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Applied Sciences
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New Chances of Optical Fiber Network
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New Chances of Optical Fiber Network

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Electrical, Electronics and Communications Engineering".

Deadline for manuscript submissions: closed (20 October 2022) | Viewed by 4683

Special Issue Editors

Dr. Bo Wang

E-Mail Website
Guest Editor
Department of Precision Instrument, Tsinghua University, Beijing 100084, China
Interests: space-time and standards technology; synchronization and timing network; fiber network sensing
Prof. Dr. Guiling Wu

E-Mail Website
Guest Editor
School of Electronic Information and Electrical Engineering, Shanghai Jiaotong University, Shanghai, China
Interests: optical time and frequency transfer; microwave photonic signal processing; optical switching and networking
Dr. Dong Hou

E-Mail Website
Guest Editor
School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
Interests: optical and microwave transfer; optical and microwave measurement; time and frequency transfer; femtosecond laser
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The United Nations (UN) General Council has announced that 2022 is formally designated as the UN International Year of Glass. It shows glass’s essential role in human life and the prospect of further exploring its hidden functions in more and more areas. As a special form of glass, optical fiber has profound effects on human lives; optical fiber networks have become one of the largest infrastructures in the world. How to make the best use of this widespread fiber network has been the subject of intense scholarly debate. In addition to the basic telecommunication function, several new chances of optical fiber network have been studied in recent years. Therefore, this Special Issue is intended for the presentation of new ideas and experimental results of these new chances, such as synchronization and timing network, quantum key distribution network, urban fiber network sensing, distributed acoustic sensing network, next-generation seismic network, phased array observation/radio telescope array based on fiber network, and all areas relevant to hidden functions of optical fiber network.

Dr. Bo Wang
Prof. Dr. Guiling Wu
Dr. Dong Hou
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. Applied Sciences is an international peer-reviewed open access semimonthly 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

  • synchronization and timing network
  • quantum key distribution network
  • urban fiber network sensing
  • distributed acoustic sensing network
  • next-generation seismic network
  • phased array observation / radio telescope array based on fiber network

Published Papers (3 papers)

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Research

15 pages, 2837 KiB  
Article
Performance Analysis and Sensor-Target Geometry Optimization for TOA and TDOA-Based Hybrid Source Localization Method
by Guoning Ma, Zhijiang Huang, Ming Wang, Zhengyu Ji, Xianglu Li, Bo Shen and Jie Tian
Appl. Sci. 2022, 12(24), 12977; https://doi.org/10.3390/app122412977 - 17 Dec 2022
Cited by 3 | Viewed by 1277
Abstract
Currently, the performance analysis of positioning algorithms and optimization of ground station deployment schemes are predominantly based on pure TOA or TDOA measurement information, and the relevant theoretical analysis is primarily the geometric analysis of optimal station deployment for fixed point targets, with [...] Read more.
Currently, the performance analysis of positioning algorithms and optimization of ground station deployment schemes are predominantly based on pure TOA or TDOA measurement information, and the relevant theoretical analysis is primarily the geometric analysis of optimal station deployment for fixed point targets, with few placement ranges and amount of station constraints. In practice, however, there are typically several measurements from TOA and TDOA stations, with a focus on positioning precision within a certain region or line trajectory, as well as the necessity for constraints on the ground station placement range. This paper proposes an efficient method for hybrid source localization using TOA and TDOA measurement information, establishes a mathematical model for hybrid source localization based on TOA and TDOA measurement information, derives and simulates the Gauss–Newton iterative localization algorithm with the least squares criterion, and performs a theoretical analysis of the least squares error and CRLB boundary to improve the accuracy of target localization in the aforementioned scenarios. Taking the average CRLB value of target line trajectory positioning error as the objective function, the ground station placement scheme of TOA- and TDOA-receiving sensors is optimized by utilizing a Genetic Algorithm with strong global optimization capability under the constraints of station placement range and station quantities, and a station placement geometry with better performance than typical station placement is obtained. Meanwhile, we summarize the general placement principles for TOA and TDOA hybrid source localization of target line trajectories. Full article
(This article belongs to the Special Issue New Chances of Optical Fiber Network)
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10 pages, 2503 KiB  
Article
Femtosecond-Level Frequency Transfer at 10 GHz over Long Fiber Link with Optical–Electronic Joint Compensation
by Wantao Huang, Yang Li, Peng Zhang, Lujun Fang and Dong Hou
Appl. Sci. 2022, 12(21), 11262; https://doi.org/10.3390/app122111262 - 7 Nov 2022
Cited by 2 | Viewed by 1471
Abstract
We report a fiber-optic 10 GHz frequency transfer technique based on an optical–electronic joint phase compensator. A highly stable frequency signal at 10 GHz was transferred in a 50-km long fiber link by using this technique. Two key parameters of the frequency dissemination, [...] Read more.
We report a fiber-optic 10 GHz frequency transfer technique based on an optical–electronic joint phase compensator. A highly stable frequency signal at 10 GHz was transferred in a 50-km long fiber link by using this technique. Two key parameters of the frequency dissemination, the timing fluctuation and frequency stability were both measured. The experimental results show the root-mean-square timing fluctuation of the transferred microwave is about 103 fs within 10,000 s, and the frequency stability for the transmission link is 2.2 × 10−14 at 1 s and 8.5 × 10−17 at 2000 s. The technique proposed in this paper provides a powerful tool which can be used to transfer atomic clocks (e.g., commercial H-master and Cs clocks) in a long fiber link. Full article
(This article belongs to the Special Issue New Chances of Optical Fiber Network)
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11 pages, 1963 KiB  
Article
Frequency Conversion Interface towards Quantum Network: From Atomic Transition Line to Fiber Optical Communication Band
by Shujing Li, Jiaxin Bao, Qiqi Deng, Lirong Chen and Hai Wang
Appl. Sci. 2022, 12(13), 6522; https://doi.org/10.3390/app12136522 - 27 Jun 2022
Cited by 2 | Viewed by 1495
Abstract
Quantum repeater is a key component of quantum network, and atomic memory is one of the important candidates for constructing quantum repeater. However, the atomic transition wavelength is not suitable for long-distance transmission in optical fiber. To bridge atomic memory and fiber communication, [...] Read more.
Quantum repeater is a key component of quantum network, and atomic memory is one of the important candidates for constructing quantum repeater. However, the atomic transition wavelength is not suitable for long-distance transmission in optical fiber. To bridge atomic memory and fiber communication, we demonstrate a frequency conversion interface from rubidium D1 line (795 nm) to the optical communication L-band (1621 nm) based on difference frequency generation. To reduce broadband noise of spontaneous Raman scattering caused by strong pumping light, we use a combination of two cascaded etalons and a Fabry-Perot cavity with low finesse to narrow the noise bandwidth to 11.7 MHz. The filtering system is built by common optical elements and is easy to use; it can be widely applied in frequency conversion process. We show that the signal-noise ratio of the converted field is good enough to reduce the input photon number below 1 under the condition of low external device conversion efficiency (0.51%) and large duration of input pulse (250 ns). The demonstrated frequency conversion interface has important potential application in quantum networks. Full article
(This article belongs to the Special Issue New Chances of Optical Fiber Network)
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