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Opt Lett. 2009 Jul 15;34(14):2102-4. doi: 10.1364/OL.34.002102.

Broadband water window supercontinuum generation with a tailored mid-IR pulse in neutral media.

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  • 1Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, China.


We propose a new (to our knowledge) scheme to generate a broadband water window supercontinuum in a neutral rare-gas media. Using a phase-stabilized few-cycle mid-IR pulse tailored by a much weaker 800 nm pulse, a supercontinuum from 265 to 425 eV is observed, and the ionization probability is below 0.1%. The nonionized media enable us to adopt the right phase-matching technique to select the short path of the supercontinuum, and an isolated 80 as pulse with a central wavelength of 3.2 nm is straightforwardly obtained.

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