多棒串接固体激光器谐振腔的研究  

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

作　　者：席再军[1] 郑启光[1] 秦应雄[1] 余本海[1] 童杏林[1] 

机构地区：[1]华中科技大学激光技术国家重点实验室,武汉430074

出　　处：《物理学报》2003年第6期1396-1402,共7页Acta Physica Sinica

摘　　要：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fm 时 ,稳定性条件 0 <G1 G2 <1几乎总是满足 (除了几个奇异点外 ) ,而且热焦距f值在小于这个下限值fm 时 ,谐振腔进入深度非稳区 ,这个下限值fm 由棒间距L和棒数n决定 ,其表达式为fm =0 .2 5L(当 2≤n≤ 10 )Resonator parameters and thereto-stability conditions for plane-plane resonator of multi-rod series connection solid-state lasers were investigated by means of matrix 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-stability 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 spacing ( L) between two neighbouring laser rods are given and a symmetry configuration ( L-1 = L-2) is adopted, then every stability area reaches a largest extent. If the condition ( L-1 = L-2 = L/2) is supposed in plane-plane resonator and the thereto focus length (f) is greater than a lower limit value (f(m)), the stability condition (0 < G(1) G(2) < 1) is almost satisfied except several oddity values. Furthermore, when the thermo focus length (f) is smaller than the lower limit value (f(m)), the resonator come into a deep non-stability area. The lower limit value (f(m)) is determined by the number ( n) of laser rods and the spacing ( L) between two rods, the formula is f(m) = 0.25 L (if 2 less than or equal to n less than or equal to 10).

关 键 词：多棒串接固体激光器 谐振腔 矩阵光学 热稳条件 稳定区 

分 类 号：TN248.1[电子电信—物理电子学]