在加压光折变掺铈铌酸锶钡(SBN)晶体中观察了由无衍射分立光束所产生的光子晶格。重点实验观察了三束光干涉和六束光干涉两种情况下所产生的光子晶格， 利用远场衍射图、布里渊区光谱图和傅里叶空间频谱图比较了这两种光子晶格的相同点和区别，并且进行了理论分析。结果表明由三束光干涉产生的光子晶格 更均匀稳定。另外，又分别模拟了四光束干涉、五光束干涉、七光束干涉、八光束干涉、九光束干涉和十光束干涉这几种情况下所获得的光子晶格的传输图。

The photonic lattice induced by nondiffracting discrete beam was observed in an externally biased cerium doped strontium barium niobate(SBN) photorefractive crystal. And the photonic lattice induced by the interference of three beams and six beams was observed especially. Some differences and similarities of the photonic lattice in these two cases were analyzed by far-field diffraction pattern, Brillouin-zone spectroscopy and Fourier spatial spectrum. And some theoretical analysis were carried out. The results show that the photonic lattice induced by the interference of three beams is more uniform and stable. In addition, the transmission diagrams of the photonic lattice induced by the interference of four beams, five beams, seven beams, eight beams, nine beams and ten beams were simulated respectively.