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 work, we review the most important achievements of INESC TEC related to the
properties and applications of arc-induced long-period fiber gratings. The polarization …

We present a theoretical analysis of light propagation in a four-layer planar waveguide that
consists of a long-period grating (LPG) having a period of the order of 100 µm. By means of …

After a brief presentation of many possible solutions usable to control or compensate the
chromatic dispersion of optical links, we report the simulation, realization, and …

Long-period-grating filters were fabricated in polymer-clad ion-exchanged BK7 glass
waveguides. The transmission spectra of the filters exhibited strong polarization …

Electric arc-induced long-period fiber gratings, with low insertion loss (< 0.2 dB) and high
isolation peaks (− 24 dB), have been fabricated in standard single-mode fiber (Corning …

A simple and effective method is proposed to improve spectral sensitivity and detection limit
of long period gratings for refractive index or chemical sensing, where the grating surface is …

This letter presents the fabrication and demonstration of a long-period raised rib waveguide
grating using nano-imprint lithography. The device consists of a lower UV15 cladding, where …

We analyze the transmission response of symmetric multiple phase-shifted long-period fiber
gratings (LPGs). In particular, we present the optimal design parameters for two and three …

The development of optical fiber gratings (OFGs) had made significant advances both in
terms of research and development of optical communications and sensors. OFGs are …