多棒串接固体激光器谐振腔的研究

运用矩阵光学的方法对多棒串接固体激光器的谐振腔参数及其在平平腔时的热稳条件进行了研究，并计算了六棒串接平平腔固体激光器的稳定区.结果证明：多棒串接固体激光器的稳定区和非稳区相互间隔，在平平腔总腔长、激光棒数量n和棒间距L一定的条件下，当采用对称结构时(L₁=L₂)，则谐振腔的每段稳定区均达到最大；且只要 平平腔满足L₁=L₂=L/2以及热焦距f在大于某个下限值f_m时，稳定性条件01< 关键词： 多棒串接固体激光器 稳定区 热稳条件

A study on the resonator of multi-rod series connection solid-state lasers

Resonator parameters and thermo-stability conditions for plane-plane resonator o f multi-rod series connection solid-state lasers were investigated by means of m atrix optics.Stability areas of six-rod-connection solid-state lasers in a plane -plane resonator were calculated.The results show that stability areas and non-s tability areas of the multi-rod series-connection solid-state lasers distribute alternately.If the length of the resonator,the number(n) of laser rods and the s pacing (L) between two neighbouring laser rods are given and a symmetry configur ation (L₁=L₂) is adopted,then every stability area reaches a largest extent. If the condition (L₁=L₂=L/2) is supposed in plane-plane re sonator and the th ermo focus length (f) is greater than a lower limit value (f_m),the st ability c ondition (01G₂<1) is almost satisfied except several odd ity values.Further more,when the thermo focus length (f) is smaller than the lower limit value (fm),the resonator come into a deep non-stability area.The lower limit va lue (f_m) is determined by the number (n) of laser rods and the spacin g (L) between two rods,the formula is f_m=0.25L(if 2≤n≤10).