Open AccessMULTILEVEL THEORY OF TIME-DELAY FOUR-WAVE MIXING WITH INCOHERENT LIGHT——INHOMO-GENEOUS BROADENING CASE
Author(s) -
Ruihua Zhang,
Xiangcheng Mi,
Haitian Zhou,
Jiang Qian,
Peixian Ye
Publication year - 1991
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.40.414
Subject(s) - homogeneous broadening , physics , mixing (physics) , four wave mixing , doppler broadening , optics , absorption (acoustics) , spectral line , computational physics , nonlinear optics , quantum mechanics , laser
In this paper, our multi-level theory of time-delay four wave mixing with incoherent light (TDFWM-IL) developed previously for the case of homogeneous broadening system has been extended to a generally inhomogeneous broadening case. From the present theory, a general expression of signal intensity for absorption band with both homogeneous and inhomogeneous broadening is given as a function of mutual time delay τ between two pump beams. Photon echo with incoherent light under the condition of extremely inhomogeneous broadening is discussed, and the difference of results obtained scperately from multi-level and two-level theory is pointed out. It has been demonstrated that the experiment of TDFWM-IL can also be analysed approximately by using an effective two-level model when a weak effect of inhomogeneous broadening of absorption band exists. Finally, our experimental results of TDFWM-IL obtained at zero-phonon line of ruby and absorption edge of cresyl violet film in PMMA are also presented and compared with the theory mentioned above.