷的特点，同时避开了常规计算热阻方法要求半导体激光器工作在连续状态的局限性。其中在不同占空比、同一工作电流下得到的热阻值一致性较好，更接近文献给出的数值，具有实际应用价值。

According to the characteristics of most high power laser diode array/stacks only working at quasi continuous wave(QCW), the calculation method of temperature rising by measuring the spectra for thermal resistance calculation is recommended, which is simple, direct, and fast. Requirements of continuous wave operation which are conventionally needed at calculating the thermal resistance are avoided. The thermal resistance, which is calculated at different duty cycles and the same working current is, well consistent and closer to the values given in previous references. The calculation methods have actual application values in manufacture process.