自锁模超短脉冲激光输出的稳定性  

The stability of ultrashort pulse output in self mode-locked lasers

作　　者：庞春丽[1] 苏艳[2] 郑植仁[2] 

机构地区：[1]河北工业大学理学院,天津300130 [2]哈尔滨工业大学理学院,哈尔滨150001

出　　处：《激光技术》2007年第3期271-273,共3页Laser Technology

基　　金：河北省高校重点学科建设项目资助

摘　　要：为了研究非线性增益饱和效应对自锁模激光器超短脉冲输出的影响,采用L iapunov线性稳定性分析方法对描述自锁模激光输出的微分方程组进行了分析,得到了锁模定态存在的条件并讨论了各定态的稳定性。结果表明,当增益饱和能量小于一个特定值时,自锁模激光振荡器会同时存在两个锁模定态,其中能量较小的一个是稳定的,而且随着增益饱和能量的增大,此稳定自锁模态的能量增大、脉宽变窄,它应该是自锁模激光振荡器实际工作的状态。In order to discuss the influence of the nonlinear gain saturation on the ultrashort pulses generated from self mode-locked lasers,the differential equations describing the output of this kind of lasers were analyzed by means of Liapunov linear stability theory. It was found that two stationary self mode-locked states appear simultaneously in the laser when the gain saturation energy is lower than a critical value. Only the state with lower energy is stable. With the gain saturation energy increasing, the energy of the stable stationary state increase and its pulse width is shortened, and it should be the working state of the self mode-locked lasers.

关 键 词：非线性光学 增益饱和能量 Liapunov线性稳定性理论 定态 

分 类 号：O437.4[机械工程—光学工程]