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Editorial Board Members' Collection Series: Optical Fiber Interferometers and Resonators
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Editorial Board Members' Collection Series: Optical Fiber Interferometers and Resonators

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Physical Sensors".

Deadline for manuscript submissions: closed (31 December 2024) | Viewed by 1841

Special Issue Editors

Dr. Saverio Avino

E-Mail Website
Guest Editor
Consiglio Nazionale delle Ricerche, Istituto Nazionale di Ottica (INO), 80078 Pozzuoli, Italy
Interests: fiber-optic sensors; laser interferometry; optical resonators; optical gyroscopes; whispering gallery mode resonators; plasmonics
Dr. Gianluca Gagliardi

E-Mail Website
Guest Editor
Consiglio Nazionale delle Ricerche, Istituto Nazionale di Ottica (INO), Via Campi Flegrei, 34 Comprensorio A. Olivetti, 80078 Pozzuoli, Italy
Interests: laser spectroscopy; fibre-optic sensing; whispering gallery mode resonators; surface plasmon resonance sensors

Special Issue Information

Dear Colleagues,

Optical fibers are widespread and powerful tools for remote, non-invasive sensing of physical, chemical, and biological quantities. Thanks to their peculiar features, they are employed in a myriad of applications in the most disparate fields today.

Optical interferometers and resonators have proven to be the cornerstones of modern science and technology. Their use is crucial in diverse fields, such as physical, chemical, and biological sensing; laser physics and spectroscopy; optical engineering; telecommunications; metrology; and fundamental physics. Depending on the application, a variety of geometries and materials have been adopted to fabricate suitable sensors: from standard bench-top mirrors to optical integrated systems, from any sort of laser to optical fiber and planar waveguides, from photonic crystals and nanostructures to dielectric and plasmonic architectures.

The aim of this Special Issue is to highlight the most recent scientific results on fiber-optic sensors enhanced by different optical designs, materials, and interrogation techniques harnessing optical interference and resonance phenomena. Fields of applications include, but are not limited to, fundamental and applied physics, quantum sensing, engineering, chemistry, biology, medicine, environment, structural and industrial monitoring, health, mobility, security, agriculture, and blue and green technologies.

Dr. Saverio Avino
Dr. Gianluca Gagliardi
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. Sensors 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 2600 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

  • fiber-optic sensors
  • laser interferometry
  • laser spectroscopy
  • optical resonators
  • optical gyroscopes
  • whispering gallery mode resonators
  • plasmonics

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Published Papers (2 papers)

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Research

12 pages, 5719 KiB  
Article
Compensation Method Based on Phase Shift Between Pins of Crystal Resonator
by Zhiqi Li, Jiale Peng, Miao Miao and Zicong Wang
Sensors 2025, 25(3), 932; https://doi.org/10.3390/s25030932 - 4 Feb 2025
Viewed by 544
Abstract
This paper presents a new method to improve the long-term frequency stability of an oven-controlled crystal oscillator (OCXO) without an external reference source. The frequency drift of the crystal oscillator can be obtained in real time by measuring the phase shift between the [...] Read more.
This paper presents a new method to improve the long-term frequency stability of an oven-controlled crystal oscillator (OCXO) without an external reference source. The frequency drift of the crystal oscillator can be obtained in real time by measuring the phase shift between the pins of the crystal resonator. In this paper, according to an equivalent circuit of a crystal oscillator, a linear equivalent mathematical model based on the phase shift of the crystal resonator and the output frequency is established. The experiments were conducted to observe the relation between the phase shift and frequency drift of the OCXO. At the same time, a crystal oscillator self-calibration frequency control system is established to improve the frequency drift of the OCXO. The results show that this method can effectively improve the drift of OCXOs. The OCXO drift rate was significantly improved from 1.53 10−10/day to 9.8 10−12/day, and after three days, it settled at 5.24 10−11. The long-term frequency stability also underwent remarkable improvement, from 1.16 10−11/1000 and 3.24 10−11/10,000 to 3.47 10−12/1000 and 1.05 10−11/10,000. Full article
(This article belongs to the Special Issue Editorial Board Members' Collection Series: Optical Fiber Interferometers and Resonators)
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13 pages, 4299 KiB  
Article
Design of a Nested Hollow-Core Anti-Resonant Fiber Sensor for Simultaneous Measurement of Temperature and Strain
by Yueyu Xiao and Jiayao Cheng
Sensors 2024, 24(23), 7805; https://doi.org/10.3390/s24237805 - 6 Dec 2024
Cited by 2 | Viewed by 791
Abstract
A highly sensitive sensor, which can detect the temperature and strain simultaneously, is proposed using a hollow-core anti-resonant fiber with composite nested tubes. The sensing fiber contains two kinds of nested tubes, and two different sensing mechanisms, the resonance coupling effect and the [...] Read more.
A highly sensitive sensor, which can detect the temperature and strain simultaneously, is proposed using a hollow-core anti-resonant fiber with composite nested tubes. The sensing fiber contains two kinds of nested tubes, and two different sensing mechanisms, the resonance coupling effect and the intermodal interference, are realized in the same section of a hollow-core anti-resonant fiber fully filled with ethanol. Five conjoined nested anti-resonant tubes are introduced to suppress the confinement loss of the higher-order mode LP02. One hybrid conjoined nested tube, which consists of a half-circular anti-resonant tube and a half-circular resonant tube, is introduced to induce a resonant coupling between the LP02 mode in the core and the dielectric mode in the nested resonant tubes. Numerical investigations demonstrate the shifts of the feature wavelengths of the resonance coupling effect, and the intermodal interference shows different velocities with temperature and strain, while a simultaneous measurement of temperature and strain can be realized with high sensitivities (3.36 nm/°C and −0.003 nm/με to temperature and strain, respectively). Since the sensor can be fabricated by full infiltration with liquid into the large-size core and cladding tubes of hollow-core anti-resonant fibers, and special post-processing, such as selective infiltration or coating, is notneeded. The proposed sensors based on hollow-core anti-resonant fibers with functional liquid infiltration provide a more efficient and versatile platform for the temperature and strain sensing. Full article
(This article belongs to the Special Issue Editorial Board Members' Collection Series: Optical Fiber Interferometers and Resonators)
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