This paper reviews recent work on the design, experimental implementation, and application
of two fundamental all-optical analog signal processing functionalities, namely, photonic …

Metastructures hold the potential to bring a new twist to the field of spatial-domain optical
analog computing: migrating from free-space and bulky systems into conceptually …

We present wave-based signal differentiation with unprecedented fidelity and flexibility by
purposefully perturbing overmoded random scattering systems such that zeros of their …

As a new degree of freedom for optical manipulation, recently, spatiotemporal optical
vortices (STOVs) carrying transverse orbital angular momentums have been experimentally …

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 …

We report the experimental realization of an ultrafast all-optical temporal differentiator.
Differentiation is obtained via all-fiber filtering based on a simple diffraction grating-assisted …

We propose and experimentally demonstrate an all-optical (all-fiber) temporal differentiator
based on a simple π-phase-shifted fiber Bragg grating operated in reflection. The proposed …

We report the first experimental realization of an all-optical temporal integrator. The
integrator is implemented using an all-fiber active (gain-assisted) filter based on …

We investigate experimentally and analytically the coalescence of reflectionless (RL) states
in symmetric complex wave-scattering systems. We observe RL exceptional points (EPs) …