Optical sensors are widely used for refractive index measurement in chemical, biomedical,
and food processing industries. Due to specific field distribution of the resonances, optical …

Thanks to the peculiarities of optical fiber and its ability to be combined with
nanotechnology, precise and accurate measurements of the changes in optical properties …

Featured Application This article is an extensive overview of the different types of in-fiber
interferometric-based sensors and their technology. Abstract In-fiber interferometric-based …

This work reports on a novel in-fiber Mach-Zehnder interferometer (MZI) device which is able
to exploit the mode transition phenomena to tailor the sensitivity to external refractive index …

A Mach-Zehnder interferometer (MZI) based fiberoptic refractive index (RI) sensor is
constructed by uniformly tapering standard single mode fiber (SMF) for RI measurement. A …

This paper proposes and demonstrates an ultrasensitive refractive index (RI) sensor based
on harmonic Vernier effect (HEV) and a cascaded Fabry–Perot interferometer (FPI). The …

Compact interferometers based on waveguiding structures have found countless
applications in refractive index measurements, chemical sensing, as well as temperature …

We proposed a bent core-offset in-line fiber Mach-Zehnder interferometer for refractive index
(RI) sensing. It was fabricated by the splicing method and consists of a standard single …

This review focuses on the preparation methods and wide applications of optic fiber sensors
based on core-offset structure. Firstly, the classification and preparation methods of core …

A new sensitivity-enhanced refractive index (RI) sensor based on photonic crystal fiber Mach–
Zehnder interferometer (PCF-MZI) was proposed and experimentally demonstrated. It was …