The Experts below are selected from a list of 24192 Experts worldwide ranked by ideXlab platform
Oleg Pronin - One of the best experts on this subject based on the ideXlab platform.
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all solid state multipass Spectral Broadening to sub 20 fs
Optics Letters, 2018Co-Authors: Kilian Fritsch, Vladimir Pervak, Markus Poetzlberger, Jonathan Brons, Oleg ProninAbstract:In this work, we present a nonlinear Spectral Broadening and compression scheme based on self-phase modulation in bulk media inside a Herriott-type multipass cell. With this reliable approach, we achieved a Spectral Broadening factor of 22 while maintaining an efficiency of over 60% at an average input power of 100 W, and an excellent output beam quality with M2=1.2. The output pulses were compressed to 18 fs, with the broadest spectrum supporting a Fourier-transform limit of 10 fs. The high efficiency and approximately four-optical-cycle pulse duration mark an important milestone towards the realization of a compact, high power oscillator-based driver for XUV frequency combs and other nonlinear processes.
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fiber free all solid state multipass Spectral Broadening down to 10 fs fourier limit
European Quantum Electronics Conference, 2017Co-Authors: Kilian Fritsch, Vladimir Pervak, Markus Poetzlberger, Jonathan Brons, Ferenc Krausz, Oleg ProninAbstract:Spectral Broadening techniques based on fibers are prone to damage and are sensitive to alignment, especially when high average (>50 W) and high peak powers (>10 MW) are combined. Broadening techniques in bulk material [1, 2] represent an alternative approach. However, until recently these techniques were limited in efficiency, beam quality and bandwidth. A lately demonstrated concept of multipass Spectral Broadening in a waveguide-like geometry [3] showed that high efficiency and excellent beam quality can be reached simultaneously. Here we show further that the bandwidth can be extended down to 10 fs in Fourier transform limit (FTL), while still preserving high efficiencies of 70% and good beam quality (see Fig 1c). Proper dispersion management plays a crucial role in this process. This progress paves a way to all solid state, compact and robust diode pumped laser-oscillators for attosecond pulse and XUV generation with MHz repetition rate.
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efficient high power all buik Spectral Broadening in a quasi waveguide
European Quantum Electronics Conference, 2017Co-Authors: Jonathan Brons, Vladimir Pervak, Kilian Fritsch, Marcus Seidel, Ferenc Krausz, Oleg ProninAbstract:The bandwidth of gain materials for high-power femtosecond lasers, mainly Yb:YAG, is fairly limited, allowing only > 100 fs long pulses to be generated efficiently in oscillators [1] or near ps pulses from amplifiers [2]. Therefore, additional pulse-compression, commonly employing solid or gas-filled fibres, is necessary to permit e.g. compact, MHz XUV sources [3] or brilliant mid-infrared (MIR) sources for spectroscopy applications [4]. The use of bulk materials offers some distinct advantages over fiber-based Spectral Broadening such as insensitivity to coupling or alignment as well as low cost.
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all solid state Spectral Broadening an average and peak power scalable method for compression of ultrashort pulses
Optics Express, 2016Co-Authors: Marcus Seidel, Vladimir Pervak, Jonathan Brons, Gunnar Arisholm, Oleg ProninAbstract:Seidel, Marcus; Arisholm, Gunnar; Brons, Jonathan; Pervak, Vladimir; Pronin, Oleg. All solid-state Spectral Broadening: An average and peak power scalable method for compression of ultrashort pulses. Optics Express 2016 ;Volum 24.(9) s. 9412-9428
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all solid state Spectral Broadening an average and peak power scalable method for compression of ultrashort pulses
Optics Express, 2016Co-Authors: Marcus Seidel, Vladimir Pervak, Jonathan Brons, Gunnar Arisholm, Oleg ProninAbstract:Spectral Broadening in bulk material is a simple, robust and low-cost method to extend the bandwidth of a laser source. Consequently, it enables ultrashort pulse compression. Experiments with a 38 MHz repetition rate, 50 W average power Kerr-lens mode-locked thin-disk oscillator were performed. The initially 1.2 μJ, 250 fs pulses are compressed to 43 fs by means of self-phase modulation in a single 15 mm thick quartz crystal and subsequent chirped-mirror compression. The losses due to spatial nonlinear effects are only about 40 %. A second Broadening stage reduced the Fourier transform limit to 15 fs. It is shown that the intensity noise of the oscillator is preserved independent of the Broadening factor. Simulations manifest the peak power scalability of the concept and show that it is applicable to a wide range of input pulse durations and energies.
