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掺钕钒酸钇作为一种重要的激光增益介质,以其受激发射截面大、对809 nm波长存在很强的宽吸收带、偏振发射等优点,在LD端面泵浦全固态激光器中得到了广泛的应用,其中比较有应用价值的受激发射谱线为1 064 nm,1 342 nm和914 nm。由于914 nm谱线属准三能级结构,以及钒酸钇晶体较低的热导率,限制了其向大功率方向的发展。研究了一种具有较高效率的大功率钒酸钇连续输出激光器,通过采用简单的折叠腔设计和对腔镜镀适当的介质膜,抑制了波长为1 064 nm和1 342 nm的高增益谱线。当泵浦功率为29W时,输出功率高达6.5W,斜效率为37.9%,光光转换效率为22.4%.
Nd: YVO3, as an important laser gain medium, has been widely used in LD end-pumped all-solid-state lasers due to its strong emission cross section, strong absorption band at 809 nm and polarization emission A wide range of applications, including more useful stimulated emission lines for 1 064 nm, 1 342 nm and 914 nm. Due to the quasi-three-level structure of the 914 nm line and the lower thermal conductivity of the yttrium vanadate crystal, its development toward high power is limited. A high efficiency yttrium vanadate output laser with high efficiency was studied. By using a simple folded cavity design and proper mirror coating of the cavity mirror, the high gain spectra of 1 064 nm and 1 342 nm were suppressed line. When the pump power is 29W, the output power is up to 6.5W, the slope efficiency is 37.9% and the light-to-light conversion efficiency is 22.4%.