Ebrahim Aghayari
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View article: High-power monolithic narrow-linewidth 1.6 mJ/8 ns fiber laser system based on all-glass spun tapered double-clad fiber amplifier
High-power monolithic narrow-linewidth 1.6 mJ/8 ns fiber laser system based on all-glass spun tapered double-clad fiber amplifier Open
High-energy, narrow-linewidth nanosecond pulses are highly demanding for many applications that require high temporal and spatial coherence. However, the amplification of narrow-linewidth pulses is primarily limited by stimulated Brillouin…
View article: Versatile High-Power Monolithic All-Glass Fiber Amplifier for Pulsed Signals with a Wide Range of Repetition Rates
Versatile High-Power Monolithic All-Glass Fiber Amplifier for Pulsed Signals with a Wide Range of Repetition Rates Open
This study presents a compact, high-power monolithic all-glass spun tapered double-clad fiber amplifier for single-stage amplification of narrow linewidth picosecond pulsed signals from a few tens of mW to several hundred Watts of average …
View article: Yb-doped tapered double-clad fibers with polarization maintenance for half-kW power amplifiers
Yb-doped tapered double-clad fibers with polarization maintenance for half-kW power amplifiers Open
Amplifying short pulses directly within a single fiber laser system has proven to be a challenging task, primarily due to thermally induced transverse mode instabilities and detrimental nonlinear effects. Another demanding aspect is preser…
View article: Observation of spatial nonlinear self-cleaning in a few-mode step-index fiber for special distributions of initial excited modes
Observation of spatial nonlinear self-cleaning in a few-mode step-index fiber for special distributions of initial excited modes Open
In this paper, we experimentally demonstrate that a nonlinear Kerr effect in suitable coupling conditions can introduce a spatially self-cleaned output beam for a few-mode step-index fiber. The impact of the distribution of the initial exc…
View article: Nonlinear spatial reshaping of pulsed beam in a step-index few-mode optical fiber
Nonlinear spatial reshaping of pulsed beam in a step-index few-mode optical fiber Open
In this paper we demonstrate the spatial and spectral dynamics of pulse propagation in a step-index few-mode optical fiber, through an experimental and numerical analysis. The Kerr induced spatial self-cleaning is demonstrated by coupling …