声光偏转器扫描飞秒激光的时间色散补偿  

Compensation of temporal dispersion for acousto-optical deflector scanning femtosecond laser

作　　者：李德荣[1] 吕晓华[1] 吴萍[1] 骆清铭[1] 陈伟[2] 曾绍群[1,2] 

机构地区：[1]生物医学光子学教育部重点实验室,华中科技大学,武汉430074 [2]耶鲁大学神经生物学系,newhavenct06511

出　　处：《物理学报》2006年第9期4729-4733,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:30370463;60278017;30328014);国家973计划(批准号:2004CB520804)资助的课题.~~

摘　　要：研究了声光偏转器（AOD）扫描飞秒激光的时间色散效应及补偿方案。在800nm波长处，单个AOD引入的群延时色散（GDD）可达-9300fs^2．在深入分析AOD和棱镜角色散原理的基础上，提出了用色散棱镜预补偿AOD对飞秒脉冲的时间色散，并进行了实验证实．在AOD中心频率处（70MHz），将398fs的脉冲压缩到122fs，且整个带宽范围内（50MHz--90MHz）脉宽变化范围为120fs-180fs．这表明该方案用于AOD扫描飞秒激光时进行时间色散补偿是非常有效的。The temporal dispersion effect and compensation approach of femtosecond laser scanning by an acousto-optical deflector （AOD） was studied. The group delay dispersion （GDD） of a single AOD at 800nm wavelength is about 9300fs^2. Based on the principle of angular dispersion of AOD and the prism, an approach that uses single prism pre-compensating an AOD for the temporal dispersion was designed and demonstrated by experiments. At center frequency （70MHz） of the AOD, a 398fs pulse is compressed to 122fs, the range of pulse width on the entire bandwidth （50MHz--90MHz） is 120fs--180fs. This approach is demonstrated to be effective on compensation of temporal dispersion for AOD scanning femtosecond laser.

关 键 词：飞秒激光 声光偏转器 时间色散 脉冲压缩 

分 类 号：TN241[电子电信—物理电子学]