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Photonics
Special Issues
Recent Advances in THz and Microwave Photonics
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Recent Advances in THz and Microwave Photonics

A special issue of Photonics (ISSN 2304-6732). This special issue belongs to the section "Optical Communication and Network".

Deadline for manuscript submissions: closed (31 March 2023) | Viewed by 4994

Special Issue Editors

Dr. Xiaopeng Xie

E-Mail Website
Guest Editor
School of Electronics, Peking University, Beijing 100871, China
Interests: microwave photonics and low-noise optoelectronic devices
Prof. Dr. Xianbin Yu

E-Mail Website
Guest Editor
Zhejiang Lab, Hangzhou 311121, China
Interests: THz communication; microwave photonics; THz photonics; ultrafast photonic signal processing; photonic wireless communication

Special Issue Information

Dear Colleagues,

During the past 20 years, microwave photonics has tightly and successfully combined photonics and electronics. We have witnessed and contributed many breakthroughs in our community. Some advancements have already entered our daily lives, such as radio-over-fiber technology. Some research is still in the lab, and may be on the way to bringing more convenience to people's lives. We use photonics technologies to generate, transfer, and process microwave or THz signals. We apply cutting-edge integration approaches to make microwave photonic devices and systems more compact and more stable, with lower power consumption. The emergence of new photonics devices like chip-scale optical frequency combs has shone new light on microwave photonics. Thanks to the progress in classical components like high-power photodiode and laser systems, microwave photonics is entering a new age.

This Special Issue aims to present original cutting-edge research articles concerning THz and microwave photonics. It covers a wide range of topics related to THz and microwave photonics, including but not limited to:

  • Low-noise photonics microwave generation;
  • Optical frequency comb and its application in MWP;
  • Advanced signal-processing techniques;
  • Integrated MWP devices;
  • THz device technology and system application;
  • Time and frequency transfer;
  • MWP sensing technology;
  • MWP radar;
  • RoF for 5G and beyond;
  • Precision measurement with WMP;
  • High-power photodiode.

Dr. Xiaopeng Xie
Prof. Dr. Xianbin Yu
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Photonics is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • low noise photonics microwave generation
  • optical frequency comb and its application in MWP
  • advanced signal processing techniques
  • integrated MWP devices
  • THz device technology and system application
  • time and frequency transfer
  • MWP sensing technology
  • MWP radar
  • RoF for 5G and beyond
  • precision measurement with WMP
  • high-power photodiode

Published Papers (3 papers)

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Research

7 pages, 1302 KiB  
Communication
A Terahertz Circulator Based on Magneto Photonic Crystal Slab
by Biaogang Xu, Dengguo Zhang, Yong Wang, Binbin Hong, Guoxiang Shu and Wenlong He
Photonics 2023, 10(4), 360; https://doi.org/10.3390/photonics10040360 - 23 Mar 2023
Cited by 2 | Viewed by 1198
Abstract
In this paper, a terahertz circulator based on a magneto photonic crystal slab is envisaged. The triangular lattice photonic crystals with a line defect waveguide were constructed on an Al2O3 ceramic slab. Two cylindrical ferrites and two copper-clad plates in [...] Read more.
In this paper, a terahertz circulator based on a magneto photonic crystal slab is envisaged. The triangular lattice photonic crystals with a line defect waveguide were constructed on an Al2O3 ceramic slab. Two cylindrical ferrites and two copper-clad plates in the junction of the Y-shaped wave-guide worked as a magneto-optical cavity resonator to approve the nonreciprocal function. In the working frequency range, 0.212–0.238 THz, the isolation of the circulator was better than 20 dB, and the insertion loss was better than 1 dB. The designed circulator based on the magneto photonic crystal slab experienced low loss and a wide bandwidth that satisfied its use in the THz application. Full article
(This article belongs to the Special Issue Recent Advances in THz and Microwave Photonics)
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12 pages, 2839 KiB  
Article
High-Performance Dual-Channel Photonic Crystal Terahertz Wave Modulator Based on the Defect Mode Disappearance of a Combined Microcavity
by Gaofang Li, Jie Tan, Yanxia Xu, Haoyang Cui, Bo Tang, Zhejing Jiao, Wei Zhou, Jundong Zeng and Nenghong Xia
Photonics 2023, 10(3), 298; https://doi.org/10.3390/photonics10030298 - 11 Mar 2023
Cited by 2 | Viewed by 1374
Abstract
With the working frequency of wireless communication systems moving to a higher terahertz (THz) band, the design of high-performance THz wave modulators has become a pivotal issue to be tackled urgently in THz communication. In this paper, we design a high-performance dual-channel photonic [...] Read more.
With the working frequency of wireless communication systems moving to a higher terahertz (THz) band, the design of high-performance THz wave modulators has become a pivotal issue to be tackled urgently in THz communication. In this paper, we design a high-performance dual-channel photonic crystal modulator to enable ON–OFF regulation of the THz wave based on the defect mode disappearance of combined microcavities. The modulator introduces Y-type line defects into silicon rod photonic crystals as a dual-channel waveguide and the point defects and ring resonator form a combined microcavity. Due to the refractive index of the ring resonator filler, gallium arsenide, it is tunable with pump light excitation, and the defect mode frequency of the combined microcavity can be dynamically changed. Under pump excitation with a wavelength of 810 nm and an intensity of 0.4 μJ/cm2, 1.34 THz and 1.83 THz dual-channel waves can be OFF due to the defect mode disappearance of the combined microcavity. This is simulated by the time-domain steady-state response and steady-state THz wave field intensity distribution of the modulator by the finite-difference time-domain method. The results indicate that the dual-channel modulator has large modulation depths of 100% and 99.7%, high modulation rates of 4.05 GHz and 4.17 GHz, and low insertion losses of 0.31 dB and 0.18 dB, which lays foundation for the development of high-speed and low-loss THz communication technology. Full article
(This article belongs to the Special Issue Recent Advances in THz and Microwave Photonics)
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11 pages, 3288 KiB  
Article
Photonic Integrated Frequency Shifter Based on Double Side Band Modulation: Performance Analysis
by Andrés Betancur-Pérez, Cristina de Dios and Pablo Acedo
Photonics 2022, 9(11), 793; https://doi.org/10.3390/photonics9110793 - 25 Oct 2022
Viewed by 1932
Abstract
In this research, we present an analysis of a photonic integrated frequency shifter as a stage for a THz dual comb generator. We studied the performance of the PIC by simulating it with standard building blocks, and aimed toward an improvement of the [...] Read more.
In this research, we present an analysis of a photonic integrated frequency shifter as a stage for a THz dual comb generator. We studied the performance of the PIC by simulating it with standard building blocks, and aimed toward an improvement of the output signal quality. We revised two approaches of the PIC by simulating two modes of generating a double side band modulation suppressed carrier (DSB-SC) with a Mach Zehnder modulator structure (MZM). One approach was using a single Electro-Optic Phase Modulator (EOPM) on an MZM structure (SE-MZM), and the other one was using Double EOPM (DE-MZM). We found a cleaner spectrum with the DE-MZM, since this structure is usually applied to reduce the chirp effect in optical communication systems. We obtained 23 dB of side mode suppression ratio SMSR with one filter, and 44 dB of SMSR with a two-stage filter. In the case of DE-MZM, we obtained a clean tone on intermediate frequency (IF) free of spurious sidebands and comb in IF frequency with 10 dB more power compared to SE-MZM. Full article
(This article belongs to the Special Issue Recent Advances in THz and Microwave Photonics)
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