Marcus Seidel - One of the best experts on this subject based on the ideXlab platform.
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solid core fiber Spectral Broadening at its limits
IEEE Journal of Selected Topics in Quantum Electronics, 2018Co-Authors: Marcus Seidel, Xiao Xiao, Alexander HartungAbstract:Broadband optical spectra are employed in ultrafast time-resolved studies, seeding of tunable parametric amplifiers, and selectively addressing transitions in absorption spectroscopy. A strong extension of Spectral bandwidth is commonly achieved in nonlinear fiber by means of self-phase modulation. In terms of energy scalability and achievable bandwidth, the method is, however, limited by the damage threshold of the core material. Here, we study Spectral Broadening in four different single-mode normal dispersive photonic crystal fibers length of 8–10 cm. They are pumped by a thin-disk oscillator emitting 250 fs pulses at peak powers close to the critical power of silica. We demonstrate mode-field diameter-dependent Broadening factors from 19 to 51, which are obtained at power Spectral densities from 200 to 5 mW/nm. We explain the results by a relation between peak power and Broadening factor. This will serve as a fiber selection guideline transferable to lasers emitting at wavelengths different from 1030 nm. In addition, we examine to which extend prechirp leads to energy scalability of Spectral Broadening in solid-core fiber. By contrast to previous reports, we point out that the applicability of the technique is strongly limited through the requirement of bell-shaped input pulses and the pulse duration dependent material damage threshold.
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efficient high power all buik Spectral Broadening in a quasi waveguide
European Quantum Electronics Conference, 2017Co-Authors: Jonathan Brons, Vladimir Pervak, Kilian Fritsch, Marcus Seidel, Ferenc Krausz, Oleg ProninAbstract:The bandwidth of gain materials for high-power femtosecond lasers, mainly Yb:YAG, is fairly limited, allowing only > 100 fs long pulses to be generated efficiently in oscillators [1] or near ps pulses from amplifiers [2]. Therefore, additional pulse-compression, commonly employing solid or gas-filled fibres, is necessary to permit e.g. compact, MHz XUV sources [3] or brilliant mid-infrared (MIR) sources for spectroscopy applications [4]. The use of bulk materials offers some distinct advantages over fiber-based Spectral Broadening such as insensitivity to coupling or alignment as well as low cost.
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all solid state Spectral Broadening an average and peak power scalable method for compression of ultrashort pulses
Optics Express, 2016Co-Authors: Marcus Seidel, Vladimir Pervak, Jonathan Brons, Gunnar Arisholm, Oleg ProninAbstract:Seidel, Marcus; Arisholm, Gunnar; Brons, Jonathan; Pervak, Vladimir; Pronin, Oleg. All solid-state Spectral Broadening: An average and peak power scalable method for compression of ultrashort pulses. Optics Express 2016 ;Volum 24.(9) s. 9412-9428
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all solid state Spectral Broadening an average and peak power scalable method for compression of ultrashort pulses
Optics Express, 2016Co-Authors: Marcus Seidel, Vladimir Pervak, Jonathan Brons, Gunnar Arisholm, Oleg ProninAbstract:Spectral Broadening in bulk material is a simple, robust and low-cost method to extend the bandwidth of a laser source. Consequently, it enables ultrashort pulse compression. Experiments with a 38 MHz repetition rate, 50 W average power Kerr-lens mode-locked thin-disk oscillator were performed. The initially 1.2 μJ, 250 fs pulses are compressed to 43 fs by means of self-phase modulation in a single 15 mm thick quartz crystal and subsequent chirped-mirror compression. The losses due to spatial nonlinear effects are only about 40 %. A second Broadening stage reduced the Fourier transform limit to 15 fs. It is shown that the intensity noise of the oscillator is preserved independent of the Broadening factor. Simulations manifest the peak power scalability of the concept and show that it is applicable to a wide range of input pulse durations and energies.
