Exposed-core fiber multimode interference sensor

Osório, Jonas H.; Guimarães, William M.; Lü, Peng; Franco, Marcos A. R.; Warren‐Smith, Stephen C.; Ebendorff‐Heidepriem, Heike; Cordeiro, Cristiano M. B.

doi:10.1016/j.rio.2021.100125

Cited by 7 publications

(2 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this context, a plausible path towards a practical realization of the sensor would be to splice a millimeter-long HCPCF section in between standard solid-core optical fibers, as this method would allow for the high loss transmission spectral regions to be suitably assessed and for the curvature conditions to be applied to the fiber. Indeed, the routines for splicing short fiber lengths are well established in multimode interference devices technology [44,45] and could be customized for HCPCF. Additionally, the recent results on high-quality HCPCF interconnections [36,37] demonstrate that the fiber proposed in this manuscript can be adequately integrated with standard solid-core optical fibers.…”

Section: Methodsmentioning

confidence: 99%

Angle-Resolved Hollow-Core Fiber-Based Curvature Sensing Approach

Guimarães¹,

Cordeiro

Franco³

et al. 2021

Fibers

Self Cite

View full text Add to dashboard Cite

We propose and theoretically study a new hollow-core fiber-based curvature sensing approach with the capability of detecting both curvature radius and angle. The new sensing method relies on a tubular-lattice fiber that encompasses, in its microstructure, tubes with three different thicknesses. By adequately choosing the placement of the tubes within the fiber cross-section, and by exploring the spectral shifts of the fiber transmitted spectrum due to the curvature-induced mode field distributions’ displacements, we demonstrate a multi-axis curvature sensing method. In the proposed platform, curvature radii and angles are retrieved via a suitable calibration routine, which is based on conveniently adjusting empirical functions to the fiber response. Evaluation of the sensing method performance for selected cases allowed the curvature radii and angles to be determined with percentual errors of less than 7%. The approach proposed herein provides a promising path for the accomplishment of new curvature sensors able to resolve both the curvature radius and angle.

show abstract

Section: Methodsmentioning

confidence: 99%

Angle-Resolved Hollow-Core Fiber-Based Curvature Sensing Approach

Guimarães¹,

Cordeiro

Franco³

et al. 2021

Fibers

Self Cite

View full text Add to dashboard Cite

show abstract

“…A biosensor has been developed based on MZI through the tapered fiber by the coatings of specific layer over the tapered region of SMF [68]. Additionally, the splicing of several specially designed optical fibers with SMF, also produces MZI like SMF-multimode fiber (MMF)-SMF [69], SMF-photonic crystal fiber (PCF)-SMF [70], and SMF-hollow core fiber (HCF)-SMF structure [71]. The biosensing using these structures can be achieved by immobilizing target-specific sensing medium over the special optical fiber region.…”

Section: Interference Based Optical Fiber Sensorsmentioning

confidence: 99%

Optical Biomedical Diagnostics Using Lab-on-Fiber Technology: A Review

2022

View full text Add to dashboard Cite

Point-of-care and in-vivo bio-diagnostic tools are the current need for the present critical scenarios in the healthcare industry. The past few decades have seen a surge in research activities related to solving the challenges associated with precise on-site bio-sensing. Cutting-edge fiber optic technology enables the interaction of light with functionalized fiber surfaces at remote locations to develop a novel, miniaturized and cost-effective lab on fiber technology for bio-sensing applications. The recent remarkable developments in the field of nanotechnology provide innumerable functionalization methodologies to develop selective bio-recognition elements for label free biosensors. These exceptional methods may be easily integrated with fiber surfaces to provide highly selective light-matter interaction depending on various transduction mechanisms. In the present review, an overview of optical fiber-based biosensors has been provided with focus on physical principles used, along with the functionalization protocols for the detection of various biological analytes to diagnose the disease. The design and performance of these biosensors in terms of operating range, selectivity, response time and limit of detection have been discussed. In the concluding remarks, the challenges associated with these biosensors and the improvement required to develop handheld devices to enable direct target detection have been highlighted.

show abstract