高分辨飞秒光学相干断层成像系统  

High Resolution Optical Coherence Tomography Using Femtosecond Ti:Al_2O_3 Laser

作　　者：贾亚青[1] 梁艳梅[1] 王明伟[1] 朱晓农[1] 

机构地区：[1]南开大学现代光学研究所

出　　处：《光电子．激光》2005年第4期409-412,共4页Journal of Optoelectronics·Laser

基　　金：科技部重大基础研究前期研究专项资助项目(2002CCA01700);教育部南开大学;天津大学科技合作基金资助

摘　　要：建立了飞秒激光自由空间光学相干断层成像(OCT)系统,给出了该系统的初步实验结果。系统的光源为掺Ti蓝宝石锁模激光器,输出脉宽小于50 fs,中心波长为800 nm,谱宽约为40 nm,飞秒OCT所达到的纵向分辨率为8μm,横向分辨率为7.6μm,并用于飞秒激光微加工样品表面轮廓的检测。How to achieve higher axial resolution is one of the technological challenges in optical coherence tomography (OCT), and this resolution mainly depends on the spectral bandwidth of light source. A high-resolution OCT system was demonstrated based on a free space femtosecond laser. The light source is a mode-locked Ti:sapphire laser that emits sub-50 fs pulses with a bandwidth of 40 nm. The preliminary results of our fs OCT system indicate a corresponding longitudinal resolution of 8 μm and a transverse resolution of 7.6 μm. Also this fs OCT was used in examining the surface profile of the femtosecond machining samples for the first time and the results were presented.

关 键 词：光学相干 断层成像系统 高分辨 锁模激光器 纵向分辨率 横向分辨率 激光微加工 自由空间 飞秒激光 中心波长 表面轮廓 蓝宝石 OCT 脉宽 谱宽 

分 类 号：TN248.35[电子电信—物理电子学] TH744.3[机械工程—光学工程]