1 kW 1 mJ eight-channel ultrafast fiber laser

Müller, Michael; Kienel, Marco; Klenke, Arno; Gottschall, Thomas; Shestaev, Evgeny; Plötner, Marco; Limpert, Jens; Tünnermann, Andreas

doi:10.1364/ol.41.003439

Cited by 152 publications

(68 citation statements)

References 14 publications

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“…The repetition rate of the 0.7-µJ, ~32-fs output pulses can be reduced from 74 MHz (fundamental repetition rate of the oscillator) by an integer factor of up to 4 without affecting the pulse parameters. In principle, the repetition rate can be further reduced at the same average power by stronger pulse stretching in the CPA [31] and the pulse duration can be further compressed with alternative, pulse-energy-scalable schemes [9][10][11][12][13][14]. For all repetition rates, an integrated phase noise of 60-mrad in-loop and 225-mrad out-of-loop was measured in a bandwidth from 2 mHz to 4 kHz.…”

Section: Discussionmentioning

confidence: 99%

Phase-stable, multi-µJ femtosecond pulses from a repetition-rate tunable Ti:Sa-oscillator-seeded Yb-fiber amplifier

et al. 2016

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400 kHz, which to the best of our knowledge corresponds to the highest phase stability ever demonstrated for highpower, multi-MHz-repetition-rate ultrafast lasers. This system will enable experiments in attosecond physics at unprecedented repetition rates, it offers ideal prerequisites for the generation and field-resolved electro-optical sampling of high-power, broadband infrared pulses, and it is suitable for phase-stable white light generation.

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Section: Discussionmentioning

confidence: 99%

Phase-stable, multi-µJ femtosecond pulses from a repetition-rate tunable Ti:Sa-oscillator-seeded Yb-fiber amplifier

et al. 2016

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“…Therefore, only capillary‐ or Kagome‐based compression schemes will be considered in the following. Both approaches need to ensure stable operation at average powers up to 1kW, which can nowadays be delivered by femtosecond ytterbium based laser architectures . This includes the waveguides itself as well as all the involved components, such as lenses, laser windows and mirrors.…”

Section: Nonlinear Pulse Compression To Few‐cycle Durationsmentioning

confidence: 99%

“…With the exploration of innovative solid‐state laser concepts femtosecond laser with much higher average powers as compared to Ti:Sa amplifiers have become available. Ytterbium‐based Fiber‐, Slab‐ and Thin‐disk lasers can nowadays provide ultrashort pulses with average powers up to ∼1 kW – more than two orders higher than that of typical Ti:Sa lasers . This increase in output power is possible due to the lower quantum defect of Yb (typically <10 %) compared to Ti:Sa (> 30%) and the improved heat dissipation within the laser medium.…”

Section: Introductionmentioning

confidence: 99%

“…The concept of coherent combination of multiple lasers or amplifiers allows for further average power and pulse energy scaling simply by increasing the number of amplifiers . These modern femtosecond lasers have come of age and are described in a greater detail in the following articles . However, due to the limited gain bandwidth of Yb, the pulse duration of these systems are typically limited to ∼ 1 ps for Yb:YAG down to ∼ 100 fs for Yb:glass lasers.…”

Section: Introductionmentioning

confidence: 99%

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High Average Power Near‐Infrared Few‐Cycle Lasers

Rothhardt

Hädrich

Delagnes

et al. 2017

Laser & Photonics Reviews

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Ultra-short laser pulses with only a few optical cycles duration have gained increasing importance during the recent decade and are currently employed in many laboratories worldwide. In addition, modern laser technology nowadays can provide few-cycle pulses at very high average power which advances established studies and opens exciting novel research opportunities. In this paper, the two complementary approaches for providing few-cycle pulses at high average power, namely optical parametric amplification and nonlinear pulse compression, are reviewed and compared. In addition, their limitations and future scaling potential are discussed. Furthermore, selected applications particularly taking advantage of the high average power and high repetition rate are presented.

