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Supercontinuum Generation in Atmospheric-Pressure Nitrogen Using a Tightly Focused Intense Femtosecond Laser Beam |
| QIN Yuan-Dong;ZHU Chang-Jun;YANG Hong;GONG Qi-Huang |
| Department of Physics, Mesoscopic Physics Laboratory, Peking University, Beijing 100871 |
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| Cite this article: |
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QIN Yuan-Dong, ZHU Chang-Jun, YANG Hong et al 2000 Chin. Phys. Lett. 17 413-415 |
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Abstract Supercontinuum generation in atmospheric-pressure nitrogen by a focused intense femtosecond Ti: sapphire laser was studied at various pulse durations and energies. The generated supercontinuum was greatly blue-broadened due to self-phase modulation in the plasma produced. The measured blue-broadening Δω is proportional to pulse intensity for fixed pulse duration, and values up to 0.7ω (ω being the original laser frequency) was obtained with a pulse energy of 9.5 mJ and minimum duration of 100 fs.
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| Keywords:
33.80.-b
42.65.Ky
52.40.Nk
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Published: 01 June 2000
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| PACS: |
33.80.-b
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(Photon interactions with molecules)
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42.65.Ky
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(Frequency conversion; harmonic generation, including higher-order harmonic generation)
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52.40.Nk
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