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double stage Spectral Broadening in bulk crystals of 50 w 1 3 μj 250 fs pulses to a fourier transform limit of 15 fs
Nonlinear Optics, 2015Co-Authors: Marcus Seidel, Vladimir Pervak, Jonathan Brons, Oleg Pronin, Alexander Apolonski, Ferenc KrauszAbstract:Spectral Broadening of 1.3-μJ, 250-fs pulses in crystalline quartz is presented. Pulse compression to 43-fs was achieved by mans of Broadening in a single 15-mm crystal. A second stage reduced the transform limit to 15-fs.
Robert G. Harrison - One of the best experts on this subject based on the ideXlab platform.
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Spectral Broadening of continuous wave monochromatic pump radiation caused by stimulated brillouin scattering in optical fiber
Optics Letters, 2004Co-Authors: Valerii I Kovalev, Robert G. HarrisonAbstract:We experimentally show that, when stimulated Brillouin scattering is generated in optical fiber by use of monochromatic cw pump radiation, the transmitted pump radiation exhibits Spectral Broadening that is much narrower than the classical homogeneous gain-narrowed Brillouin bandwidth. The bandwidth is practically independent of the pump strength, fiber characteristics, and the waveguide-induced inhomogeneously broadened bandwidth of the Stokes emission. We show that these properties arise from strong parametric coupling of the Stokes and pump signals in the pump-depletion region.
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waveguide induced inhomogeneous Spectral Broadening of stimulated brillouin scattering in optical fiber
Optics Letters, 2002Co-Authors: Valerii I Kovalev, Robert G. HarrisonAbstract:We provide direct experimental evidence of waveguide-induced inhomogeneous Spectral Broadening of stimulated Brillouin scattering (SBS) in optical fiber. It is shown that the SBS Spectral width and gain depend on the numerical aperture for both single-mode and multimode fibers, the functional dependencies of which are in good agreement with our model description of the phenomenon.
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Observation of inhomogeneous Spectral Broadening of stimulated brillouin scattering in an optical fiber
Physical Review Letters, 2000Co-Authors: Valerii I Kovalev, Robert G. HarrisonAbstract:We report experimental results which show that the stimulated Brillouin scattering (SBS) spectrum in an optical fiber is inhomogeneous, exhibiting Spectral Broadening and hole burning under cw monochromatic laser excitation. This phenomenon arises from the waveguide interaction of the pump and Stokes signals and is a fundamental property of SBS in waveguiding systems due to their ability to confine a fan of radiation wave vector directions.
Vladimir Pervak - One of the best experts on this subject based on the ideXlab platform.
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multipass Spectral Broadening with tens of millijoule pulse energy
European Quantum Electronics Conference, 2019Co-Authors: Martin Kaumanns, Vladimir Pervak, Dmitrii Kormin, Vyacheslav Leshchenko, Alexander Kessel, Yu Chen, Thomas NubbemeyerAbstract:Nonlinear Spectral Broadening is widely used for applications like attosecond pulse generation, XUV sources, supercontinuum generation or ultrafast spectroscopy. In these cases the laser is typically Spectrally broadened and compressed to reach pulse durations much shorter than originally available. For pulse energies in the millijoule regime, Spectral Broadening is routinely implemented using capillary optical fibers [1] with remarkable results in terms of output pulse durations and beam quality. In addition to fiber-based approaches, the application of multipass cells for Spectral Broadening [2] recently attracted increasing interest. These cells are capable of preserving a nearly Gaussian mode in the presence of nonlinear effects without a spatial filter or optical fiber, they are robust to input pointing, have a high throughput of more than 90% and can be used with high average powers and energies. In a multipass cell the nonlinear interaction with either gas [3] or a thin solid [2] provides a small amount of Spectral Broadening within each pass. Based on this concept we recently demonstrated output energies of almost 18 mJ by guiding near infrared pulses with a pulse duration of 1.3 ps and a repetition rate of 5 kHz through an argon filled multipass cell [4]. We obtained a Broadening factor of over 33 and could show compressibility down to 41 fs. The energy was limited by the breakdown intensity of argon and the damage threshold of the used optics.
