A review of optical fibre devices employing nano-structured coatings is presented. Active
and passive coatings, deposited using the Langmuir–Blodgett and electro-static self …

This paper presents a systematic review of long period fiber gratings (LPFGs) written by the
CO 2 laser irradiation technique. First, various fabrication techniques based on CO 2 laser …

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 …

An overlay material was deposited by the Langmuir–Blodgett technique onto a single-mode
optical fiber containing a long-period grating. The long-period grating exhibits characteristic …

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 …

In this paper, we report novel long-period fiber gratings (LPFGs) fabricated by using a new
writing technique that is mainly based on the thermal shock effect of focused high-frequency …

This paper reviews recent progress in the field of optically pumped rare-earth-doped
channel waveguide lasers, with a focus on operation utilizing distributed-feedback …

We demonstrate a simple but effective method of creating an axially symmetric refractive
index change in an optical fiber using the infrared beam from a carbon dioxide laser …

We have developed a wideband tunable optical filter that uses a long-period fiber grating
(LPFG) in which both resonance wavelength and its signal attenuation can be adjusted. We …

Tunable optical filters have applications in wavelength-division multiplexing, optical sensing,
and fiber lasers. Fiber gratings that are tuned by resistive Joule heating of a thin metal film …