Browsing Articles by Author "Arisholm, Gunnar"

Now showing items 1-18 of 18

    • All solid-state spectral broadening: An average and peak power scalable method for compression of ultrashort pulses 

      Seidel, Marcus; Arisholm, Gunnar; Brons, Jonathan; Pervak, Vladimir; Pronin, Oleg (2016)
      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 ...

    • CEP-stable few-cycle pulses with more than 190 μJ of energy at 100 kHz from a noncollinear optical parametric amplifier 

      Furch, Federico J.; Witting, Tobias; Giree, Achut; Luan, Chao; Schell, Felix; Arisholm, Gunnar; Schulz, Claus P.; Vrakking, Marc J. J. (2017)
      Noncollinear optical parametric amplifiers (NOPAs) have become the leading technique for the amplification of carrier-envelope phase (CEP)-stable, few-cycle pulses at high repetition rate and high average power. In this ...

    • Chirped pulses sum frequency generation for deep-UV picosecond pulse shaping 

      Vicario, Carlo; Trisorio, Alexandre; Arisholm, Gunnar; Hauri, Christoph P. (2012)
      We show by experiments and simulations that properly chirped laser pulses enable efficient and broadband sum frequency generation in nonlinear crystals. We achieved high energy, picosecond deep-UV pulses with spectral ...

    • Combined range ambiguity resolution and noise reduction in lidar signal processing 

      Arisholm, Gunnar; Skauli, Torbjørn; Landrø, Stig Endre (2018)
      When the interval between transmitted pulses is shorter than the time of flight, it is not straightforward for a lidar to determine the distance uniquely. We present a method that uses varying pulse intervals, constructs ...

    • Deep-ultraviolet picosecond flat-top pulses by chirp-matched sum frequency generation 

      Vicario, Carlo; Trisorio, Alexandre; Arisholm, Gunnar; Hauri, Christoph P. (2012)
      Picosecond, flat-top, deep-UV pulses are needed to generate high-brightness electron beams to efficiently drive x-ray free electron lasers. Current metal photocathodes have low efficiency and therefore require high-energy ...

    • Efficient High-Power Ultrashort Pulse Compression in Self-Defocusing Bulk Media 

      Seidel, Marcus; Brons, Jonathan; Arisholm, Gunnar; Fritsch, Kilian; Pervak, Vladimir; Pronin, Oleg (2017)
      Peak and average power scalability is the key feature of advancing femtosecond laser technology. Today, near-infrared light sources are capable of providing hundreds of Watts of average power. These sources, however, ...

    • Few-cycle pulse generation by double-stage hybrid multi-pass multi-plate nonlinear pulse compression 

      Viotti, Anne-Lise; Li, Chen; Arisholm, Gunnar; Winkelmann, Lutz; Hartl, Ingmar; Heyl, Christoph M.; Seidel, Marcus (2023-02-10)
      Few-cycle pulses present an essential tool to track ultrafast dynamics in matter and drive strong field effects. To address photon-hungry applications, high average power lasers are used which, however, cannot directly ...

    • Generation of 1.5-octave intense infrared pulses by nonlinear interactions in DAST crystal 

      Vicario, Carlo; Monoszlai, B.; Arisholm, Gunnar; Hauri, CP (2015)
      Infrared pulses with large spectral width extending from 1.2 to 3.4 μm are generated in the organic crystal DAST (4-N, N-dimethylamino-4'-N'-methylstilbazolium tosylate). The input pulse has a central wavelength of 1.5 μm ...

    • High-energy bow tie multi-pass cells for nonlinear spectralbroadening applications 

      Heyl, Christoph M.; Seidel, Marcus; Escoto, Esmerando; Schönberg, Arthur; Carlström, Stefanos; Arisholm, Gunnar; Lang, Tino; Hartl, Ingmar (2022-01-24)
      Multi-pass cells (MPCs) have emerged as very attractive tools for spectral broadening and post-compression applications. We discuss pulse energy limitations of standard MPCs considering basic geometrical scaling principles ...

    • High-power, 1-ps, all-Yb:YAG thin-disk regenerative amplifier 

      FATTAHI, Hanieh; Alismai, Ayman; Wang, Haochuan; Brons, Jonathan; Pronin, Oleg; Buberl, Theresa; Vamos, Lenard; Arisholm, Gunnar; Azzeer, Abdallah M; Krausz, Ferenc (2016)
      We report a 100 W, 20 mJ, 1-ps, all-Yb:YAG thin-disk regenerative amplifier seeded by a microjoule-level Yb:YAG thin-disk Kerr-lens mode-locked oscillator. The regenerative amplifier is implemented in a chirped pulse ...

