We investigated the 120 keV hydrogen ion implanted LiTaO3 samples in the dose range of(5~8)×1016 cm-2.To observe the implantation induced crystal structure and composition changes we use the Raman sca
To obtain laser output with high beam quality and a square super-Gaussian flat-topped distribution,a high-energy laser needs to conduct spatial reshaping of the geometric outline of an injected Gaussi
The resolution of imaging is limited by the missing of high-frequencies information.However,these information can be amplified by the metamaterial or surface plasmon polaritons.A silver film having su
The wave front recording and reconstruction of an object are numerically performed using a computer in this study.The two-,three-and four-step phase shifting algorithms are proposed in order to suppre
Definitions of mode-field half-width and divergence half-angle according to different kinds of methodswereanalyzed in this paper.Then,numerical results of these definitions weregiven for the fundament