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We present an ultrafast tunable non-collinear parametric oscillator which can be switched with >500 nm/ms over a wide spectral range from 650–1070 nm making the system ideally suited for novel ultrafast bio-imaging techniques.
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.
Results illustrating the nonlinear dynamics of ultrashort laser pulse filamentation in gases are presented, with particular emphasis on the filament properties useful for developing attosecond light sources. Two aspects of ultrashort pulse filaments are specifically discussed: (i) numerical simulation results on pulse self-compression by filamentation in a gas cell filled with noble gas. Measurements...
For the generation of intense few-cycle laser pulses with stable carrier envelope phase (CEP), the approach of optical parametric chirped pulse amplification (OPCPA) is well established. In this contribution we present a compact and robust CEP-stable OPCPA system emitting pulses with energy above 10 μJ at 200 kHz repetition rate and pulse durations of 6.3 fs. Additionally, we present the results of...
The successful synthesis of two complementary spectra to a single coherent ultra-broadband spectrum [1] led to the generation of almost single-cycle and sub single-cycle pulses in the visible and the infrared region. The pulse compression of a serial synthesized spectrum (spanning over 400 THz, see Fig. 1 b), [2]) generated in former work suffers from broadband dispersion elements. A 4-f pulse shaper...
Broadband short pulse laser sources are subject of growing interest due to their potential in few-cycle pulse generation, femtosecond spectroscopy and frequency-comb generation. For low pulse energies, octave spanning Ti:sapphire oscillators provide the most required features next to an excellent noise behaviour and are well established [1]. However, higher pulse energies would be desirable for many...
Filamentation of ultra-short laser pulses in gases is an emerging technique for versatile applications reaching from pulse-compression in the few-cycle regime to frequency generation into the THz regime. Moreover, radiation in the short wavelength range is generated by filaments. Especially, the third harmonic (TH) is generated within a filament usually on a cone [1,2]. In this paper, we demonstrate...
We present a non-collinear optical parametric amplifier (NOPA) delivering sub-10-fs pulses with 420 nJ of pulse energy. The system is driven by pulse trains at 1-MHz repetition rate from an amplified Yb:KYW oscillator with cavity-dumping.
A double pass cw-pumped Ti:sapphire amplifier delivering 1.6μJ pulses at 1 MHz is presented. Furthermore a simple analytical model for the amplifier is deduced and concepts for further energy scaling are explored.
An OPCPA system delivering 8.8 fs pulses with 1.3 μJ of energy at 143 kHz repetition rate is presented. Pump and seed for the parametric amplification are simultaneously generated by a broadband Ti:sapphire oscillator.
We present an octave-spanning Ti:sapphire laser quasi-synchronously pumped by a frequency-doubled Yb:KLu(WO4)2 thin-disk oscillator. The system features a self-starting behavior and can be stabilized with respect to its carrier-envelope-offset phase.
We present a Ti:sapphire based pulse train stabilized to carrier-envelope-offset frequency zero using an extended self-referencing technique. The excellent CEP lock is verified by recording the spectral interference of 1011 pulses in a second f-to-2f-interferometer.
We report on the combination of an octave-spanning Ti:sapphire oscillator and a frequency-doubled thin-disk laser used as pump source. Self-starting and self-synchronization of the two lasers has been observed. We demonstrate for the first time the stabilization of the carrier-envelope phase of a Ti:sapphire laser pumped by a mode-locked pump source.
A number of applications ranging from high-resolution frequency-comb spectroscopy, coherent control with shaped femtosecond pulses to novel carrier envelope offset (CEO) sensitive experiments rely on femtosecond laser sources which are stabilized with respect to the CEO-phase and repetition rate. This paper investigates on an octave-spanning Ti:sapphire laser system that reveals its CEO-phase without...
In this paper, we report for the first time to our knowledge on a chirped-pulse Ti:sapphire laser oscillator with acousto-optical cavity-dumping that reaches pulse energies in excess of 1 muJ at a repetition rate of 1 MHz and with a spectral width supporting pulse durations below 80 fs. After the laser, a CW-pumped, cryogenically cooled amplifier is used to further increase the pulse energy up to...
Sub-10-fs-pulses are generated by self-compression in a noble gas filament. Using input pulses from a Ti:sapphire amplifier system with an energy of about 1.5 mJ at a repetition rate of 3 kHz and a pulse duration of 30 fs self-compressed sub-10-fs pulses with energies of about 0.3 mJ have been generated. These pulses are characterized with spectral phase interferometry for direct electrical-field...
A waveform synthesizer consisting of an octave-spanning Ti:sapphire oscillator and a prism-based pulse shaper is presented. Combined with CEO-phase stabilization the system allows for full control of the electric field on a sub-femtosecond time-scale.
A waveform synthesizer consisting of an octave-spanning Ti:sapphire oscillator and a prism-based pulse shaper is presented. Combined with CEO-phase stabilization the system allows for full control of the electric field on a sub-femtosecond time-scale.
We present a unique combination of an improved octave-spanning laser oscillator and prism-based pulse shaper allowing for the generation of various pulse shapes and sequences for coherent control experiments.
We demonstrate pulse shaping and temporal superresolution for few-cycle pulses. A reduction of the FWHM pulse width down to 3.7 fs has been achieved well below the transform limit of 4.5 fs.
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