✦ LIBER ✦

Phase-dependent absorption and stimulated emission in femtosecond pump-probe experiments

✍ Scribed by B. Fain; S.H. Lin

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 619 KB
Volume: 207
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(93)89002-y

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✦ Synopsis

The pump pulse induces nonstationarity and coherence in the medium. It is shown that there are mechanisms of absorption (emission) which depend on the phase difference between the field and the matter oscillator. They are principally different from conventional absorption and stimulated emission. The absorption (emission) of the probe pulse in tbe nonstationary coherent medium belongs to the phase-dependent Raman absorption (stimulated emission). The sip of this absorption depends on frequency and time delay between the probe and pump pulse. The time delay dependence corresponds to the phase dependence. The possibility of amplification without the inversion of population is the characteristic feature of the phase-dependent mechanisms of absorption (emission) considered here.

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