Abstract
The recent experiments by Sokolov and colleagues have shown that coherent molecular oscillations may generate a comb of coherent collinear sidebands with 50,000 cm−1 of spectral bandwidth. The essence of the technique is the use of a Raman transition with a sufficiently large coherence that the generation length and the phase-slip length are of the same order. The coherence is established by driving the molecular transition with two single-mode laser fields, slightly detuned from the Raman resonance, so as to excite a single molecular eigenstate.1 As in traditional mode locking, the synthesis of well- formed subfemtosecond and single-cycle optical pulses requires phase correction of as many modes as can be practically obtained. Present liquid crystal and acoustic techniques allow in excess of 1000 resolvable pixels and it is desirable to have a technique for generating a total number of sidebands which are of order.
© 2002 Optical Society of America
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