“…Most of the values chosen are based on previous publications concerning LiNbO 3 . 25,26 However, the activation energy of the electrons, ⑀ e ϭ0.11 eV, is a little lower than the reported data ͑0.18 eV͒ 27 but is still reasonable because our sample of LiNbO 3 crystal is heavily doped with Fe, which could result in a decreased activation energy of electrons, as pointed out by Barkan, Entin, and Marennikov. 28 The initial scattering noise to input beam ratio (m o ) is assumed to be 5ϫ10 Ϫ3 , which corresponds to a scattering light intensity of about 20 W. We also assume the average angle between the scattered light and the input beam is about ϭ4 deg.…”