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Photonics
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Microwave Photonics Applications
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Microwave Photonics Applications

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

Deadline for manuscript submissions: closed (28 February 2022) | Viewed by 15180

Special Issue Editors

Prof. Dr. Kyriakos E. Zoiros

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Guest Editor
Lightwave Communications Research Group, Department of Electrical and Computer Engineering, School of Engineering, Democritus University of Thrace, 67100 Xanthi, Greece
Interests: SOA devices; circuits and subsystems; applications of microring resonators in optical communications; microwave photonics; free-space optical communications
Special Issues, Collections and Topics in MDPI journals
Assoc. Prof. Dr. Erwin H. W. Chan

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Guest Editor
College of Engineering, IT & Environment, Charles Darwin University, 0909 Darwin, Australia
Interests: microwave photonics; optical telecommunications; optical signal processing; photonic and microwave technology
Dr. Lam Anh Bui

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Guest Editor
School of Engineering and Technology, Central Queensland University, Melbourne, Australia
Interests: microwave photonics; optical signal processing; applications of machine learning in photonics
Prof. Dr. Guangqiong Xia

E-Mail Website
Guest Editor
School of Physical Science and Technology, Southwest University, Chongqing 400715, China
Interests: nonlinear dynamics of semiconductor lasers and their applications; optical chaos secure communication; optical radar; microwave photonics; photonic reservoir computing.
Dr. Jia Ye

E-Mail Website
Guest Editor
Department of Communication Engineering, School of Information Science & Technology, Southwest Jiaotong University, Chengdu 610031, China
Interests: microwave photonics; radio over fiber transmission; arbitrary waveform generation; microwave signal recognition
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Microwave photonics grew out from the invention of photonic link as a mean for low loss, wideband transmission of RF signals using optical carriers. Over the past several decades, microwave photonics has become a significant research area of interest that intersects microwave and photonic fields and addressed a wide range of applications. Although many innovative ideas and laboratory demonstrations have been reported, adoption of microwave photonics in practical applications has been slow and inadequately proportional to its potential. This is mainly due to the limitations associated with size, stability, and cost. With the recent advancements of photonic technology, the maturity and performance level of microwave photonics devices and systems has remarkably been increased leading to a renewal of interest and emerging of new applications. It is therefore timely to review the current state of the art development to attract contributions from the world leaders with a particular emphasis on major breakthroughs and outstanding challenges of microwave photonics applications.

This Special Issue of Photonics, entitled Microwave Photonics Applications, will focus on the latest innovative ideas, the theoretical and practical demonstrations that push the frontier of microwave photonics signal processing and its applications. The special issue will accept contributions that present visionary proposals, state of the art designs and developments, technological breakthroughs, proof of concept demonstrations, experimental verifications, and practical applications.

Contributing papers need to present original, unpublished work and will be subjected to a peer-reviewed process to assure meeting the quality standard of the journal. Submitted manuscripts must be prepared according to the author guidelines of Photonics journal and uploaded through to the MDPI electronic submission system.

Assoc. Prof. Dr. Kyriakos Zoiros
Assoc. Prof. Dr. Erwin H. W. Chan
Dr. Lam Anh Bui
Prof. Dr. Guangqiong Xia
Dr. Jia Ye
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

  • microwave photonics
  • RF photonics
  • photonic links
  • radio over fibre
  • optical signal processing of RF signals
  • microwave photonics filter
  • microwave photonics signal generation
  • photonic sensor interrogation
  • microwave photonics mixing
  • microwave photonics signal transformation
  • integrated microwave photonics
  • microwave photonics device
  • microwave photonics system
  • RF photonics astronomy
  • microwave photonics beam forming
  • microwave photonics electronic warfare
  • microwave photonics for optical communications
  • microwave photonics for machine learning
  • optoelectronics
  • nonlinear microwave photonics
  • reconfigurable microwave photonics processor
  • noise in microwave photonics

Published Papers (6 papers)

