High-order harmonic generation using intense femtosecond pulses
J. J. MacklinEdward L. Ginzton Laboratory, Stanford University, Stanford, California 94305J. D. KmetecEdward L. Ginzton Laboratory, Stanford University, Stanford, California 94305C. L. GordonEdward L. Ginzton Laboratory, Stanford University, Stanford, California 94305
1993en
ABI
Annotatsiya
Neon gas excited by 800-nm laser pulses (15 mJ, 125 fsec) at an intensity near ${10}^{15}$ W/${\mathrm{cm}}^{2}$ generates harmonics up to 109th order. The appearance of successively higher harmonics as the laser intensity is increased is compared to recent calculations of the strong-field atomic response. Blueshifting of the laser and harmonic wavelengths indicates a small degree of ionization until the threshold for the highest harmonic (>91st) is reached.
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