Abstract
The saturable absorber dye jet of a femtosecond ring dye laser provides an ideal candidate for the study of fast transients in de- generate four-wave mixing (DFWM). Since the counterpropagating pulses in the ring laser meet at the absorber jet, the problem of timing the DFWM pump pulses is solved. The energy of the pulses inside the cavity is such that the absorber is saturated. This meets one of the conditions for efficient DFWM in saturable media.1 Since the dye jet is thin, fast transients in DFWM are not masked by propagation effects.
© 1984 Optical Society of America
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