Three-focal-spot terahertz diffractive optical element-iterative design and neural network approach
Authors:
- Paweł Komorowski,
- Patrycja Czerwińska,
- Mateusz Józef Surma,
- P Zagrajek,
- Ryszard Piramidowicz,
- Agnieszka Siemion
Abstract
The redistribution of an incoming radiation into several beams is necessary in telecommunication to demultiplex data signals. In the terahertz spectral range, it can be realized by easy-to-manufacture diffractive optical elements (DOEs) allowing to focus the radiation into multiple focal spots in a single plane. In this article, we present diffractive optical elements focusing THz radiation into three focal spots. Different focal spot distributions (symmetric and asymmetric) are designed using an iterative algorithm. The phase distribution forming asymmetric focal spots can be realized by iterative design, which is a novel approach, to our knowledge. Then, the structures are manufactured using a sintering-based 3D-printing method from polyamide 12 (PA 12) and measured in an experimental setup for 150 GHz frequency. A novel approach based on neural networks (NNs) is proposed to optimize the phase delay maps of the structures to further improve their performance – the higher efficiency and the lower unwanted background noise.
- Record ID
- WUT10098882e2314e9d84cbe3ca863bb642
- Author
- Journal series
- Optics Express, ISSN 1094-4087
- Issue year
- 2021
- Vol
- 29
- No
- 7
- Pages
- 11243-11253
- ASJC Classification
- DOI
- DOI:10.1364/OE.418059 Opening in a new tab
- URL
- https://www.osapublishing.org/oe/fulltext.cfm?uri=oe-29-7-11243&id=449559 Opening in a new tab
- Language
- (en) English
- License
- File
-
- File: 1
- Three-focal-spot terahertz diffractive optical element-iterative design and neural network approach, File WUT10098882e2314e9d84cbe3ca863bb642.pdf / 5 MB
- WUT10098882e2314e9d84cbe3ca863bb642.pdf
- publication date: 25-03-2022
- Three-focal-spot terahertz diffractive optical element-iterative design and neural network approach, File WUT10098882e2314e9d84cbe3ca863bb642.pdf / 5 MB
-
- Score (nominal)
- 140
- Score source
- journalList
- Score
- = 140.0, 21-05-2022, ArticleFromJournal
- Publication indicators
- = 3; = 1; = 2; : 2017 = 1.567; : 2020 (2 years) = 3.894 - 2020 (5 years) =3.701
- Citation count
- 3
- Uniform Resource Identifier
- https://repo.pw.edu.pl/info/article/WUT10098882e2314e9d84cbe3ca863bb642/
- URN
urn:pw-repo:WUT10098882e2314e9d84cbe3ca863bb642
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or PerishOpening in a new tab system.