It is demonstrated that a single, uniform long-period fiber grating (LPFG) working in the
linear regime inherently behaves as an ultrafast optical temporal differentiator. Specifically …

We propose a novel linear filtering scheme based on ultrafast all-optical differentiation for re-
shaping of ultrashort pulses generated from a mode-locked laser into flat-top pulses. The …

The filtering scheme proposed here is based on transmission through a dual long-period-
fiber-grating (LPFG) configuration and enables implementation of arbitrary spectral transfer …

Prospects of creating analog computers, in which light characteristics are used as variables,
are considered. Current approaches to the implementation of primitive operations (addition …

В статье рассматривается возможность создания аналоговых вычислительных машин,
в которых переменной величиной является характеристика светового потока …

Reshaping of an ultrashort Gaussian-like pulse into a flat-top pulse is demonstrated using
an integrated Mach-Zehnder interferometer (MZI). The 7.8-ps Gaussian-like pulses are …

The femtosecond pulse-shaping capabilities of wavelength-selective directional couplers
are investigated. Numerical results show that, depending on the coupling length and …

We review recent work on all‐fiber (long‐period fiber grating) devices for optical pulse
shaping, particularly flat‐top pulse generation, down to the subpicosecond range and their …

A picosecond flat-top pulse shaper using an abrupt taper interferometer is proposed and
experimentally demonstrated. A theoretical model based on coupled mode equations is also …

The generation of self-similar super Gaussian-like pulses from a passively mode-locked
fiber laser is numerically demonstrated. The laser cavity utilizes a long period fiber grating …