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all solid state multipass Spectral Broadening to sub 20 fs
Optics Letters, 2018Co-Authors: Kilian Fritsch, Vladimir Pervak, Markus Poetzlberger, Jonathan Brons, Oleg ProninAbstract:In this work, we present a nonlinear Spectral Broadening and compression scheme based on self-phase modulation in bulk media inside a Herriott-type multipass cell. With this reliable approach, we achieved a Spectral Broadening factor of 22 while maintaining an efficiency of over 60% at an average input power of 100 W, and an excellent output beam quality with M2=1.2. The output pulses were compressed to 18 fs, with the broadest spectrum supporting a Fourier-transform limit of 10 fs. The high efficiency and approximately four-optical-cycle pulse duration mark an important milestone towards the realization of a compact, high power oscillator-based driver for XUV frequency combs and other nonlinear processes.
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fiber free all solid state multipass Spectral Broadening down to 10 fs fourier limit
European Quantum Electronics Conference, 2017Co-Authors: Kilian Fritsch, Vladimir Pervak, Markus Poetzlberger, Jonathan Brons, Ferenc Krausz, Oleg ProninAbstract:Spectral Broadening techniques based on fibers are prone to damage and are sensitive to alignment, especially when high average (>50 W) and high peak powers (>10 MW) are combined. Broadening techniques in bulk material [1, 2] represent an alternative approach. However, until recently these techniques were limited in efficiency, beam quality and bandwidth. A lately demonstrated concept of multipass Spectral Broadening in a waveguide-like geometry [3] showed that high efficiency and excellent beam quality can be reached simultaneously. Here we show further that the bandwidth can be extended down to 10 fs in Fourier transform limit (FTL), while still preserving high efficiencies of 70% and good beam quality (see Fig 1c). Proper dispersion management plays a crucial role in this process. This progress paves a way to all solid state, compact and robust diode pumped laser-oscillators for attosecond pulse and XUV generation with MHz repetition rate.
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efficient high power all buik Spectral Broadening in a quasi waveguide
European Quantum Electronics Conference, 2017Co-Authors: Jonathan Brons, Vladimir Pervak, Kilian Fritsch, Marcus Seidel, Ferenc Krausz, Oleg ProninAbstract:The bandwidth of gain materials for high-power femtosecond lasers, mainly Yb:YAG, is fairly limited, allowing only > 100 fs long pulses to be generated efficiently in oscillators [1] or near ps pulses from amplifiers [2]. Therefore, additional pulse-compression, commonly employing solid or gas-filled fibres, is necessary to permit e.g. compact, MHz XUV sources [3] or brilliant mid-infrared (MIR) sources for spectroscopy applications [4]. The use of bulk materials offers some distinct advantages over fiber-based Spectral Broadening such as insensitivity to coupling or alignment as well as low cost.
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all solid state Spectral Broadening an average and peak power scalable method for compression of ultrashort pulses
Optics Express, 2016Co-Authors: Marcus Seidel, Vladimir Pervak, Jonathan Brons, Gunnar Arisholm, Oleg ProninAbstract:Seidel, Marcus; Arisholm, Gunnar; Brons, Jonathan; Pervak, Vladimir; Pronin, Oleg. All solid-state Spectral Broadening: An average and peak power scalable method for compression of ultrashort pulses. Optics Express 2016 ;Volum 24.(9) s. 9412-9428
Jonathan Brons - One of the best experts on this subject based on the ideXlab platform.
