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

Amongst the most important and frequently used fibre devices, fibre Bragg and long-period
gratings are conventionally fabricated by low-intensity (I< 10 7 W cm− 2) UV quanta with an …

In this paper, we propose a new technique to fabricate long period gratings (LPGs) by
mechanically applying a force to an optical fiber enclosed in a low-cost periodic 3-D printed …

The electric arc technique allows the inscription of long-period gratings (LPGs) virtually in all
types of fibers, including non-photosensitive fibers, the case of non-Ge–doped photonic …

One of the new methods of fiber optics uses cladding modes for controlling propagation of
radiation in optical fibers. This paper reviews the results of studies on the propagation …

In this work, we reviewed the most important achievements of INESC TEC related to the
fabrication of long-period fiber gratings using the electric arc technique. We focused on the …

In this paper, we investigated the evolution of the dispersion curves of long-period fiber
gratings (LPFGs) from room temperature down to 0 K. We considered gratings arc-induced …

The symmetry of cladding modes excited in microbend and arcinduced long-period fiber
gratings is investigated. An optimization technique is developed to determine the fiber …

In this work, we demonstrate for the first time the capability to inscribe long-period gratings
(LPGs) with UV radiation using simple and low cost amplitude masks fabricated with a …

Using high-intensity (up to 500 GW/cm2) 264 nm laser radiation, we fabricated long-period
fiber gratings (LPFGs) in standard telecom and photosensitive fibers and compared the …