Advances in Optical Fiber Sensing Technology

Dear Colleagues,

Optical fiber sensing technologies stand at the forefront of modern sensing systems, offering a paradigm shift in precision measurement and real-time data acquisition. The essence of optical fiber sensing lies in its ability to leverage optical fibers as versatile platforms for detecting, monitoring, and analyzing a myriad of physical parameters. At the heart of optical fiber sensing is the principle of utilizing optical fibers to transmit and receive light signals. This enables the creation of sensors capable of detecting changes in temperature, strain, pressure, and various environmental factors with unprecedented sensitivity. Unlike traditional sensing methods, optical fiber sensors are immune to electromagnetic interference, making them ideal for deployment in challenging and high-performance environments.

This Special Issue aims to publish high-quality papers which study the emerging, important technologies in optical fiber sensing. Research areas may include (but may not be limited to) the following topics:

• Optical fiber sensors;
• Fiber sensing technology;
• Optical signal processing technology;
• Optical fiber sensing systems;
• Optical micro-cavity sensing technology;
• Biochemical micro-nano sensitive sensors;
• Fiber sensors based on functional materials;
• Microstructure fibers;
• Simulation of special fibers.
• We look forward to receiving your contributions.

Prof. Dr. Tao Geng
Prof. Dr. Vladimir Tuz
Dr. Qiang Ling
Dr. Yiwei Ma
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.

• optical fiber sensors
• fiber sensing
• signal processing
• special fibers
• microstructure fibers
• micro/nanofibers
• functional materials
• photorefractive materials

Title: Impacts of hydrostatic pressure on Distributed Temperature Sensing Optical Fibers for extreme ocean and ice environments
Authors: Scott Tyler; Matthew e Silvia; Michael v Jakuba; Brian m Durante; Dale p Winebrenner
Affiliation: University of Nevada Reno
Abstract: Optical fiber is increasingly used for both communication and distributed sensing of temperature and strain in environmental studies. In this work, we demonstrate the viability of unreinforced fiber tethers (bare fiber) for Raman-based distributed temperature sensing in deep ocean and deep ice environments. High pressure testing of single mode and multimode optical fiber showed little to no changes in light attenuation over pressures from atmospheric to 600 bars. Most importantly the differential attenuation between Stokes and anti-Stokes frequencies, critical for the evaluation of distributed temperature sensing, was shown to be insignificantly affected by fluid pressures over the range of pressures tested for single mode fiber, and only very slightly affected in multimode fiber. For multimode fiber deployments to ocean depths as great at 6000 m, the effect of pressure dependent differential attenuation was shown to impact the estimated temperatures by only 0.15 oK. These new results indicate that bare fiber tethers, in addition to use for communication can be used for distributed temperature or strain in fibers subjected to large depth (pressure) varying environments such as deep oceans, glaciers and potentially the icy moons of Saturn and Jupiter.

Title: Towards all-hollow-core-fiberized optical cavities
Author: GAVARA
Highlights: The manuscript presents a mini review of various hollow-core fiber-based optical cavities that have been reported so far. Recent advancements, hollow-core fibers have emerged as a highly promising platform for staging light-matter interactions.