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Research

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9 pages, 2472 KiB  
Article
High Linearity Microwave Photonic Up-Conversion System Based on Parallel Dual-Drive Mach–Zehnder Modulators
by Weiheng Wang, Yu Bai, Shuanglin Fu, Xinxin Su, Yiying Gu, Hao Chi, Mingshan Zhao and Xiuyou Han
Photonics 2022, 9(4), 236; https://doi.org/10.3390/photonics9040236 - 02 Apr 2022
Cited by 2 | Viewed by 1909
Abstract
A large dynamic frequency up-conversion scheme based on parallel dual-drive Mach–Zehnder modulators (DD-MZM) and balance detection is proposed and demonstrated experimentally. By optimizing the distribution ratio of the optical carrier power and the IF signal power between the two DD-MZMs, the third-order intermodulation [...] Read more.
A large dynamic frequency up-conversion scheme based on parallel dual-drive Mach–Zehnder modulators (DD-MZM) and balance detection is proposed and demonstrated experimentally. By optimizing the distribution ratio of the optical carrier power and the IF signal power between the two DD-MZMs, the third-order intermodulation components in two sub-links cancel each other upon the balanced photodetector. The measured results show that the large spurious-free dynamic range of 112.3 dB·Hz4/5 is obtained for an intermediate frequency signal of 2 GHz up-converted to 18 GHz, which is a 14.8 dB enhancement compared with the traditional carrier suppression double-sideband modulation mixer. The frequency up-conversion performance of the established system for the broadband signal is measured with the results demonstrating the feasibility of the proposed optimization scheme. Full article
(This article belongs to the Special Issue Microwave Photonics Applications)
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16 pages, 3418 KiB  
Article
Multilayer Photonic Spiking Neural Networks: Generalized Supervised Learning Algorithm and Network Optimization
by Chentao Fu, Shuiying Xiang, Yanan Han, Ziwei Song and Yue Hao
Photonics 2022, 9(4), 217; https://doi.org/10.3390/photonics9040217 - 25 Mar 2022
Cited by 2 | Viewed by 2216
Abstract
We propose a generalized supervised learning algorithm for multilayer photonic spiking neural networks (SNNs) by combining the spike-timing dependent plasticity (STDP) rule and the gradient descent mechanism. A vertical-cavity surface-emitting laser with an embedded saturable absorber (VCSEL-SA) is employed as a photonic leaky-integrate-and-fire [...] Read more.
We propose a generalized supervised learning algorithm for multilayer photonic spiking neural networks (SNNs) by combining the spike-timing dependent plasticity (STDP) rule and the gradient descent mechanism. A vertical-cavity surface-emitting laser with an embedded saturable absorber (VCSEL-SA) is employed as a photonic leaky-integrate-and-fire (LIF) neuron. The temporal coding strategy is employed to transform information into the precise firing time. With the modified supervised learning algorithm, the trained multilayer photonic SNN successfully solves the XOR problem and performs well on the Iris and Wisconsin breast cancer datasets. This indicates that a generalized supervised learning algorithm is realized for multilayer photonic SNN. In addition, network optimization is performed by considering different network sizes. Full article
(This article belongs to the Special Issue Microwave Photonics Applications)
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12 pages, 3887 KiB  
Communication
Microwave Photonic Signal Generation in an Optically Injected Discrete Mode Semiconductor Laser
by Da Chang, Zhuqiang Zhong, Angel Valle, Wei Jin, Shan Jiang, Jianming Tang and Yanhua Hong
Photonics 2022, 9(3), 171; https://doi.org/10.3390/photonics9030171 - 10 Mar 2022
Cited by 2 | Viewed by 2178
Abstract
In this paper, microwave photonic signal generation based on the period-one dynamic of optically injected discrete mode (DM) semiconductor lasers has been experimentally demonstrated and numerically simulated. The results show that the frequency of the generated microwave increases linearly with the frequency detuning [...] Read more.
In this paper, microwave photonic signal generation based on the period-one dynamic of optically injected discrete mode (DM) semiconductor lasers has been experimentally demonstrated and numerically simulated. The results show that the frequency of the generated microwave increases linearly with the frequency detuning or optical injection ratio. In addition, a single optical feedback loop is sufficient to reduce the microwave linewidth without significantly deteriorating side mode suppression. The simulation results using a model considering the nonlinear dependencies of the carrier recombination agree well with the experimental results, which indicates that the nonlinear carrier recombination effect is important in determining the nonlinear dynamics of optically injected DM lasers. Full article
(This article belongs to the Special Issue Microwave Photonics Applications)
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8 pages, 4463 KiB  
Communication
O-Band Frequency-Tunable (10–22 GHz) Ultra-Low Timing-Jitter (<12-fs) Regenerative Mode-Locked Laser
by Hefei Qi, Zhihao Zhang, Dan Lu, Ruikang Zhang and Lingjuan Zhao
Photonics 2022, 9(3), 169; https://doi.org/10.3390/photonics9030169 - 10 Mar 2022
Cited by 1 | Viewed by 1977
Abstract
A frequency-tunable and low-timing-jitter O-band regenerative mode-locked laser (RMLL) using an optoelectronic oscillation configuration and electric-controlled yttrium iron garnet (YIG) bandpass filter is proposed and demonstrated. In this scheme, an O-band semiconductor optical amplifier (SOA) is used as the gain medium of the [...] Read more.
A frequency-tunable and low-timing-jitter O-band regenerative mode-locked laser (RMLL) using an optoelectronic oscillation configuration and electric-controlled yttrium iron garnet (YIG) bandpass filter is proposed and demonstrated. In this scheme, an O-band semiconductor optical amplifier (SOA) is used as the gain medium of the RMLL to realize a dispersion-management-free operation during frequency tuning. With a polarization-maintaining fiber loop of 300 m, we produced a robust frequency-tunable RMLL with a pulse width below 16 ps, phase noises below −123 dBc/Hz at a 10-kHz frequency offset from the carrier frequency, and timing jitter less than 12 fs (integrated in 1-kHz to 1-MHz range) in a frequency tuning range between 10 GHz and 22 GHz. Full article
(This article belongs to the Special Issue Microwave Photonics Applications)
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10 pages, 1057 KiB  
Article
Experimental Investigation on the Ranging Resolution of a FMCW Lidar
by Zhenzhen Xiao, Zhengmao Wu, Zaifu Jiang, Dianzuo Yue and Guangqiong Xia
Photonics 2022, 9(1), 11; https://doi.org/10.3390/photonics9010011 - 28 Dec 2021
Cited by 5 | Viewed by 2802
Abstract
In some previous reports about frequency-modulated continuous-wave (FMCW) Lidar, observing the longer waveform of a de-chirped signal is considered an effective scheme for further improving the ranging resolution. In this work, the ranging resolution of a FMCW Lidar is experimentally investigated, and the [...] Read more.
In some previous reports about frequency-modulated continuous-wave (FMCW) Lidar, observing the longer waveform of a de-chirped signal is considered an effective scheme for further improving the ranging resolution. In this work, the ranging resolution of a FMCW Lidar is experimentally investigated, and the feasibility of such a scheme is tested. During the experiment, a FMCW signal is generated via a Mach–Zehnder modulator in the transmitted port. In the received port, the de-chirped signal is extracted based on a homodyne detection scheme and is analyzed by an electrical spectrum analyzer. Two different methods are adopted to determine the ranging resolution. One is based on a single target, for which the ranging resolution is obtained through inspecting the shift of spectral peak position as the target moves. The other is based on two targets, for which the ranging resolution is acquired through inspecting the variation of spectrum distribution as the spacing of two targets changes. The experimental results demonstrate that extending the observed duration of the de-chirped signal cannot improve the ranging resolution, and the corresponding physical mechanism is revealed. Full article
(This article belongs to the Special Issue Microwave Photonics Applications)
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Review

