Investigation on the Formation of Laser Transverse Pattern Possessing Optical Lattices

Frontiers in Physics

Xin Wang²  Changming Zhao²  Yuan Gao²  Zilong Zhang²  Suyi Zhao²  Yuchen Jie² 

[1] Key Laboratory of Photoelectronic Imaging Technology and System, Ministry of Education of People’s Republic of China, Beijing, China;Key Laboratory of Photonics Information Technology, Ministry of Industry and Information Technology, Beijing, China;School of Optics and Photonics, Beijing Institute of Technology, Beijing, China;

关键词: laser transverse patterns;    optical lattice;    optical vortex lattice;    transverse mode locking;    structured light;   

DOI  :  10.3389/fphy.2021.801916

来源: DOAJ

【 摘 要 】

Optical lattices (OLs) with diverse transverse patterns and optical vortex lattices (OVLs) with special phase singularities have played important roles in the fields of atomic cooling, particle manipulation, quantum entanglement, and optical communication. As a matter of consensus until now, the OL patterns are generated by coherently superimposing multiple transverse modes with a fixed phase difference through the transverse mode locking (TML) effect. There are phase singularities in the dark area of this kind of OL pattern, so it is also called OVL pattern. However, in our research, it is found that some high-order complex symmetric OL patterns can hardly be analyzed by TML model. Instead, the analysis method of incoherent superposition of mode intensity could be applied. The OL pattern obtained by this method can be regarded as in non-TML state. Therefore, in this article, we mainly study the distinct characteristics and properties of OL patterns in TML and non-TML states. Through intensity comparison, interferometry, and beat frequency spectrum, we can effectively distinguish OL pattern in TML and non-TML states, which is of significance to explore the formation of laser transverse pattern possessing OL.

【 授权许可】

Unknown