针对大功率激光二极管(LD)的冷却需求,基于沸腾-空化耦合效应,以及场协同理论,研制了一种微通道两相冲击强化相变热沉,封装腔长1.5 mm的LD线阵。实验测试了连续功率LD输出0~100 W时的电-光转换效率以及电流-输出功率等特性,冷却工质采用R134a,磁驱齿轮泵电机转速23 Hz时热沉热阻为0.211℃/W。结果显示微通道相变热沉具有良好的取热能力,能够满足大功率LD的散热要求。与改进前的热沉相比,基于场协同理论优化了的两相冲击热沉,热阻明显下降。 Aiming at the cooling demand of high power laser diode (LD), a kind of micro-channel two-phase impact enhanced phase change heat sink was developed based on the coupling effect of boiling and cavitation and the field synergy theory. Experiments were carried out to test the electrical-optical conversion efficiency and current-output power when the continuous power LD output was 0-100 W. The cooling medium was R134a. The thermal resistance of the heat sink was 0.211 ℃ / W . The results show that the micro-channel phase change heat sink has a good ability to take heat to meet the cooling requirements of high-power LD. Compared with the pre-heat sink, the thermal resistance of the two-phase impact heat sink optimized based on the field synergy theory is obviously decreased.