论文部分内容阅读
在固体激光器中,热效应会同时影响抽运光和振荡光的空间分布。研究表明,对于端面抽运固体激光器而言,通常存在一个特定的抽运功率区间,使抽运光与基模振荡光在热效应的作用下,在增益介质内部高度重合,激光器的抽运光效率和光束质量得到大幅度提升。利用这一特点,设计了一种激光器,在抽运功率为105~115 W时,实现了抽运光与基模振荡光空间分布的高度重合,激光器光束质量因子小于2.3。在此区间外,激光器光束质量因子迅速增加到3以上。提出了一种计算上述抽运功率区间的优化算法,在端面抽运固体激光器中,可以快速寻找到理想的抽运功率区间,并与上述实验进行对比,结果表明使用该方法寻找到的抽运功率区间与实验所得到的区间高度吻合,相对误差低于5%,可靠性高。
In solid-state lasers, the thermal effect affects both the spatial distribution of the pump light and the oscillating light. The research shows that for the end-pumped solid-state lasers, there is usually a specific pumping power range, so that the pumping light and the fundamental mode oscillation light are highly coincident in the gain medium due to the thermal effect, and the pumping light efficiency And the beam quality has been greatly improved. Using this feature, a laser was designed to achieve a high degree of coincidence of the spatial distribution of the pump light and fundamental mode oscillation light at a pump power of 105-115 W, with a laser beam quality factor of less than 2.3. Outside this interval, the laser beam quality factor rapidly increases above 3. An optimization algorithm for calculating the above pumping power range is proposed. In the end-pumped solid-state laser, the ideal pumping power range can be quickly found and compared with the above experiment. The results show that the pumping method The power range is in good agreement with the experimentally obtained range, the relative error is less than 5%, and the reliability is high.