相变散热技术在小型高效半导体抽运激光器中的应用研究

Application Research of Phase Change Material Heat Removal Technology for Compact High Efficiency Diode Pumped Laser

二极管抽运固体激光器(DPSSL)热管理技术是决定其小型化、插头效率和光束质量等性能的关键因素之一。研究了基于低熔点液态金属镓合金相变材料的二极管抽运激光器(DPL)温控技术。对比实验研究结果表明,与体积更大的风冷肋片散热器相比,相变材料散热器能使激光器在高温55℃环境中正常工作时间从1 min延长到6 min、制冷功耗减小到46%、散热分系统体积减小到53%,并使激光器系统的插头效率由3.02%提高到3.77%。理论计算和有限元仿真模拟再现了液态金属相变过程中温度变化规律,再次表明液态金属相变材料散热器具有功耗低和体积小等优势。为拓展液态金属相变材料在激光器热管理领域的应用奠定了理论和实验基础,具有重要的工程应用价值。

Heat management has become one of the key techniques for diode pumped solid state laser′s （DPSSL） performances, such as compact, plug-in efficiency and beam quality. The heat management technology for DPSSL based on low-melting-point Gallium alloys phase change material （PCM） is studied. Experimental result proves that, compared with air-cooled heat radiator, PCM heat radiator can extend laser working hours to six times longer, decrease cooling power to 46% and radiator′s volume to 53%, and improve the plug efficiency from 3.02% to 3.77%. Furthermore, the finite element software ANSYS has been used to simulate the temperature distribution of PCM radiator. The simulated result indicates that PCM has advantages such as low cooling power and small volume. The results provide the theoretical and experimental basis in laser heat management using liquid metal, and has important engineering application value.