Optical measurement of mechanical parameters is gaining significant commercial interest in
different industry sectors. Torsion, twist and rotation are among the very frequently measured …

Fiber Bragg gratings (FBGs) are inherently sensitive to temperature, axial strain, and
pressure, which can be easily measured by a shift of the Bragg wavelength in their …

A novel temperature-and strain-independent optical fiber torsion sensor based on a phase-
shifted fiber Bragg grating (PSFBG) inscribed by the line-by-line (LbL) technique in a …

A novel long-period fiber grating (LPFG), fabricated by periodically cascading a series of
screw-type distortions, is proposed and experimentally demonstrated. These screw-type …

A compact temperature-insensitive optical fiber twist sensor based on multi-phase-shifted
helical long period fiber grating has been proposed and experimentally demonstrated in this …

In this paper, a new technique exploiting the polarization properties of normal fiber Bragg
grating (FBG) for twist sensing is firstly proposed and experimentally demonstrated. The …

An all-fiber twist sensor based on multimode interferometer (MMI) has been proposed and
fabricated by splicing both ends of a section of square no-core fiber (NCF) with a single …

Interferometer based on multiple beam interferences inside a hollow core fiber (HCF)
structure (also known as an antiresonant reflecting optical waveguide) has been attracting …