The Evolution of Vortex Laser in Organic Crystal DSTMS

A study of the evolutionary mechanism of vortex beams in nonlinear organic crystal DSTMS has been initially investigated, which shows that the nonlinear transmission effect can change the light intensity distribution of vortex beam to a large extent. The generalized Gaussian beam decomposition method is utilized to simulate and analyze the light intensity distribution of the LG beam before and after passing through the medium with Kerr-like effect, showing that the Kerr medium affects the incident LG beam by producing LG beams with different radial modes. Moreover, the effect of different polarization of the incident vortex light on vortex mid-infrared laser transmission in DSTMS, demonstrating the effect of nonlinear transmission on the LG beam is investigated.

本研究针对涡旋光束（vortex beams）在非线性有机晶体DSTMS中的演化机制开展了初步探索，研究表明非线性传输效应可在较大程度上改变涡旋光束的光强分布。本研究采用广义高斯光束分解法（generalized Gaussian beam decomposition method），对经过类克尔（Kerr-like）介质传输前后的拉盖尔-高斯（Laguerre-Gaussian, LG）光束的光强分布进行模拟与分析，结果显示类克尔介质通过产生不同径向模式的LG光束，对入射LG光束实现调控。此外，本研究还探究了入射涡旋光的不同偏振态对涡旋中红外激光在DSTMS中的传输特性的影响，进一步验证了非线性传输对LG光束的调控效应。