Optical Parametric Amplification Techniques for the Generation of High-Energy Few-Optical-Cycles IR Pulses for Strong Field Applications

Ciriolo, Anna G.; Negro, Matteo; Devetta, M.; Cinquanta, Eugenio; Faccialá, Davide; Pusala, Aditya; Silvestri, S. De; Stagira, S.; Vozzi, C.

doi:10.3390/app7030265

Cited by 52 publications

(30 citation statements)

References 110 publications

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“…The stored electric energy density and the polarization density must be simultaneously high for a significant stimulus wave amplification. The stored electric energy density indicates the achievable order of stimulus wave amplification [14,15], and the polarization density acts as a coupling coefficient, which is a measure of how much stored electric energy can be coupled to the stimulus wave.…”

Section: Optimization Algorithm (Bfgs)mentioning

confidence: 99%

“…The stored electric energy density indicates the achievable order of stimulus wave amplification [14,15], and the polarization density acts as a coupling coefficient, which is a measure of how much stored electric energy can be coupled to the stimulus wave. The time variation of the spectrally broadened (polychromatic) stimulus wave between t = 6.6 picoseconds and t = 10 picoseconds is shown in Figure 6.…”

Section: Appl Sci 2020 10 X For Peer Review 14 Of 24mentioning

confidence: 99%

“…Resonance f requency o f the interaction medium : f 0 = 3 × 10 14 Hz Damping coe f f icient o f the interaction medium : γ = 1 × 10 11 Hz Dielectric constant o f the interaction medium (ε ∞ ) = 1 + χ = 10 (µ r = 1) Spatial range o f the interaction medium : 4µm < x < 9µm Le f t per f ectly matched layer (le f t absorption layer) is f rom x = 0 to x = 2.25µm Right per f ectly matched layer (right absorption layer) is f rom x = 10.75µm to x = 13µm Our goal is to amplify the input wave via energy coupling from the high-power pump wave. The computational results are obtained by solving (21a,b) and by computing the ratio of the spectral intensity of the input wave for ω = ω 1 at t = t max to the input wave intensity for ω = ω 1 at t = 0:…”

Section: Range Of Independent Simulation Variablesmentioning

confidence: 99%

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Super-Gain Optical Parametric Amplification in Dielectric Micro-Resonators via BFGS Algorithm-Based Non-Linear Programming

Aşırım

Kuzuoğlu

2020

Applied Sciences

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The goal of this paper is to show that super-gain optical parametric amplification can be achieved even in a small micro-resonator using high-intensity ultrashort pump waves, provided that the frequencies of the ultrashort pulses are tuned to maximize the intracavity magnitude of the wave to be amplified, which we call the stimulus wave. In order to accomplish this, we have performed a dispersion analysis via computational modeling of the electric polarization density in terms of the non-linear electron cloud motion and we have concurrently solved the electric polarization density and the wave equation for the electric field. Based on a series of non-linear programming-integrated finite difference time-domain simulations, we have identified the optimal pump wave frequencies that simultaneously maximize the stored electric energy density and the polarization density inside a micro-resonator by using the Broyden–Fletcher–Goldfarb–Shanno (BFGS) optimization algorithm. When the intracavity energy and the polarization density (which acts as an energy coupling coefficient) are simultaneously high, an input wave can be strongly amplified by efficiently drawing energy from a highly energized cavity. Therefore, we propose that micrometer-scale achievement of super-gain optical parametric amplification is possible in a micro-resonator via high-intensity ultrashort “pump wave” pulses, by determining the optimal frequencies that concurrently maximize the stored electric energy density and the polarization density in a dielectric interaction medium.

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Section: Optimization Algorithm (Bfgs)mentioning

confidence: 99%

Section: Appl Sci 2020 10 X For Peer Review 14 Of 24mentioning

confidence: 99%

Section: Range Of Independent Simulation Variablesmentioning

confidence: 99%

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Super-Gain Optical Parametric Amplification in Dielectric Micro-Resonators via BFGS Algorithm-Based Non-Linear Programming

Aşırım

Kuzuoğlu

2020

Applied Sciences

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“…Using the chirped pulse amplification (CPA) technique, ultrashort‐pulse laser sources with durations on the femtosecond time scale can produce multi‐terawatt and even petawatt power . These laser pulses can be focused to intensities well above 10 18 W/cm 2 , from which an electron will acquire a quiver velocity approaching the speed of light; that is, the electron motion in the laser fields becomes highly relativistic and non‐linear.…”

