Affiliation:
1. Wuhan University
2. Wuhan Polytechnic University
Abstract
We experimentally extend the nonlinear Gaussian to flat-top beam shaping from one to two dimensions through a three-dimensional nonlinear photonic crystal. Employing a near-infrared femtosecond laser, we induce a modification inside lithium niobate to achieve a second-order nonlinear optical coefficient modulation in three dimensions. The flat-topped truncation of wavefront has been adjusted in a mutual perpendicular coordinate separately. Among the generated flat-topped beams, the optimal flatness is 97.1%, and the nonlinear conversion efficiency is 10−2 at the peak power of 37 kW with the interaction length of 630 µm. By adding an extra dimension, our work simultaneously enables full-wavefront flat-top distribution and nonlinear frequency conversion.
Funder
Strategic Priority Research Program of Chinese Academy of Sciences
Taishan Scholar Program, Outstanding Youth Foundation of Shandong Province, China
Qingdao New Energy Shandong Laboratory Open Project
Cited by
1 articles.
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