Non-uniform sampling and wide range angular spectrum method

YH Kim, CW Byun, H Oh, JW Lee, JE Pi, GH Kim… - Journal of …, 2014 - iopscience.iop.org
YH Kim, CW Byun, H Oh, JW Lee, JE Pi, GH Kim, ML Lee, H Ryu, HY Chu, CS Hwang
Journal of Optics, 2014iopscience.iop.org
A novel method is proposed for simulating free space field propagation from a source plane
to a destination plane that is applicable for both small and large propagation distances. The
angular spectrum method (ASM) was widely used for simulating near field propagation, but it
caused a numerical error when the propagation distance was large because of aliasing due
to under sampling. Band limited ASM satisfied the Nyquist condition on sampling by limiting
a bandwidth of a propagation field to avoid an aliasing error so that it could extend the …
Abstract
A novel method is proposed for simulating free space field propagation from a source plane to a destination plane that is applicable for both small and large propagation distances. The angular spectrum method (ASM) was widely used for simulating near field propagation, but it caused a numerical error when the propagation distance was large because of aliasing due to under sampling. Band limited ASM satisfied the Nyquist condition on sampling by limiting a bandwidth of a propagation field to avoid an aliasing error so that it could extend the applicable propagation distance of the ASM. However, the band limited ASM also made an error due to the decrease of an effective sampling number in a Fourier space when the propagation distance was large. In the proposed wide range ASM, we use a non-uniform sampling in a Fourier space to keep a constant effective sampling number even though the propagation distance is large. As a result, the wide range ASM can produce simulation results with high accuracy for both far and near field propagation. For non-paraxial wave propagation, we applied the wide range ASM to a shifted destination plane as well.
iopscience.iop.org
以上显示的是最相近的搜索结果。 查看全部搜索结果

Google学术搜索按钮

example.edu/paper.pdf
查找
获取 PDF 文件
引用
References