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14 pages, 3237 KiB  
Review
Period-One Laser Dynamics for Photonic Microwave Signal Generation and Applications
by Pei Zhou, Nianqiang Li and Shilong Pan
Photonics 2022, 9(4), 227; https://doi.org/10.3390/photonics9040227 - 31 Mar 2022
Cited by 5 | Viewed by 2559
Abstract
Due to the advantages of rich dynamics, small size, and easy integration, semiconductor lasers have many applications in microwave photonics. With a proper perturbation to invoke period-one (P1) nonlinear laser dynamics, a widely tunable microwave signal can be generated. In this paper, we [...] Read more.
Due to the advantages of rich dynamics, small size, and easy integration, semiconductor lasers have many applications in microwave photonics. With a proper perturbation to invoke period-one (P1) nonlinear laser dynamics, a widely tunable microwave signal can be generated. In this paper, we concentrate on the realization and application of photonic microwave signal generation based on the P1 oscillation state of semiconductor lasers. Recent developments in P1 dynamics-based tunable microwave signal generation techniques are reviewed with an emphasis on the optical injection system, which has a large frequency tuning range that is far beyond the intrinsic relaxation oscillation frequency. In order to improve the spectral purity and stability of the generated microwave signal, two typical approaches are introduced, i.e., microwave modulation stabilization, and delayed feedback stabilization. Various applications of the P1 dynamics-based microwave signal generator in diverse signal generation and photonic microwave signal processing are described. Development trends of the P1 dynamics-based photonic microwave signal generator are also discussed. Full article
(This article belongs to the Special Issue Microwave Photonics Applications)
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