Enhanced two-color high-harmonic generation achieved by adding an extra gas medium

The high-harmonic generation in a two-color laser field, consisting of a 30-fs Ti:Sapphire laser pulse and its second harmonic, could be enhanced by installing an extra gas medium of Ar in front of the harmonic generation medium of He. The effects of the extra medium were examined by analyzing harmo...

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Bibliographic Details
Published in:Applied physics. B, Lasers and optics Lasers and optics, 2015-09, Vol.120 (4), p.723-729
Main Authors: Park, Seung Beom, Kim, Kyungseung, Lee, Kyoung Hwan, Kim, Hyung Taek, Nam, Chang Hee
Format: Article
Language:English
Subjects:
Engineering
Harmonic generations
Harmonics
Laser beams
Lasers
Optical Devices
Optics
Photonics
Physical Chemistry
Physics
Physics and Astronomy
Quantum Optics
Spectra
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Summary:The high-harmonic generation in a two-color laser field, consisting of a 30-fs Ti:Sapphire laser pulse and its second harmonic, could be enhanced by installing an extra gas medium of Ar in front of the harmonic generation medium of He. The effects of the extra medium were examined by analyzing harmonic spectra taken under different experimental conditions. The observed characteristics of enhanced harmonic generation were explained in terms of the profile modification of the two-color laser beam. The 34th harmonic at 23.5 nm and 38th harmonic at 21.5 nm were enhanced 2.5 and 2 times, respectively.
ISSN:0946-2171
1432-0649
DOI:10.1007/s00340-015-6188-8