摘要
设计了中心波长800 nm带宽约500 nm的啁啾镜对,在550—1050 nm波长范围内提供约60 fs2群延迟色散(group delay dispersion,GDD),通过啁啾镜对的形式使GDD振荡波纹由单个啁啾镜的±100 fs2减小到±20 fs2.采用双射频离子束溅射方法进行制备,用白光干涉仪进行色散性能测试,从测试结果可以看出,制备的啁啾镜的反射率、GDD性能和设计值符合得比较好.制备出的550—1050 nm超宽带啁啾镜对在钛宝石激光器腔外进行色散补偿,原输入脉冲由24—27 fs压缩到12 fs,这是国产超宽带啁啾镜对的首次应用.
The chirped mirror (CM) pair is designed to provide group delay dispersion (GDD) of around?60 fs2 with bandwidth 500 nm at a central wavelength of 800 nm. The GDD oscillation decreases from ±100 fs2 to ±20 fs2. CM pair is fabricated using ion beam sputtering. The GDD is determined by using a white light interferometer. The measurement results show that the manufactured CM can meet our requirements. By balancing the extra-cavity dispersion with the fabricated chirped mirrors, the pulse 24-27 fs is compressed to 12 fs.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2013年第20期249-252,共4页
Acta Physica Sinica
关键词
超快激光
啁啾镜对
群延迟色散
色散补偿
ultrafast laser
chirped mirror pair
group delay dispersion
dispersion compression