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all solid state multipass Spectral Broadening to sub 20 fs
Optics Letters, 2018Co-Authors: Kilian Fritsch, Vladimir Pervak, Markus Poetzlberger, Jonathan Brons, Oleg ProninAbstract:In this work, we present a nonlinear Spectral Broadening and compression scheme based on self-phase modulation in bulk media inside a Herriott-type multipass cell. With this reliable approach, we achieved a Spectral Broadening factor of 22 while maintaining an efficiency of over 60% at an average input power of 100 W, and an excellent output beam quality with M2=1.2. The output pulses were compressed to 18 fs, with the broadest spectrum supporting a Fourier-transform limit of 10 fs. The high efficiency and approximately four-optical-cycle pulse duration mark an important milestone towards the realization of a compact, high power oscillator-based driver for XUV frequency combs and other nonlinear processes.
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fiber free all solid state multipass Spectral Broadening down to 10 fs fourier limit
European Quantum Electronics Conference, 2017Co-Authors: Kilian Fritsch, Vladimir Pervak, Markus Poetzlberger, Jonathan Brons, Ferenc Krausz, Oleg ProninAbstract:Spectral Broadening techniques based on fibers are prone to damage and are sensitive to alignment, especially when high average (>50 W) and high peak powers (>10 MW) are combined. Broadening techniques in bulk material [1, 2] represent an alternative approach. However, until recently these techniques were limited in efficiency, beam quality and bandwidth. A lately demonstrated concept of multipass Spectral Broadening in a waveguide-like geometry [3] showed that high efficiency and excellent beam quality can be reached simultaneously. Here we show further that the bandwidth can be extended down to 10 fs in Fourier transform limit (FTL), while still preserving high efficiencies of 70% and good beam quality (see Fig 1c). Proper dispersion management plays a crucial role in this process. This progress paves a way to all solid state, compact and robust diode pumped laser-oscillators for attosecond pulse and XUV generation with MHz repetition rate.
-
efficient high power all buik Spectral Broadening in a quasi waveguide
European Quantum Electronics Conference, 2017Co-Authors: Jonathan Brons, Vladimir Pervak, Kilian Fritsch, Marcus Seidel, Ferenc Krausz, Oleg ProninAbstract:The bandwidth of gain materials for high-power femtosecond lasers, mainly Yb:YAG, is fairly limited, allowing only > 100 fs long pulses to be generated efficiently in oscillators [1] or near ps pulses from amplifiers [2]. Therefore, additional pulse-compression, commonly employing solid or gas-filled fibres, is necessary to permit e.g. compact, MHz XUV sources [3] or brilliant mid-infrared (MIR) sources for spectroscopy applications [4]. The use of bulk materials offers some distinct advantages over fiber-based Spectral Broadening such as insensitivity to coupling or alignment as well as low cost.
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all solid state Spectral Broadening an average and peak power scalable method for compression of ultrashort pulses
Optics Express, 2016Co-Authors: Marcus Seidel, Vladimir Pervak, Jonathan Brons, Gunnar Arisholm, Oleg ProninAbstract:Seidel, Marcus; Arisholm, Gunnar; Brons, Jonathan; Pervak, Vladimir; Pronin, Oleg. All solid-state Spectral Broadening: An average and peak power scalable method for compression of ultrashort pulses. Optics Express 2016 ;Volum 24.(9) s. 9412-9428
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all solid state Spectral Broadening an average and peak power scalable method for compression of ultrashort pulses
Optics Express, 2016Co-Authors: Marcus Seidel, Vladimir Pervak, Jonathan Brons, Gunnar Arisholm, Oleg ProninAbstract:Spectral Broadening in bulk material is a simple, robust and low-cost method to extend the bandwidth of a laser source. Consequently, it enables ultrashort pulse compression. Experiments with a 38 MHz repetition rate, 50 W average power Kerr-lens mode-locked thin-disk oscillator were performed. The initially 1.2 μJ, 250 fs pulses are compressed to 43 fs by means of self-phase modulation in a single 15 mm thick quartz crystal and subsequent chirped-mirror compression. The losses due to spatial nonlinear effects are only about 40 %. A second Broadening stage reduced the Fourier transform limit to 15 fs. It is shown that the intensity noise of the oscillator is preserved independent of the Broadening factor. Simulations manifest the peak power scalability of the concept and show that it is applicable to a wide range of input pulse durations and energies.
