太阳能光伏LD抽运的近红外低阈值激光器

Efficient conversion of incoherent sunlight to coherent laser light has been pursued. This project mainly studies the low threshold Tm-doped laser bumped by solar photovoltaic semiconductor laser diode(LD),which employ a range of techniques including the solar photovoltaic technique, LD power supply design, all-solid-state laser technique and low threshold cavity design. Theoretically, Optimum matching point between photovoltaic cells maximum output power and LD operation power is studied, and the effect of the solar cell efficiency, LD coupling efficiency,crystal parameter,intracavity loss and laser cavity parameter upon the laser threshold and efficiency are further analyzed. Experimentally, choose fit multi- junction photovoltaic cells with larger overlap with solar spectrum,design photovoltaic circuit that meets impedance matching condition and a low pumping threshold cavity, finally achieve continuous and mode-locked operating of LD-pumped Tm-doped laser.

将非相干太阳光转换为相干激光输出，一直是人们追求的目标之一。本项目基于太阳能光伏技术、半导体激光器（LD）电源设计技术、LD抽运全固态激光器技术、低阈值激光器设计等技术全方位研究太阳能光伏LD抽运的全固态掺铥低阈值激光器。理论上，确定光伏最大功率输出点与LD运转点的最佳匹配，研究太阳能电池效率、LD耦合效率、晶体参数、腔内损耗、激光谐振腔参数对激光阈值及出光效率的影响；实验上，选择与太阳光谱匹配的多节光伏电池，设计阻抗和LD匹配的光伏电源电路，实现LD最佳抽运耦合方式，设计合理的低阈值激光腔，得到光伏LD抽运的近红外激光器连续和锁模输出。

将非相干太阳光转换为相干激光输出，一直是人们追求的目标之一。本项目主要研究了太阳能驱动808nm/790nmLD泵浦的低阈值掺铷和掺铥激光器，研究内容涉及太阳能光伏技术，LD电源技术，全固态激光技术及低阈值腔设计技术。从理论上研究了光伏电池最大输出功率与LD工作功率的最佳匹配点，并进一步分析了LD耦合效率、晶体参数、腔内损耗和激光腔参数对激光器阈值和效率的影响。实验上，选择了商业化高的单晶光伏电池，设计满足阻抗匹配条件的光伏电路和低泵浦阈值腔，最终实现LD泵浦掺铥和掺铷激光器的近红外波杜连续运转和锁模运转。