98%
921
2 minutes
20
A fiber optic surface plasmon resonance (SPR) sensor based on a silver-coated large-core suspended-core fiber was proposed. A dynamic chemical liquid phase deposition method was adopted to fabricate a set of proposed sensors with different silver layer thicknesses. A stable fully spiced all-fiber sensing system was established to evaluate the performance of the fabricated sensors. The results show that the proposed sensor with a thicker silver layer exhibits higher sensitivity and figure of merit. The performance of the proposed sensor is comparable to those of the conventional solid-core fiber and hollow fiber SPR sensors and much higher than that of the metal nanoparticle functionalized suspended-core fiber sensors.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1364/OL.44.004550 | DOI Listing |
Octave-spanning supercontinuum (SC) generation typically requires high input pulse energies and long fiber lengths. Achieving such high pulse energies is feasible only with low repetition rate lasers, operating in the kHz to MHz range. In contrast, high repetition rate lasers, such as microresonator-based frequency combs (microcombs), provide lower input pulse energy.
View Article and Find Full Text PDFSpectrochim Acta A Mol Biomol Spectrosc
May 2025
Biophotonics@Tyndall National Institute, UCC, Dyke Parade, Cork, T12R5CP, Ireland. Electronic address:
Oral potentially malignant disorders (OPMD) serve as early indicators of oral cancer. These conditions require reliable, non-invasive and real-time diagnostic methods for effective detection and screening. Saliva, as an easily accessible and non-invasive biofluid, has emerged as a promising tool to detect OPMD-associated biomarkers.
View Article and Find Full Text PDFA refractive index (RI) and temperature dual-parameter sensor, based on a side-polished hole-assisted dual-core fiber (HADCF), has been proposed. In this sensor, SnO film has been deposited on the suspended core of HADCF by RF sputtering to produce loss mode resonance (LMR). The energy of the center core has been shown to be able to be coupled into the suspended core, taking advantage of the small distance involved and phase matching between two cores.
View Article and Find Full Text PDFSurface enhanced Raman spectroscopy (SERS) is one of the most sensitive biosensing techniques that offers label free detection for a variety of applications. Generally, SERS spectroscopy is performed on nano-functionalized planar substrates with plasmonic structures or colloidal nanoparticles. Recently, photonic crystal fibers (PCFs) have gained great interest for SERS based bio sensing applications due to the immense advantages such as improved sensitivity, flexibility and remote sensing capability that it offers compared to the planar substrates.
View Article and Find Full Text PDFSensors (Basel)
December 2023
School of Information Science and Engineering, Fudan University, 220 Handan Rd, Shanghai 200433, China.
In this paper, the silver-coated large-core suspended-core fiber (LSCF) probe was fabricated by the dynamic chemical liquid phase deposition method for surface-enhanced Raman scattering (SERS) sensing. The 4-mercaptophenylboronic acid (4-MPBA) monolayer was assembled in the LSCF as the recognition monolayer. Taking advantage of the appropriate core size of the LSCF, a custom-made Y-type optical fiber patch cable was utilized to connect the semiconductor laser, Raman spectrometer, and the proposed fiber SERS probe.
View Article and Find Full Text PDF