CEP-stable, sub-6 fs, 300-kHz OPCPA system with more than 15 W of average power

Prinz, Stephan; Haefner, Matthias; Teisset, Catherine Y.; Bessing, Robert; Michel, Knut; Lee, Yeon; Geng, Xiao; Kim, Seung-Chul; Kim, Dong Eon; Metzger, Thomas; Schultze, Marcel

doi:10.1364/oe.23.001388

Cited by 50 publications

(28 citation statements)

References 20 publications

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“…We believe that passively modelocked diode-pumped Yb-doped TDLs using SESAMs [11] for starting and stabilizing soliton modelocking [12] will ultimately provide the best CEO and timing jitter noise performance. Overview of peak power and repetition rate of some representative laser systems, including Ti:Sapphire (Ti:Sa) amplifiers [13,14] and oscillators [15], fiber amplifiers [16], OPCPA systems [17,18], as well as parameters typically reached inside enhancement cavities [6,19]. The ideal laser parameters zone for megahertz high-harmonic generation (HHG), e.g.…”

Section: Introductionmentioning

confidence: 99%

Frequency comb offset dynamics of SESAM modelocked thin disk lasers

et al. 2015

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Abstract:We present a detailed study of the carrier-envelope offset (CEO) frequency dynamics of SESAM modelocked thin disk lasers (TDLs) pumped by kW-class highly transverse multimode pump diodes with a typical M 2 value of 200-300, and give guidelines for future frequency stabilization of multi-100-W oscillators. We demonstrate CEO frequency detection with > 30 dB signal-to-noise ratio with a resolution bandwidth of 100 kHz from a SESAM modelocked Yb:YAG TDL delivering 140 W average output power with 748-fs pulses at 7-MHz pulse repetition rate. We compare with a low-power CEO frequency stabilized Yb:CALGO TDL delivering 2.1 W with 77-fs pulses at 65 MHz. For both lasers, we perform a complete noise characterization, measure the relevant transfer functions (TFs) and compare them to theoretical models. The measured TFs are used to determine the propagation of the pump noise step-by-step through the system components. From the noise propagation analysis, we identify the relative intensity noise (RIN) of the pump diode as the main contribution to the CEO frequency noise. The resulting noise levels are not excessive and do not prevent CEO frequency stabilization. More importantly, the laser cavity dynamics are shown to play an essential role in the CEO frequency dynamics. The cavity TFs of the two lasers are very different which explains why at this point a tight CEO frequency lock can be obtained with the Yb:CALGO TDL but not with the Yb:YAG TDL. For CEO stabilization laser cavities should exhibit high damping of the relaxation oscillations by nonlinear intra-cavity elements, for example by operating a SESAM in the roll-over regime. Therefore the optimum SESAM operation point is a tradeoff between enough damping and avoiding multiple pulsing instabilities. Additional cavity components could be considered for supplementary damping independent of the SESAM operation point. , 23, issue 17, 21836-21856, 2015 which should be used for any reference to this work 1 Published in Optics Express

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Section: Introductionmentioning

confidence: 99%

Frequency comb offset dynamics of SESAM modelocked thin disk lasers

et al. 2015

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“…A viable alternative to achieve amplification of large bandwidths at high repetition rates is the optical parametric chirped pulse amplification (OPCPA) technology. Recently 6 fs pulses at 300 kHz repetition rates have been demonstrated (Prinz et al, 2015).…”

Section: Few-cycle Carrier Envelope Phase Stabilised Lasersmentioning

confidence: 99%

Attosecond physics at the nanoscale

et al. 2017

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Recently two emerging areas of research, attosecond and nanoscale physics, have started to come together. Attosecond physics deals with phenomena occurring when ultrashort laser pulses, with duration on the femto-and sub-femtosecond time scales, interact with atoms, molecules or solids. The laser-induced electron dynamics occurs natively on a timescale down to a few hundred or even tens of attoseconds (1 attosecond=1 as=10 −18 s), which is comparable with the optical field. For comparison, the revolution of an electron on a 1s orbital of a hydrogen atom is ∼ 152 as. On the other hand, the second branch involves the manipulation and engineering of mesoscopic systems, such as solids, metals and dielectrics, with nanometric precision. Although nano-engineering is a vast and well-established research field on its own, the merger with intense laser physics is relatively recent. In this report on progress we present a comprehensive experimental and theoretical overview of physics that takes place when short and intense laser pulses interact with nanosystems, such as metallic and dielectric nanostructures. In particular we elucidate how the spatially inhomogeneous laser induced fields at a nanometer scale modify the laser-driven electron dynamics. Consequently, this has important impact on pivotal processes such as above-threshold ionization and high-order harmonic generation. The deep understanding of the coupled dynamics between these spatially inhomogeneous fields and matter configures a promising way to new avenues of research and applications. Thanks to the maturity that attosecond physics has reached, together with the tremendous advance in material engineering and manipulation techniques, the age of atto-nano physics has begun, but it is in the initial stage. We present thus some of the open questions, challenges and prospects for experimental confirmation of theoretical predictions, as well as experiments aimed at characterizing the induced fields and the unique electron dynamics initiated by them with high temporal and spatial resolution.

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“…In addition, noncollinear phase-matching offers a large gain bandwidth capable of supporting the amplification of few-cycle pulses. Therefore, in recent years noncollinear optical parametric amplification has become the technique of choice to amplify few-cycle pulses at high repetition rates (>>10 kHz) [5][6][7][8][9][10][11]. Furthermore, secondary sources based on noncollinear optical parametric amplifiers (NOPAs) have received increased interest, in particular, in strong field physics and attosecond science [6,[10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Numerical study of spatiotemporal distortions in noncollinear optical parametric chirped-pulse amplifiers

Giree¹,

Mero²,

Arisholm³

et al. 2017

Opt. Express

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During amplification in a noncollinear optical parametric amplifier the spatial and temporal coordinates of the amplified field are inherently coupled. These couplings or distortions can limit the peak intensity, among other things. In this work, a numerical study of the spatiotemporal distortions in BBO-based noncollinear optical parametric chirped-pulse amplifiers (NOPCPAs) is presented for a wide range of parameters and for different amplification conditions. It is shown that for Gaussian pump beams, gain saturation introduces strong distortions and high conversion efficiency always comes at the price of strong spatiotemporal couplings which drastically reduce the peak intensity even when pulse fronts of the pump and the signal are matched. However, high conversion efficiencies with minimum spatiotemporal distortions can still be achieved with flat-top pump beam profiles.

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CEP-stable, sub-6 fs, 300-kHz OPCPA system with more than 15 W of average power

Cited by 50 publications

References 20 publications

Frequency comb offset dynamics of SESAM modelocked thin disk lasers

Frequency comb offset dynamics of SESAM modelocked thin disk lasers

Attosecond physics at the nanoscale

Numerical study of spatiotemporal distortions in noncollinear optical parametric chirped-pulse amplifiers

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