紧凑型像散补偿的克尔透镜锁模腔

对紧凑型克尔透镜锁模腔的特性进行理论研究，运用ABCD定律得到优化的折叠角，从而保证晶体中的光束为高斯基模，建立含克尔介质在内的三镜腔的光线矩阵，以此计算CW和KLM运转状态下腔的稳定性条件、腔内某些位置的光束半径，以及输出镜处的克尔强度与内腔等效距离的关系，计算结果表明，当激光器工作于稳定区的远端边缘时，才能实现稳定的克尔透镜锁模。

A Study on a Compact Kerr-Lens Mode-Locking Resonator with Astigmatic Compensation

A theoretical study is devoted to the characteristic of a compact type kerr lens mode locking(KLM)resonant cavity. By using ABCD law, an optimised folding angle is obtained and the ray in crystal is thus ensured to be Gaussian fundamental mode. A ray matrix of three mirror cavity containing kerr media is formed, with which a series of calculations can be performed. These calculations include stability condition of the cavity in CW and KLM operation state; beam radius in some intracavity location;and relation between Kerr intensity at the output mirror and equivalent distance of inner cavity. As shown by the reckoning, only in the time when the laser operates at distant edge of stable region can the stable kerr lens mode locking be realized.