Abstract
We extend a recent suggestion for the generation of subfemtosecond pulses by molecular modulation [Phys. Rev. Lett. 81, 2894 (1998)] to the rotational spectrum of molecular hydrogen . When a rotational transition is strongly driven the generation and phase-slip lengths are of the same order and the Raman spectrum has approximately Bessel function sideband amplitudes. Numerical simulation predicts that this spectrum (generated in a 14-cm-long cell at 1-atm pressure of ) will compress into a train of pulses with 94-fs pulse separation and a pulse length of 0.5 fs.
© 1999 Optical Society of America
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