Stable generation of high-order harmonics of femtosecond laser radiation from laser produced plasma plumes at 1 kHz pulse repetition rate |
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Authors: | Hutchison Christopher Ganeev Rashid A Witting Tobias Frank Felix Okell William A Tisch John W G Marangos Jon P |
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Affiliation: | Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2AZ, United Kingdom. |
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Abstract: | We present a method for the creation of stable weakly ionized plasmas from laser ablation of solid targets using a 1 kHz pulse repetition rate laser, which can be used for stable high-order harmonic generation from plasma plumes. The plasma plumes were generated from cylindrical rotating targets. Without target rotation the intensity of harmonics in the 40-80 nm range drops by more than one order of magnitude during less than 10(3) shots, while, with rotation of the target at typically 30 revolutions per minute, stable emission of high-order harmonics from aluminum plasma plumes with variation of less than 10% was maintained for >10(6) laser shots. |
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