    • Multi-gigawatt peak power post-compression in a bulk multi-pass cell at a high repetition rate 

      Raab, Ann-Kathrin; Seidel, Marcus; Guo, Chen; Sytcevich, Ivan; Arisholm, Gunnar; L’Huillier, Anne; Arnold, Cord L.; Viotti, Anne-Lise (2022-09-27)
      The output of a 200 kHz, 34 W, 300 fs ytterbium amplifier is compressed to 31 fs with >88% efficiency to reach a peak power of 2.5 GW, which to date is a record for a singlestage bulk multi-pass cell. Despite operation ...

    • Multi-watt, multi-octave, mid-infrared femtosecond source 

      Seidel, Marcus; Xiao, Xiao; Hussain, Syed A.; Arisholm, Gunnar; Hartung, Alexander; Zawilski, Kevin T.; Schunemann, Peter; Habel, Florian; Trubetskov, Michael; Pervak, Vladimir; Pronin, Oleg; Krausz, Ferenc (2018)
      Spectroscopy in the wavelength range from 2 to 11 μm (900 to 5000 cm−1) implies a multitude of applications in fundamental physics, chemistry, as well as environmental and life sciences. The related vibrational transitions, ...

    • Near-PHz-bandwidth, phase-stable continua generated from a Yb:YAG thin-disk amplifier 

      Fattahi, Hanieh; Wang, Haochuan; Alismail, Ayman; Arisholm, Gunnar; Pervak, Vladimir; Azzeer, Abdallah M.; Krausz, Ferenc (2016)
      We report on the generation of a multi-octave, phase-stable continuum from the output of a Yb:YAG regenerative amplifier delivering 1-ps pulses with randomly varying carrier-envelope phase (CEP). The intrinsically CEP-stable ...

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

      Giree, Achut; Mero, Mark; Arisholm, Gunnar; Vrakking, Marc J. J.; Furch, Federico J. (2017)
      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 ...

    • Optical parametric master oscillator and power amplifier for efficient conversion of high-energy pulses with high beam quality 

      Arisholm, Gunnar; Nordseth, Ørnulf; Rustad, Gunnar (2004)
      We describe a system for parametric conversion of high-energy, Q-switched laser pulses from 1.064 µm to 2.1 µm in KTiOPO4. High beam quality and efficiency are obtained by use of a two-stage system: An optical parametric ...

    • Optical parametric oscillators with high pulse energy and beam quality 

      Rustad, Gunnar; Farsund, Øystein; Arisholm, Gunnar (2010)
      A new method for obtaining high beam quality from high pulse energy optical parametric oscillators (OPOs) is demonstrated. By using different nonlinear crystals that have walk-off in orthogonal directions but are type 2 ...

    • Third-generation femtosecond technology 

      FATTAHI, Hanieh; BARROS, HELENA G.; GORJAN, MARTIN; NUBBEMEYER, THOMAS; ALSAIF, BIDOOR; TEISSET, CATHERINE Y.; SCHULTZE, MARCEL; PRINZ, STEPHAN; HAEFNER, MATTHIAS; UEFFING, MORITZ; ALISMAIL, AYMAN; VÁMOS, LÉNÁRD; SCHWARZ, ALEXANDER; PRONIN, OLEG; BRONS, JONATHAN; GENG, XIAO TAO; Arisholm, Gunnar; CIAPPINA, MARCELO; YAKOVLEV, VLADISLAV S.; KIM, DONG-EON; AZZEER, ABDALLAH M.; KARPOWICZ, NICHOLAS; SUTTER, DIRK; Major, Zsuzsanna; Metzger, Thomas; Krausz, Ferenc (2014)
      Femtosecond pulse generation was pioneered four decades ago using mode-locked dye lasers, which dominated the field for the following 20 years. Dye lasers were then replaced with titanium-doped sapphire (Ti:Sa) lasers, ...

    • Ultrafast Pulse Compression in Bulk with > 20 Times Spectral Broadening Factor from a Single Stage 

      Seidel, Marcus; Balla, Prannay; Arisholm, Gunnar; Winkelmann, Lutz; Hartl, Ingmar; Heyl, Christoph M. (2021-11-01)
      We introduce the combination of multi-pass cell and multi-plate spectral broadening. We demonstrate the compression of 110-μJ pulses from 900-fs to 60-fs in a single stage and report broadening to 38-fs transform-limit by ...