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1

Active control of terahertz wave assisted by dielectric loaded plasmonic waveguide

Liu Huaiqing, Yang Mengya, He Xue, Jiang Youchao, Zhou Xiancun, Fu Maosheng

Optica Applicata

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2022

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Vol. 52, nr 1

89--99

EN

We propose and numerically investigate a directional coupler which consists of two dielectric loaded InSb based terahertz (THz) plasmonic waveguides. Owing to the permittivitly tunable property of InSb, the coupling strength between the two dielectric loaded plasmonic waveguides is affected by temperature, so the maximum power coupled from the input waveguide to the cross-waveguide and the correspondingly coupling length could be effectively tailored by altering temperature. Under different temperatures, this directional coupler could act as a thermally controlled terahertz wave switch or a 3-dB terahertz splitter around the frequency of 1.17 THz. This ultracompact and thermally controlled plasmonic directional coupler may find potential important applications in the highly integrated photonic circuits for terahertz system and technologies.

2

Design of a novel passive optical line protection for fiber to the home networks

Hacene I., Karim F.

Opto-Electronics Review

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2021

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Vol. 29, No. 1

33--38

EN

In this paper, a theoretical design of a novel passive optical line protection device for fiber to the home networks is presented and discussed. Such a device has been designed to overcome several issues of the conventional optical line protection which is based on a switching mechanism controlled electronically. The proposed design is suitable for multiplexed passive optical networks, especially, the dense wavelength division multiplexing technology. This unit is installed at both ends of the network and is composed of a 1×2 splitter to deliver the transmitted multiplexed signal to 2 optical paths and a 2×1 (99.9/0.1) coupler allowing an automatic control when a problem appears. Two optical line protection units exchange optical data through 2 dual fibers. In the case where the primary link suffers from a transmission problem, it automatically switches without any electronic control whatsoever to the backup link through a passive (99.9/0.1) coupler with an average total loss estimated to be of 3.2 dB.

3

Four-channel multiplexer on surface plasmon polaritons development and research

Nevinskyі D. V., Zakalyk L. I., Lebid S. Y., Korzh H. I., Pavlysh V. A.

Challenges of Modern Technology

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2016

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Vol. 7, no. 1

7--11

EN

Simulation of the surface plasmon polariton (SPP) distribution in the 10 μm long four-channel multiplexer is conducted in present paper. The excitation of the SPP was done using the 632.8 nm pulse laser with 50 fs pulse duration. The simulation processes of the SPP propagation in the fourchannel multiplexer were performed for the latter switched as a splitter as an adder. Though the obtained signal strength is low due to ohmic losses and signal reflections in the middle of the waveguide it is possible to registrate it. The detailed procedure of waveguides preparation, analysis and registration of SPP propagation is described in the paper. For the proposed model verification the two-channel 20 μm long splitter was formed by optical projection lithography. Studies have shown that the SPP is distributed throughout the whole structure of the 20 μm long two-channel splitter with a partial extinction due to ohmic losses.

4

Analysis of the CaTV splitters

Krzemieniecki D., Juchniewicz J.

Electronics and Telecommunications Quarterly

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2008

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Vol. 54, No 2

203-221

EN

This article presents CaTV splitters. Basic features of splitters and influence of basic factors on crucial parameters were investigated in this article. Additionally, correction circuits for parameters improvement were proposed. The research considered two-way, three-way and four-way splitters. Some examples of applications of splitters in passive devices used in CaTV network were presented.

5

Analysis of the CaTV Splitterring Taps

Krzemieniecki D., Juchniewicz J.

Electronics and Telecommunications Quarterly

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2008

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Vol. 54, No 3

429-443

EN

This article presents CaTV splitterring taps. Basic features of the splitterins taps and the influence of basic factor on crucial parameters were investigated in this article. Additionally, correction circuits for improvement of certain parameters were proposed. The research considered the two-way, three-way and eight-way splitterring taps. Some examples of applications of splitterring taps in passive devices used in CaTV network were presented in this paper.