高效全固体脉冲蓝光系统实验研究

用半导体抽运的Q-YLF倍频激光器抽运钛宝石产生830nm的纳秒红外光，再用LBO晶体对该光 产生二次谐波得到415nm的脉冲蓝光.用3Ｗ的YLF抽运时可产生960mW基波光，效率达32%；经 倍频后输出285mW的蓝光，倍频效率可达322%.对影响倍频效率的主要因素如基波光源腔型 设计、聚焦效果、脉冲宽度等作了较详细的研究.关键词：全固体倍频蓝光

EXPERIMENTAL STUDY OF HIGH EFFICIENCY ALL-SOLID-STATE PULSED-BLUE LASER SYSTEM

The infrared (λ₀=830nm)nanosecond pulse is generated by pumping Ti:s apphire with diode-Q-YLF laser, and then the second-harmonic blue laser (λ ₀=415nm)is obtained by frequency-doubling with the crystal Li BO_{20(LBO). In our experiments, the fundamental wave with a power of 960mW and cor responding harmonization of 285mW are output from the laser system when pumping power is only 3W. The high fundamental conversion efficiency of 32% and the seco nd harmonic conversion efficiency of 322% are reached, by optimizing the desig n of Ti:sapphire laser system and the focusing system in frequency-doubling. The influences of the bandwidth, the polarization and the focusing of the fundament al wave on the second-harmonic generation are discussed.}