Frequency Division Multiplexing of Terahertz Waves Realized by Diffractive Optical Elements

被引:15
|
作者
Komorowski, Pawel [1 ]
Czerwinska, Patrycja [2 ]
Kaluza, Mateusz [2 ]
Surma, Mateusz [2 ]
Zagrajek, Przemyslaw [3 ]
Sobczyk, Artur [2 ]
Ciurapinski, Wieslaw [3 ]
Piramidowicz, Ryszard [1 ]
Siemion, Agnieszka [2 ]
机构
[1] Warsaw Univ Technol, Inst Microelect & Optoelect, Koszykowa 75, PL-00662 Warsaw, Poland
[2] Warsaw Univ Technol, Fac Phys, Koszykowa 75, PL-00662 Warsaw, Poland
[3] Mil Univ Technol, Inst Optoelect, Kaliskiego 2, PL-00908 Warsaw, Poland
来源
APPLIED SCIENCES-BASEL | 2021年 / 11卷 / 14期
关键词
diffractive optical elements; THz; 3D printing; multiplexing; frequency division multiplexing; telecommunication; THZ; TRANSMISSION;
D O I
10.3390/app11146246
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Recently, one of the most commonly discussed applications of terahertz radiation is wireless telecommunication. It is believed that the future 6G systems will utilize this frequency range. Although the exact technology of future telecommunication systems is not yet known, it is certain that methods for increasing their bandwidth should be investigated in advance. In this paper, we present the diffractive optical elements for the frequency division multiplexing of terahertz waves. The structures have been designed as a combination of a binary phase grating and a converging diffractive lens. The grating allows for differentiating the frequencies, while the lens assures separation and focusing at the finite distance. Designed structures have been manufactured from polyamide PA12 using the SLS 3D printer and verified experimentally. Simulations and experimental results are shown for different focal lengths. Moreover, parallel data transmission is shown for two channels of different carrier frequencies propagating in the same optical path. The designed structure allowed for detecting both signals independently without observable crosstalk. The proposed diffractive elements can work in a wide range of terahertz and sub-terahertz frequencies, depending on the design assumptions. Therefore, they can be considered as an appealing solution, regardless of the band finally used by the future telecommunication systems.
引用
收藏
页数:14
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