Features of collimation and focusing of few-cycle optical beams

2nd International School and Conference Saint-Petersburg OPEN on Optoelectronics, Photonics, Engineering and Nanostructures

Puzyrev, Danila^1 ; Kozlov, Sergey^1

Department of Photonics and Optical Information Technology, ITMO University, Saint-Petersburg

197101, Russia^1

关键词: Collimated beams;    Dielectric medium;    Field structures;    Focusing mirrors;    Optical beams;    Radiation source;    Spatio-temporal structures;    Temporal profile;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/643/1/012059/pdf
DOI  :  10.1088/1742-6596/643/1/012059

来源: IOP

【 摘 要 】

The paper reports theoretical features of collimation and focusing of few-cycle optical beams in transparent isotropic dielectric medium. It was showed, that a spatial collimation of such short waves results in a peculiar shaping of spatio-temporal structure with the central part moving faster than its outlying areas and collimated beam loses with distance half cycle of temporal electromagnetic field oscillation. In focus of focusing mirror, number of oscillations in temporal field structure of beams depends on only temporal profile of radiation source, when focusing collimated wave packet.