Design of diffractive optical elements to suppress the Bessel-Gauss beam generated by reflective off-axis axicon
Year: 2025
Type: article
Abstract: A phase updating algorithm is proposed to design a diffractive optical element (DOE) to suppress the side-lobes of the Bessel-Gauss beam generated by the reflective off-axis axicon. Due to the tilt between the incident light and the outgoing light, conventional angular spectrum method (ASM)-based algorithm cannot be directly applied to the calculation of the off-axis Bessel-Gauss beam. To update the phase of the DOE, a novel algorithm is used where non-uniform inverse discrete Fourier transform is employed to calculate the off-axis diffraction. Only one iteration is required to obtain the specified Bessel-Gauss beam. For a Bessel-Gauss beam with a central peak diameter of 21.5 (9.8) μm, we demonstrate a DOE with the side-lobes energy lower than 0.8% and depth of focus (DOF) of 399.1 (100.7) μm, respectively.
Source: Results in Physics
Authors: Qifeng Yan, Shuai Zhao, XiangJi Guo, Tao Chen, Ming Ming
Institution: University of Chinese Academy of Sciences
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,920
OpenAlex ID: W4417147640