Investigation of an in-line slot waveguide sensor built in a tapered D-shaped silicon-cored fiber
Journal
Sensors
Journal Volume
21
Journal Issue
23
Date Issued
2021
Author(s)
Lin K.-J
Abstract
An in-line slot waveguide sensor built in a polished flat platform of a D-shaped silicon cored fiber with a taper coupled region is proposed and investigated thoroughly. Simulation results show that the single-mode light field sustained in the silicon cored fiber can be efficiently transferred to the slot waveguides through the tapered region. The geometry parameters of the slot waveguide sensors are optimized to have the corresponding highest power confinement factors and the resultant sensor sensitivities. The three-slot waveguide sensor is found to have the best performance among one-, two-and three-slot waveguides at the mid-IR wavelength. ? 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Subjects
D-shaped
Sensors
Silicon cored fibers
Slot waveguides
Fibers
Waveguides
Confinement factor
Geometry parameter
High power
Light fields
Sensor sensitivity
Silicon cored fiber
Single-mode light
Slot waveguide
Waveguide sensors
Silicon
Type
journal article