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“…Although such systems are flexible, they are also complex, and repetition rate scaling is challenging because of the high pump energies required. On the other hand, fiber and thin-disk technology allows repetition rate scaling in the near-infrared, pushing the frontiers of ultrafast lasers to unprecedented average power levels [8,9]. Much research is devoted to using these lasers for the generation of extreme UV light via high-harmonic generation [10,11].…”

mentioning

confidence: 99%

Generation of microjoule pulses in the deep ultraviolet at megahertz repetition rates

Köttig¹,

Tani²,

Biersach³

et al. 2017

Optica

101

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Although ultraviolet (UV) light is important in many areas of science and technology, there are very few if any lasers capable of delivering wavelength-tunable ultrashort UV pulses at MHz repetition rates. Here we report the generation of deep-UV laser pulses at MHz repetition rates and µJ-energies by means of dispersive wave (DW) emission from self-compressed solitons in gas-filled single-ring hollow-core photonic crystal fiber (SR-PCF). Pulses from an ytterbium fiber laser (~300 fs) are first compressed to ~25 fs in a SR-PCF-based nonlinear compression stage, and subsequently used to pump a second SR-PCF stage for broadband DW generation in the deep UV. The UV wavelength is tunable by selecting the gas species and the pressure. At 100 kHz repetition rate, a pulse energy of 1.05 µJ was obtained at 205 nm (average power 0.1 W), and at 1.92 MHz, a pulse energy of 0.54 µJ was obtained at 275 nm (average power 1.03 W).Ultraviolet (UV) laser pulses are in great demand for a wide range of applications, including photolithography [1], spectroscopy [2] and femtosecond pump-probe measurements [3]. Despite this, the range of available sources is limited. Apart from large-scale synchrotrons and free-electron lasers, very few lasers directly emit UV light, examples being excimer and some solid-state lasers (e.g., cerium-based [4]). An alternative approach involves upconversion of visible or near-infrared laser light via the generation of discrete harmonics in χ (2) and χ (3) media [5,6]. Using an optical parametric amplifier as pump laser provides wavelength-tunability in the UV, and with careful design very short pulse durations can be achieved [7]. Although such systems are flexible, they are also complex, and repetition rate scaling is challenging because of the high pump energies required. On the other hand, fiber and thin-disk technology allows repetition rate scaling in the near-infrared, pushing the frontiers of ultrafast lasers to unprecedented average power levels [8,9]. Much research is devoted to using these lasers for the generation of extreme UV light via high-harmonic generation [10,11]. To this end, pulse compression schemes are commonly employed, based for example on spectral broadening in bulk material [12] or gas-filled capillary and hollow-core photonic crystal fibers (HC-PCFs). This has allowed pulse compression from hundreds of fs to the few-cycle regime in set-ups involving two fiber stages [13,14]. In capillary fibers, spectral broadening normally occurs via self-phase modulation (SPM) in the normal dispersion regime, which requires the use of negatively chirped mirrors after the fiber and compresses the pulses in time by compensating for the induced chirp. If instead soliton-effect self-compression in the anomalous dispersion regime is used, there is no need for dispersion compensation. While this is difficult to achieve in large-bore capillary fibers (anomalous dispersion can only be achieved at very low gas pressures), it is straightforward in HC-PCFs, which deliver low loss even for small core di...

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1 kW 1 mJ eight-channel ultrafast fiber laser

Cited by 152 publications

References 14 publications

Phase-stable, multi-µJ femtosecond pulses from a repetition-rate tunable Ti:Sa-oscillator-seeded Yb-fiber amplifier

Phase-stable, multi-µJ femtosecond pulses from a repetition-rate tunable Ti:Sa-oscillator-seeded Yb-fiber amplifier

High Average Power Near‐Infrared Few‐Cycle Lasers

Generation of microjoule pulses in the deep ultraviolet at megahertz repetition rates

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