Opt Lett. 2018 Jul 1;43(13):3168-3171. doi: 10.1364/OL.43.003168.
In this Letter, we studied the near-field effect of the nonlinear Raman-Nath diffraction experimentally in a 1D periodically poled LiTaO crystal and established a theoretical relationship between the nonlinear effect in the near field and the corresponding effect in the far field. The interference of far-field spots in the near field constitutes the nonlinear Talbot self-imaging effect. Our results not only enhance our understanding of the nonlinear Talbot effect, but they also indicate potential applications of this effect in domain inspection and domain design.
在这封信件中，我们在一维周期极化 LiTaO 晶体中实验研究了非线性 Raman-Nath 衍射的近场效应，并建立了近场中非线性效应与远场中相应效应之间的理论关系。远场光斑在近场中的干涉构成了非线性泰伯自成像效应。我们的研究结果不仅增强了我们对非线性泰伯效应的理解，而且还表明了该效应在畴检验和畴设计中的潜在应用。