Section: Introductionmentioning

confidence: 99%

“…The best situation is the Fourier transform‐limited (FTL) femtosecond laser pulse, or in other words, circumvention of any chirps that would stretch or distort the femtosecond laser pulse via novel techniques such as an acousto‐optic programmable dispersive filter or adaptive‐feedback spectral‐phase control . At present, a sub‐10 fs laser pulse with multi‐terawatt to even petawatt power can be routinely designed based on optical parametric chirped pulse amplification (OPCPA) . Thus, relativistic laser intensity can still be sustained when stretching such sub‐10 fs laser pulses to the 20–30 fs range or even longer by deliberately introducing some chirps.…”

Section: Introductionmentioning

confidence: 99%

Simulation of a chirped femtosecond relativistic laser pulse interaction with underdense plasma by using a hydrodynamic approach

Zhu

et al. 2019

Contributions to Plasma Physics

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A chirped laser pulse indicates that the laser frequency changes over the duration of the pulse: a positively (negatively) chirped pulse implies that the laser frequency increases (decreases) with time. In this paper, we use a simplified, fully relativistic hydrodynamic approach to simulate the influence of chirp on the propagation of a femtosecond relativistic laser pulse in underdense plasma. Based on this simplified cold-fluid model, the influence of chirp on the main dynamics of the laser pulse, such as self-steepening, red-shift in the leading edge, variation of the frequency chirp, and the generated wakefields can be studied self-consistently. The simulation results show that a pulse with a positive chirp results in a larger increment in the intensity parameter a 0 when propagating a certain distance into an underdense plasma compared with an un-chirped and a negatively chirped pulse, which is largely because of a much greater forward shift of the peak amplitude and more severe pulse self-steepening effect due to the frequency red-shift at the leading edge when exciting a plasma wave. The ponderomotive force, which relates to the first-order differential of the laser pulse intensity envelope, is expected to be stronger for a positively chirped pulse because of its steeper leading edge and larger intensity parameter a 0 .As a result, the wakefield driven by the positively chirped laser pulse is more intense than that driven by an un-chirped and a negatively chirped laser pulse, which is confirmed by our self-consistent hydrodynamic simulation. K E Y W O R D Schirp, femtosecond relativistic laser, plasma, wakefield INTRODUCTIONUsing the chirped pulse amplification (CPA) technique, ultrashort-pulse laser sources with durations on the femtosecond time scale can produce multi-terawatt and even petawatt power. [1][2][3] These laser pulses can be focused to intensities well above 10 18 W/cm 2 , [4] from which an electron will acquire a quiver velocity approaching the speed of light; that is, the electron motion in the laser fields becomes highly relativistic and non-linear. Thus, these laser pulses are called relativistic femtosecond laser pulses and have great applications in high energy density science, such as energetic electron acceleration, [5] ion acceleration, [6] attosecond pulses generation, [7,8] positron beams for laboratory astrophysics, [9] and so on. These applications require long laser

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Dispersion‐Engineered Super‐Gain Parametric Amplification in Nanoscale Optical Cavities

Aşırım

2024

Advanced Photonics Research

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The gain factor of the optical parametric amplification (OPA) process is known to be negligible in the small scale due to low‐interaction‐medium length. Hence, in the nanoscale, OPA is deemed as infeasible. Therefore, in small‐scale‐integrated optical devices, stimulated‐emission‐based amplifiers (lasers) are employed instead of OPAs. In contrast, the major advantage of OPAs over lasers is that unlike lasers which only provide amplification over a narrow spectral band, OPAs provide high‐gain amplification over a very large, user‐controlled spectral band. In this article, it is shown that OPA can yield wideband high‐gain amplification over a nanoscale beam propagation distance through dispersion engineering. This is achieved by a proper tuning of the pump (source) wave frequency, which can maximize the effective medium nonlinearity by a few orders of magnitude, while concurrently maximizing the intracavity energy density, thereby compensating for the small co‐propagation distance for the input (signal) and pump beams. In this study, it is shown that an input wave can be amplified by a factor in a nanoscale cavity via precise dispersion engineering. Both empirical and computational formulations are used for the investigation, which display a reasonable agreement.

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Optical Parametric Amplification Techniques for the Generation of High-Energy Few-Optical-Cycles IR Pulses for Strong Field Applications

Cited by 52 publications

References 110 publications

Super-Gain Optical Parametric Amplification in Dielectric Micro-Resonators via BFGS Algorithm-Based Non-Linear Programming

Super-Gain Optical Parametric Amplification in Dielectric Micro-Resonators via BFGS Algorithm-Based Non-Linear Programming

Simulation of a chirped femtosecond relativistic laser pulse interaction with underdense plasma by using a hydrodynamic approach

Dispersion‐Engineered Super‐Gain Parametric Amplification in Nanoscale Optical Cavities

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