Fiber Bragg grating (FBG) is the most widely used optical fiber sensor due to its compact
size, high sensitivity, and easiness for multiplexing. Conventional FBGs fabricated by using …

In the petroleum industry, advances in technology are required for cost-effective production
in key reservoir exploration areas and oil-well production management to increase yield and …

This paper presents the development of a three-dimensional (3-D) displacement sensor
based on one fiber Bragg grating (FBG). In order to obtain higher sensitivity and dynamic …

We demonstrated a two-dimensional vector-bending sensor by use of fiber Bragg gratings
(FBGs) inscribed in a homogeneous seven-core fiber. Seven FBGs were simultaneously …

The paper presents selective fiber Bragg grating (FBG) inscription in four-core fiber based
on a phase mask scanning method. The inscription factors are systematically investigated …

A high curvature flexible Bragg grating, in planar technology, is designed, fabricated and
experimentally characterized by employing silica glass. The curvature sensing mechanism …

In the present work, we introduced a highly sensitive vibration sensor, which is based on the
dispersion turning point (DTP) microfiber Mach-Zehnder interferometer. The axial strain and …

Sensors based on Bragg gratings inscribed in conventional single mode fibers are
expensive due to the need of a sophisticated, but low-speed, interrogation system. As an …

We demonstrate a fiber-optic strain sensor based on a seven-core fiber (7-CF) for accurate
extrusion bending and tensile strain sensing. The sensor structure we designed is the 7-CF …

We investigated and prepared a chirped long-period grating for high sensitivity bending
measurement. The novel fiber structure is composed of the multimode fiber (MMF) with fixed …