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Photonics
Special Issues
Optical Fiber Devices: Technologies and Applications
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Optical Fiber Devices: Technologies and Applications

A special issue of Photonics (ISSN 2304-6732).

Deadline for manuscript submissions: 20 August 2024 | Viewed by 965

Special Issue Editor

Dr. Sergi García

E-Mail Website
Guest Editor
Photonics Research Labs, iTEAM Research Institute, Universitat Politècnica de València, Valencia, Spain
Interests: optical communications; microwave photonics; signal processing

Special Issue Information

Dear Colleagues,

Beyond playing a primary role as distribution elements in global communications networks, optical fiber technologies can enable many other essential functionalities, such as signal processing, distributed sensing, chromatic dispersion compensation, optical amplification, or signal generation. They find applications in a wide range of scenarios, including optical distribution networks, next-generation fiber–wireless communications, broadband measurement instrumentation, medical imaging, or optical coherence tomography. In recent decades there has been increasing interest in developing novel optical fibers to support multiple functionalities, such as those mentioned above. More recently, the inclusion of the space dimension in optical fiber technologies to increase the transmission capacity per fiber has opened the way to the development of new optical fibers and optical fiber devices to enable these signal processing functionalities.

This Special Issue invites manuscripts that introduce recent advances in “Optical Fiber Devices: Technologies and Applications”. All theoretical, numerical, and experimental papers are accepted. Topics include, but are not limited to, optical fiber communications, sensing, and signal processing exploiting:

  • Microwave and teraherz photonics;
  • Fiber sensing;
  • Specialty optical fibers for communications and signal processing;
  • Space division multiplexed fibers;
  • Fiber Bragg gratings;
  • Optical coherence tomography;
  • Nonlinear optical fibers.

Dr. Sergi García
Guest Editor

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

  • optical fiber communications
  • signal processing
  • microwave photonics
  • optical fiber devices
  • fiber sensing
  • specialty optical fibers
  • optical coherence tomography
  • fiber Bragg gratings

Published Papers (1 paper)

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Research

15 pages, 5461 KiB  
Article
Five-Step Phase-Shift-Based Multiwavelength Averaging for Extrinsic Fabry–Perot Interferometric Sensors
by Zheng Liu, Qiong Yao, Ji Xia, Gang Liu, Shuidong Xiong and Qingkai Hou
Photonics 2023, 10(10), 1076; https://doi.org/10.3390/photonics10101076 - 25 Sep 2023
Viewed by 720
Abstract
In order to address issues such as low demodulation accuracy, large demodulation errors, small dynamic range, and complex algorithms for the extrinsic Fabry–Perot interferometric (EFPI) sensor, a five-step phase-shift algorithm based on a multiwavelength (MW)-averaging method is proposed to improve demodulation speed, noise [...] Read more.
In order to address issues such as low demodulation accuracy, large demodulation errors, small dynamic range, and complex algorithms for the extrinsic Fabry–Perot interferometric (EFPI) sensor, a five-step phase-shift algorithm based on a multiwavelength (MW)-averaging method is proposed to improve demodulation speed, noise stability, dynamic range, and noise suppression. The proposed demodulation method utilizes white-light interferometry (WLI) technology to acquire the reflection spectra and extract the five-step phase-shift signals at Ns consecutive operating points. The demodulation results of Ns sets of five-step phase-shift signals are averaged to obtain the average demodulated phase and cavity length variation. Theoretical analysis demonstrates the significant effects of the MW demodulation method on demodulation parameter errors and noise suppression. Particularly, when the demodulation parameter θ = π/2 rad, the method exhibits excellent stability against demodulation parameter error-induced instability. Moreover, it greatly improves noise suppression and reduces noise fluctuations. Numerical simulations are conducted to validate the performance of the proposed demodulation method. Compared with the traditional single-wavelength (SW) five-step phase-shifting demodulation method, the MW demodulation method exhibits stronger noise- and harmonic-suppression capabilities as the number of averaging wavelengths Ns increases. The harmonic distortion of the MW demodulation method with Ns = 128 is 20 dB lower than that of the SW demodulation method, and the noise is 15 dB lower. Furthermore, the proposed method effectively suppresses the influence of demodulation parameter errors on signal demodulation. This proposed demodulation method has the potential for fast real-time dynamic demodulation. It has great significance and application in the field of weak signal detection in fiber-optic sensors with interferometer structures and has enormous advantages in noise-suppression in complex environments. Full article
(This article belongs to the Special Issue Optical Fiber Devices: Technologies and Applications)
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