An ultrasensitive refractive index (RI) sensing technology based on an enhanced Vernier effect is proposed, which integrates a polymer Fabry-Perot interferometer (FPI) with an open cavity FPI on the tip of a seven-core optical fiber. Interference spectra of the polymer FPI and the open cavity FPI shift to opposite directions as the ambient RI changes, thus leading to the enhanced Vernier effect. Investigations of RI sensitivity and temperature dependence of the proposed fiber sensors are carried out. Taking advantage of the enhanced Vernier effect, we demonstrate a remarkable sensitivity of 19742.86 nm/RIU within the RI range from 1.39 to 1.395. The sensor exhibits substantial advantages such as ease of fabrication, compact structure, high sensitivity, and good repeatability, providing a practical and competitive solution for RI sensing.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/OL.547178 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
An ultrasensitive refractive index (RI) sensing technology based on an enhanced Vernier effect is proposed, which integrates a polymer Fabry-Perot interferometer (FPI) with an open cavity FPI on the tip of a seven-core optical fiber. Interference spectra of the polymer FPI and the open cavity FPI shift to opposite directions as the ambient RI changes, thus leading to the enhanced Vernier effect. Investigations of RI sensitivity and temperature dependence of the proposed fiber sensors are carried out.
View Article and Find Full Text PDFEnhanced Vernier Effect in Cascaded Fiber Loop Interferometers for Improving Temperature Sensitivity.
Sensors (Basel)
December 2024
Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communication, Institute of Photonics Technology, Jinan University, Guangzhou 510632, China.
Article Synopsis
- The study introduces a high-sensitivity temperature sensing system that leverages an enhanced Vernier effect using cascaded fiber loop interferometers.
- The new system overcomes limitations in traditional methods by manipulating two free spectrum ranges (FSRs) to simultaneously increase and decrease their values with temperature changes.
- Experimental results show that this enhanced system achieves a temperature sensitivity of 618.14 kHz/°C, which is significantly higher than both traditional methods and existing microwave interferometry systems, making it ideal for applications in fields like biometrics and smart technology.
Neurovascular anatomy of the platysma muscle for blepharoptosis repair: a cadaveric study.
Surg Radiol Anat
November 2024
Department of Plastic and Reconstructive Surgery, University of Health Sciences Türkiye, Gülhane Training and Research Hospital, Ankara, Turkey.
Purpose: This study aimed to define a new surgical method using a neurotized platysma free flap to provide dynamic reanimation, enhanced functional recovery, and low morbidity for blepharoptosis repair.
Methods: Ten hemifaces and neck halves of five formalin-fixed cadavers were included in the study. The origin of the neurovascular structures of the pedicle was identified at the submandibular triangle.
Article Synopsis
- A novel optical fiber sensor has been developed for detecting dissolved ammonia in water using the Vernier effect, which improves sensitivity.
- The sensor features a sensing Fabry-Perot interferometer (S-FPI) filled with a specialized resin and a sealed reference interferometer (R-FPI) made from different types of optical fibers.
- Experimental findings show that this sensor is highly sensitive, with a detection sensitivity of 0.34 nm/ppm for ammonia concentrations between 5 and 40 ppm, significantly outperforming traditional methods.
Article Synopsis
- Researchers developed a new fiber optic Fabry-Perot interferometer (FPI) humidity sensor using polyvinyl alcohol (PVA) combined with graphene quantum dots (GQDs), which was tested for effectiveness.
- Doping PVA with GQDs enhanced humidity sensitivity by 2.1 times compared to standard PVA, achieving sensitivity levels of -3.1527 nm/%RH for the Vernier effect sensor and 7.3343 nm/%RH for the harmonic Vernier effect sensor.
- The study concluded that PVA-GQDs are highly effective humidity-sensitive materials with minimal temperature interference, indicating their potential for various humidity sensing applications.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!