摘要
太阳能是规模最大的可再生能源,为充分利用这一资源,太阳光直接抽运激光器是一种明智的选择。提出并搭建了采用两级会聚系统的太阳光抽运激光器系统。使用菲涅耳透镜作为大口径成像型第一级会聚系统,漫反射锥形聚光腔作为非成像型第二级会聚系统提高入射太阳光到工作物质的耦合效率。采用Nd:YAG晶体作为工作物质,获得了2.85 W的激光输出,从太阳光到激光的转换效率为0.43%。从菲涅耳透镜会聚效率、聚光腔内激光棒轴线上的功率分布等会聚系统方面和激光输出特性方面分析了该太阳光抽运激光器的性能;探讨了转换效率低的原因,并提出了相应的改进措施。
Solar energy is the most abundant renewable energy among all kinds of energy sources,solar pumped laser can be the best choice in terms of the fully utilization of solar energy.The solar pumped laser with two stage sunlight concentration system is designed and constructed.A Fresnel lens with large diameter is adopted as a primary optical concentration device,and a cone type diffuse pumping chamber functions as a secondary concentrator is used to enhance the couple efficiency between the incident solar power and laser media.Output laser power is up to 2.85 W,with the use of Nd：YAG crystal as laser media,and 0.43% optical conversion efficiency is achieved.The performance of solar pumped laser is discussed by the concentration efficiency of Fresnel lens and the power distribution along the axis of laser rod in the cavity,as well as the laser characteristic.The reasons for low efficiency are discussed,and improvement approaches are presented.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2011年第10期7-10,共4页
Chinese Journal of Lasers
基金
国家自然科学基金(60978029)资助课题
