| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Optimization of Single or Range of Harmonics by Using Two Gas Jets |
| LI Xiao-Yong1,2, WANG Guo-Li1**, ZHOU Xiao-Xin1** |
1College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070
2Experimental Center, Northwest University for Nationalities, Lanzhou 730030
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| Cite this article: |
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LI Xiao-Yong, WANG Guo-Li, ZHOU Xiao-Xin 2014 Chin. Phys. Lett. 31 064204 |
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Abstract The interference of high-order harmonics generated by two successive gas jets within a single laser pulse is discussed by a modeling with the inclusion of macroscopic propagation of the fundamental and harmonic fields in an ionizing medium. Based on the interference, we show that one can extract the laser Rayleigh range from the interference of harmonics and the accuracy of retrieve is independent of carrier-envelope phase while dependent on the pulse duration. Moreover, we demonstrate that it is possible to optimize the single or range of harmonics with a high ratio relative to the adjacent orders by changing the separation of two gas jets, which is unavailable by using a single gas jet and linear polarized laser pulse.
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Published: 26 May 2014
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| PACS: |
42.65.Ky
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(Frequency conversion; harmonic generation, including higher-order harmonic generation)
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42.65.Re
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(Ultrafast processes; optical pulse generation and pulse compression)
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42.25.Bs
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(Wave propagation, transmission and absorption)
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31.70.Hq
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(Time-dependent phenomena: excitation and relaxation processes, and reaction rates)
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