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We generate 260 μJ energy optical pulses at 7 μm with an OPCPA pumped by an optically synchronized 2 μm picosecond CPA system. The mid-IR pulses exhibit a bandwidth supporting sub-4 optical cycle duration.
A hybrid Ti:Sa CPA/BBO OPCPA system with a XPW filter inbetween the two has been developed to produce a broadband high contrast seeder of 10 mJ for the two 10 PetaWatt beamlines of ELI NP infrastructure.
We review the recent results achieved on industrial grade Titanium Sapphire PetaWatt lasers demonstrating clear improvements. Key enabling technologies are presented. Perspectives towards higher peak power of 10 PW are discussed.
Ultra high intensity laser pulses are required by researchers for a growing number of applications such as laser-based particle acceleration for generation of ultrafast energetic electrons [1], laser based ion acceleration and attosecond light pulse generation.
We describe design and performance of a PetaWatt laser based on Titanium Sapphire and working at an unprecedented repetition rate of 1 Hz. Preliminary results indicate an energy of 22 J before the final amplifier.
We report parametric generation of near- and mid-infrared picosecond pulses at 100 kHz in CdSiP2 pumped at 1.064 µm, providing 154 mW of idler at 6.204 µm and 1.16 W of signal at 1.282 µm.
We report parametric generation of near- and mid-infrared picosecond pulses at 100 kHz in CdSiP2 pumped at 1.064 μm, providing 154 mW of idler at 6.204 μm and 1.16 W of signal at 1.282 μm.
The authors have devised a completely new source of ultrashort laser pulses (9 cycles) in the mid-IR (3.2 mum) with a repetition rate of 100 kHz. This novel design is compact, solid-state, solely based on OPCPA, and incorporates a fibre seeder as well as solid-state pump laser, thereby ensuring maximum reliability and hands-off operation. The pulse energy, measured after compression, is 1.2 muJ and...
The generation of few-cycle, carrier envelop phase (CEP) stable pulses in the mid-IR is of great interest for many applications, ranging from medical and industrial applications to spectroscopy and strong field physics. Mid-IR lasers can produce shorter attosecond pulses and allow improved discrimination between tunnelling and multi-photon processes. In this work, The authors simulate the generation...
In this paper, we report for the first time efficient optical parametric amplification (OPA) of ultrashort intense laser pulses in a gas-filled capillary in the near infrared (NIR). By properly exciting the modes of the capillary and by further optimization of the gas pressure we show broadband phase-matched OPA with a gain exceeding 30 dB at the input seed wavelength of 400 nm and generation of high...
We demonstrate improved accuracy and consistency for spectral-shearing interferometry using multiple shears. Using a new algorithm, different spectral shears are combined to perform accurate spectral phase measurements of complicated pulses from a hollow-core fiber system.
We present a design for a novel carrier to envelope phase stable OPCPA source in the mid-infrared. The obtained results indicate pulses of 56 fs duration, with pulse energies of 9.6 muJ at a central wavelength of 3.3 mum.
We demonstrate efficient parametric generation of > 4 muJ, 80 fs pulses centered at 1.3 mum in a gas-filled hollow fibre. The measured bandwidth supports few cycle, passively CEP-locked infrared pulses for EUV and attosecond physics.
A novel mid-IR OPCPA source generates 9.0 cycle pulses (96 fs at 3.2 mum) with 1.2 muJ energy at 100 kHz, and is expected to be intrinsically CEP stable. The minimum Fourier transform limited pulse duration is 45 fs, or 4.2 cycles.
Summary form only given. The propagation of intense laser pulses in the atmosphere is relevant to a wide range of applications: Lidar, lightening protection, wave guides in air, directed energy. Due to the nonlinear part of air refraction index, high power laser pulses can self-focus during their propagation through the atmosphere. Beyond critical power, self-focusing overcomes diffraction and the...
We present two simplified models for the propagation of a long pulse UV filament in air, predicting the evolution of the beam diameter with distance, and the beam profile.
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