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Photonics
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Microwave Photonics II
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Microwave Photonics II

A special issue of Photonics (ISSN 2304-6732). This special issue belongs to the section "New Applications Enabled by Photonics Technologies and Systems".

Deadline for manuscript submissions: closed (31 October 2022) | Viewed by 7143

Special Issue Editors

Prof. Dr. Antonella Bogoni

E-Mail Website
Guest Editor
Integrated Research Center for Photonic Networks Technologies, Photonic Networks National Laboratory – CNIT, Pisa, Italy
Interests: microwave photonics; ultra-fast optical communications; photonic digital processing and nonlinear optics
Special Issues, Collections and Topics in MDPI journals
Dr. Thomas R. Clark

E-Mail Website
Guest Editor
Applied Physics Laboratory, John Hopkins University, Laurel, MD 20723, USA
Interests: array signal processing; beam steering; integrated optics; microwave photonics; antenna phased arrays; optical delay lines; optical resonators; frequency agility; Bragg gratings; amplitude shift keying; antenna radiation patterns; broadband antennas; delay lines; digital radio; dipole antenna arrays; genetic algorithms; intermodulation; linear antenna arrays; millimetre wave antenna arrays; nonlinear optics; optical communication equipment; optical design techniques; optical links; optical losses; optical modulation

Special Issue Information

Dear Colleagues,

"Microwave photonics" deals with photonics applied to radio frequency systems, as an enabling technology used for the generation, reception, processing and distribution of radio frequency signals before reaching the antenna or after being received from the antenna. Research around the world already demonstrated the huge potential of microwave photonics in radio frequency systems, due to its intrinsic large bandwidth, electro-magnetic interference robustness, low-loss distribution in optical fibers, and low power consumption and footprint if integrated photonics technologies are exploited.

Application fields of microwave photonics range from communications (i.e., 6G) and sensing (radar) in all aspects of our life (security, automotive, space, industry, environment monitoring, health, etc.).

New materials and technological platforms for photonic integration, new integrated photonic circuits and new microwave photonics systems must be developed in order to fully exploit the potential of microwave photonics and translate it into commercial products.

This Special Issue aims to collect the main advances in this field to support cross-fertilization and interaction in the microwave photonics community.

Prof. Dr. Antonella Bogoni
Dr. Thomas R. Clark
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

  • integrated photonics
  • photonics for radio frequency
  • photonics-based radar
  • radio over fiber systems
  • silicon photonics
  • terahertz signals

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Published Papers (3 papers)

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Research

9 pages, 2104 KiB  
Communication
A Simple Photonic System for DFS and AOA Simultaneous Measurement
by Xintong Li, Jinming Tao, Jinye Li, Qianqian Jia, Chaoquan Wang and Jianguo Liu
Photonics 2022, 9(12), 980; https://doi.org/10.3390/photonics9120980 - 14 Dec 2022
Cited by 4 | Viewed by 1824
Abstract
A simple photonics-based dual-channel system is proposed to simultaneously measure the Doppler frequency shift (DFS) and angle of arrival (AOA) of microwave signals. The system applies two parallel push–pull Mach–Zehnder modulators (MZMs) for carrier suppression dual-sideband (CS-DSB) modulation. The introduction of the reference [...] Read more.
A simple photonics-based dual-channel system is proposed to simultaneously measure the Doppler frequency shift (DFS) and angle of arrival (AOA) of microwave signals. The system applies two parallel push–pull Mach–Zehnder modulators (MZMs) for carrier suppression dual-sideband (CS-DSB) modulation. The introduction of the reference signal results in a DFS measurement without direction ambiguity. The DFS can be determined by measuring the frequency of the down-converted intermediate frequency (IF) signal, and the AOA can be calculated by comparing the phase shift of the two channels. A proof-of-concept experiment shows that the DFS measurement error is less than 0.4 Hz during ±100 kHz, and the AOA measurement error is within 1.5° in a range of 0–70°. Full article
(This article belongs to the Special Issue Microwave Photonics II)
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14 pages, 3127 KiB  
Communication
An Optical Front-End for Wideband Transceivers Based on Photonic Time Compression and Stretch
by Yukang Zhang and Hao Chi
Photonics 2022, 9(9), 658; https://doi.org/10.3390/photonics9090658 - 15 Sep 2022
Cited by 1 | Viewed by 1967
Abstract
This study proposes an optical front-end for wideband transceivers based on photonic time compression (PTC) and photonic time stretch (PTS) techniques. The PTC and PTS systems within a transceiver generate and receive wideband RF signals, respectively, which expand the processible signal bandwidth. We [...] Read more.
This study proposes an optical front-end for wideband transceivers based on photonic time compression (PTC) and photonic time stretch (PTS) techniques. The PTC and PTS systems within a transceiver generate and receive wideband RF signals, respectively, which expand the processible signal bandwidth. We present analytical models for characterizing the optical front-end based on the PTC and PTS. The design of the front-end for signal generation and reception is also discussed, in which we emphasize the bandwidth match between the PTC-based transmitter and PTS-based receiver through an appropriate dispersion configuration. We conducted experiments on PTC and PTS systems with a single channel. Further simulation results for PTC and PTS systems with multiple channels for continuous-time operation are presented. The proposed front-end based on time compression/stretch can largely improve the signal bandwidth in systems using inexpensive low-speed analogue/digital converters. Full article
(This article belongs to the Special Issue Microwave Photonics II)
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13 pages, 3579 KiB  
Article
A Microwave Photonic Converter with High in-Band Spurs Suppression Based on Microwave Pre-Upconversion
by Chaoquan Wang, Yiru Zhao, Zeping Zhao, Weijie Zhang, Wenyu Wang, Qianqian Jia and Jianguo Liu
Photonics 2022, 9(6), 388; https://doi.org/10.3390/photonics9060388 - 30 May 2022
Cited by 1 | Viewed by 2636
Abstract
A microwave photonic converter based on microwave pre-upconversion is proposed and experimentally demonstrated. Only a single Mach–Zehnder modulator (MZM) is used in the converter system so that the complexity and bandwidth limiting of the link can be reduced. The transmitted and received signals [...] Read more.
A microwave photonic converter based on microwave pre-upconversion is proposed and experimentally demonstrated. Only a single Mach–Zehnder modulator (MZM) is used in the converter system so that the complexity and bandwidth limiting of the link can be reduced. The transmitted and received signals before entering the MZM are firstly upconverted to high frequency (HF) by a microwave upconverter. The HF and local oscillator (LO) signals are combined to drive the MZM. Carrier-suppressed double-sideband (CS-DSB) modulation is introduced to the MZM for effective spectrum utilization. Then, the target signals can be obtained by photoelectric conversion and beating. Experimental results confirm that the mixing spurs including harmonics and intermodulation as well as original signals are all out of system frequency band from 0.8–18 GHz, and the in-band spurious suppression of at least 40 dBc is achieved. In addition, the spurious-free dynamic range (SFDR) reaches 86.23 dB·HZ2/3 for upconversion and 80.95 dB·HZ2/3 for downconversion. The proposed microwave photonic converter provides a wideband and high-purity alternative for the applications of radars and signal processing. Full article
(This article belongs to the Special Issue Microwave Photonics II)
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