不同脉宽激光和频产生蓝色超短激光的模拟研究  

Ultra-short blue laser generation by sum-frequency of two lasers with different pulse width

作　　者：孔艳[1,2] 陈险峰[3] 朱拓[4] 高淑梅[1] 

机构地区：[1]江南大学理学院光信息科学与技术系,无锡214122 [2]江南大学物联网工程学院,无锡214122 [3]上海交通大学物理系,上海200240 [4]河海大学理学院,南京210098

出　　处：《激光技术》2012年第1期134-137,共4页Laser Technology

基　　金：国家自然科学基金资助项目(60908041);中国博士后科学基金资助项目(20080440153);江苏省博士后科研计划资助项目(0802021C)

摘　　要：为了扩展现有飞秒激光的波段,采用非周期的准位相匹配光学超晶格进行了两束激光的和频研究。光学超晶格的结构由遗传算法根据要求模拟计算得到,在此结构晶体上进行平顶长脉宽激光与飞秒激光和频,可以有效地抑制和频光的脉宽展宽,生成457nm的蓝色飞秒激光。结果表明,该技术提供了一种通过两束不同激光和频产生新波长超短脉冲激光的全新技术方案。In order to get new femtosecond-laser, an aperiodic poled optical superlattice was employed during the sum- frequency generation process. The optimized structure of the quasi-phase matching optical superlattice was studied by means of the genetic algorithm. Femtosecond blue-light laser at 457nm can be generated through femtosecond pulse mixed with top-hat pump pulse in the aperiodic optical superlattice. The simulation results indicate that this technique give a new scheme for generating a new ultra-short laser through nonlinear frequency conversion.

关 键 词：非线性光学 超短脉冲 和频 准位相匹配 光学超晶格 

分 类 号：O437[机械工程—光学工程]