Proceedings of the Optical Society of Korea Conference (한국광학회:학술대회논문집)
- 2009.02a
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- Pages.361-362
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- 2009
Generation of a 60-as Pulse Train from High Harmonic Generation
고차조화파를 이용한 60 아토초 펄스열 생성
Abstract
High-order harmonics from gaseous atoms driven by an intense femtosecond laser pulse can form an attosecond pulse train. By selecting suitable harmonic generation conditions, the harmonic spectrum can be broad enough to form sub-hundred attoseconds. One serious limitation, however, comes from the inherent attosecond chirp originating from the harmonic generation process. We have proposed to compensate for the positive attosecond chirp by making use of negative group delay dispersion of a metallic x-ray filter or a gaseous medium. We generated 240-as pulses from neon and compressed them to 60 as after propagating through argon, close to the transform-limited duration of 47 as.
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