포토리프랙티브 결정 내의 두빔 에너지 결합에서의 Bragg 회절 = Bragg Diffraction of Two-Bean Energy Coupling in a Photorefractive Crystal

다국어 초록 (Multilingual Abstract)

In this paper we employ a new method to derive Bragg diffraction from a photorefractive grating without four - wave mixing geometry. In this calculation we assume two - beam energy coupling in a photorefractive crystal to occur due to Bragg diffraction of two incident beams from a photorefractive grating. At a steady - state of two - beam energy coupling we have obtained Bragg diffraction of the incident beams, which corresponds to Bragg diffraction of any incident beam, or a third probe beam. It is shown that our result predicts exactly the same Bragg diffraction as the coupled wave equations of four- wave mixing, and that the diffraction effciency strongly depends on two - beam coupling gain. It is also shown that our result is given by a form much simpler than its counterpart.