The measurement of small changes in the refractive index (RI) leads to a comprehensive
analysis of different biochemical substances, paving the way to non-invasive and cost …

Tunable add/drop filter based optical interconnects are an integral part of data centers as
well as optical communications. Although add/drop filters based on ring resonators and …

To the best of our knowledge, we are the first to report the existence of two dispersion
turning points (DTPs) in an optimized planar waveguide long-period grating (LPG) sensor …

Accurate probing, monitoring, and controlling the pH level is critical in different fields. In the
last two decades, optical fiber/waveguide-based pH sensors have been widely investigated …

A compact and highly sensitive liquid refractive index (RI) sensor using Vernier effect
achieved with embedded double-ring resonator is proposed and demonstrated. Unlike …

In this paper we are proposing a novel and highly sensitive refractive index sensor based on
cladding mode transition in a high index coated ridge waveguide with long period grating …

For two simultaneously varying external perturbation parameters, namely, temperature and
strain, we propose and theoretically demonstrate a novel, to the best of our knowledge …

We propose and demonstrate a cost-effective liquid refractive index (RI) sensor in polymer
materials by employing a Mach-Zehnder interferometer (MZI) formed with the conventional …

A highly sensitive temperature sensor based on a long period grating (LPG) written metal
clad ridge waveguide (MCRW) with poly-dimethylsiloxane (PDMS) surrounding is proposed …

In this article, we propose and theoretically analyze a novel sensor structure for bulk
refractive index (RI) and bio-layer sensing applications. The sensor utilizes a directional …