Laser-heating-based active optics for synchrotron radiation applications
Abstract
Active optics has attracted considerable interest from researchers in synchrotron radiation facilities, because of its capacity for x-ray wavefront correction. Here, we report a novel and efficient technique for correcting or modulating a mirror surface profile based on laser-heating-induced thermal expansion. An experimental study of the characteristics of the surface thermal deformation response indicates that the power of a milliwatt laser yields a bump height as low as sub-nanometer scale, and that variation of the spot size modulates the response function width effectively. In addition, the capacity of the laser-heating technique for free-form surface modulation is demonstrated via a surface correction experiment. The developed method is a promising new approach towards effective x-ray active optics coupled with at-wavelength metrology techniques.
Cite
@article{arxiv.1604.06493,
title = {Laser-heating-based active optics for synchrotron radiation applications},
author = {Fugui Yang and Ming Li and Xiaowei Zhang},
journal= {arXiv preprint arXiv:1604.06493},
year = {2016}
}