Abstract

We show that extra resonances, such as those caused in frequency-domain nonlinear wave mixing by pure dephasing or laser fluctuations, can also be induced by operation in the time domain. These pulse-length-induced extra resonances arise in transient-grating experiments when the laser pulses are short enough that a steady extra be achieved during the excitation process. We show theoretically that these resonances increase in state cannot with decreasing excitation pulse length until the pulse length becomes shorter than the dephasing time strength of the medium and quote an experimental example to support this interpretation.

© 1993 Optical Society of America

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