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使用具有偏振吸收偏振发射等优良光学性能的Nd:YVO4为工作物质,通过选用880nm激光二极管泵浦,降低量子亏损,提高效率,降低阈值和热效应,分析了谐振腔长度和反射率对单纵模线宽的影响,合理设计热稳定四镜环形腔。基于磁旋光玻璃MR3-2外加永久磁铁的法拉第旋转器,结合1/2波片和工作物质的偏振发射特性构成单向器,获得激光器单向运转。在泵浦功率为5 W时,获得了输出功率2.75 W,效率55%,斜效率65%,线宽66.7 MHz的1 064nm激光的稳定单频运转,2小时功率稳定度优于0.2%。
By using Nd: YVO4 with excellent optical properties such as polarization-absorbing polarization emission as the working substance, the choice of 880nm laser diode pump to reduce quantum loss, increase efficiency and reduce threshold and thermal effects is analyzed. The effects of cavity length and reflectivity on single- The effect of line width, reasonable design of the four-ring thermal stability of the cavity. A Faraday rotator based on a magnetic rotating glass MR3-2 with a permanent magnet is combined with the polarization emission characteristic of the 1/2 wave plate and the working substance to form a unidirectional device to obtain a unidirectional operation of the laser. When the pump power is 5 W, the output power of 2.75 W, efficiency of 55%, slope efficiency of 65% and line width of 66.7 MHz are obtained. The stable single-frequency operation of 1 064nm laser with 2-hour power stability is better than 0.2%.