The optical Stark effect in an active laser medium

Monique Combescot

Vladimir D Taranukhin, M. Yu. Pogosbekyan

The amplification of intense light pulses in resonance active media with an optical Stark effect and coherence effects is examined theoretically. In the course of the amplification, the pulse may go through a stage of an incoherent Stark quasisoliton. The envelope of this quasisoliton has an approximately constant, highly asymmetric shape. The energy of the quasisoliton is approximately constant. Upon further amplification, the Stark quasisoliton "breaks up" into a train of shorter pulses. Over a sufficiently long amplification distance, a true soliton may form in the active medium. In general, this true soliton is not the same as a standard π pulse in a medium without a Stark effect.

Felix Schuda, Carlos R. Stroud, Michael Hercher

Theodor W. Hänsch, R. Keil, Alfred Schabert +2 more

R F Mardanov, Yu. E. Pol’skii

The semiclassical approximation is used in an analysis of the nonlinear shift of the frequency of an electric dipole transition in a high-power radiation field. It is shown that the shift can only increase the frequency. The magnitude of the shift is proportional to the field intensity but independent of its frequency. Secondapproximation relationships are derived for the calculation of the parameters of the interaction of the field with an active medium. Numerical estimates of the Stark effect are obtained for some gaseous active media.

George C. Baldwin