… the forward and the backward pump beams are much stronger than those of the probe and
the phase-conjugate beams, we can assume the depletion of two pump beams is negligible. …

… As we show in the next section, however, the inclusion of pump depletion introduces important
… is inappropriate and here, too, we use the depleted pumps analysis of Section 111. After …

… from a high intensity pump beam with disturbed wavefront [19]. Photorefractive crystals are
an … For low light intensities N- 2 is small because of thermal depletion of the shallow center. …

… beams (signal-to-pump ratio). The experiment, done with a BaTiO 3 crystal, shows good
agreement with the theory of two-beam coupling in the depleted-pump regime. The deviation of …

… (ii) We neglect the pump beam depletion due to the beam coupling, it corresponds to a
regime of small photorefractive gain and high pump to probe beam ratio. (iii) The pump beam …

… a photorefractive crystal with a nonzero photovoltaic effect, an external resistor R and an
external voltage t CRYSTAL I … This section neglects the effect of pump depletion, which is …

… conjugate waves can exceed those of the pumps. Our numerical results, which include the
effects of pump depletion in both the strong- and the weak-pump cases, indicate that at most …

… Energies of pump and probe light are 2.4 and 2.0 eV … shallow level into the conduction
band, but the shallow level is thermally depleted. Thus in a first step the material is sensitized by …

… If we can neglect the depletion of the pumping beam, then yo= eTL. The periodic spacecharge
electric field is shifted in phase from that of the irradiance value between 0 and %/2 and in …

… In the limit of large pump intensities and small gain for the signal fields, at first sight it would
seem reasonable to assume that there is no significant pump depletion, ie taking A 2 and A 3 …