Auflistung nach Schlagwort "Laser pulses"

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  • Accurate propagation of ultrashort pulses in nonlinear waveguides using propagation models for the analytic signal 
    Melchert, O.; Morgner, Uwe; Roth, B.; Babushkin, I.; Demircan, A. (Bellingham, WA : SPIE - International Society for Optical Engineering, 2018)
    We present a numerical approach for the accurate simulation of the complex propagation dynamics of ultrashort optical pulses in nonlinear waveguides, especially valid for few-cycle pulses. The propagation models are derived ...
  • Biodegradable microsphere-mediated cell perforation in microfluidic channel using femtosecond laser 
    Ishii, Atsuhiro; Ariyasu, Kazumasa; Mitsuhashi, Tatsuki; Heinemann, Dag; Heisterkamp, Alexander; Terakawa, Mitsuhiro (Bellingham, WA : S P I E - International Society for Optical Engineering, 2016)
    The use of small particles has expanded the capability of ultrashort pulsed laser optoinjection technology toward simultaneous treatment of multiple cells. The microfluidic platform is one of the attractive systems that ...
  • Dispensing pico to nanolitre of a natural hydrogel by laser-assisted bioprinting 
    Gruene, Martin; Unger, Claudia; Koch, Lothar; Deiwick, Andrea; Chichkov, Boris (London : Biomed Central, 2011)
    Background: Laser-assisted bioprinting of multi-cellular replicates in accordance with CAD blueprint may substantially improve our understandings of fundamental aspects of 3 D cell-cell and cell-matrix interactions in ...
  • Effects of cavitation bubble interaction with temporally separated fs-laser pulses 
    Tinne, Nadine; Knoop, Gesche; Kallweit, Nicole; Veith, Sonja; Bleeker, Sebastian; Lubatschowski, Holger; Krüger, Alexander; Ripken, Tammo (Bellingham, WA : SPIE - International Society for Optical Engineering, 2014)
    We present a time-resolved photographic analysis of the pulse-to-pulse interaction. In particular, we studied the influence of the cavitation bubble induced by a fs-pulse on the optical focusing of the consecutive pulse ...
  • Extreme-ultraviolet frequency combs from high-order harmonic generation with few-cycle pulse trains 
    Tudorovskaya, Maria; Lein, Manfred (College Park, MD : American Physical Society, 2017)
    The spectrum of a high-repetition train of laser pulses consists of many equally spaced lines, forming an optical frequency comb which is useful for high-precision spectroscopy. By exposing atoms to a train of strong pulses, ...
  • Innovative laser sources operating around 2 μm 
    Kracht, D.; Sayinc, H.; Yilmaz, S.; Wysmolek, M.; Hausmann, K.; Ottenhues, C.; Wandt, D.; Wienke, A.; Neumann, J. (Amsterdam : Elsevier B.V., 2016)
    We report on a variety of continuous wave and pulsed laser sources based on Thulium- and Holmium-doped materials, emitting in the spectral range around 2 μm. This includes continuous wave Thulium-doped fiber lasers which ...
  • Picosecond laser filamentation in air 
    Schmitt-Sody, Andreas; Kurz, Heiko G.; Bergé, Luc; Skupin, Stefan; Polynkin, Pavel (Bristol : Institute of Physics Publishing, 2016)
    The propagation of intense picosecond laser pulses in air in the presence of strong nonlinear self-action effects and air ionization is investigated experimentally and numerically. The model used for numerical analysis is ...
  • Population density gratings creation and control in resonant medium by half-cycle terahertz pulses 
    Arkhipov, R.M.; Arkhipov, M.V.; Pakhomov, A.V.; Babushkin, I.; Demircan, A.; Morgner, U.; Rosanov, N.N. (Bristol : IOP Publ., 2021)
    Electromagnetically induced gratings (EIG) are created by standing-wave laser field in resonant media. Such gratings can be also created by few-cycle electromagnetic pulses counter-propagating in the medium via coherent ...
  • Prediction of attosecond light pulses in the VUV range in a high-order-harmonic-generation regime 
    Henkel, Jost; Witting, Tobias; Fabris, Davide; Lein, Manfred; Knight, Peter L.; Tisch, John W.G.; Marangos, Jonathan P. (College Park, MD : American Physical Society, 2013)
    Attosecond light pulses within the vacuum ultraviolet (VUV) energy range are predicted by solving the time-dependent Schrödinger equation (TDSE) for a model neon atom in short laser pulses of different field polarization ...
  • Rapidly tunable femtosecond near-UV pulses from a non-collinear optical parametric oscillator 
    Geesmann, Fridolin Jakob; Mevert, Robin; Zuber, David; Morgner, Uwe (Washington, DC : Optica, 2023)
    Broadband tunable femtosecond laser pulses are of great interest in numerous fields, such as spectroscopy or imaging. Here, we report on the generation of rapidly tunable radiation in the near UV by using intracavity ...
  • Semiclassical two-step model for ionization by a strong laser pulse: further developments and applications 
    Shvetsov-Shilovski, N.I. (Berlin ; Heidelberg : Springer, 2021)
    We review the semiclassical two-step model for strong-field ionization. The semiclassical two-step model describes quantum interference and accounts for the ionic potential beyond the semiclassical perturbation theory. We ...
  • Single-cycle pulse compression in dense resonant media 
    Arkhipov, Rostislav; Arkhipov, Mikhail; Demircan, Ayhan; Morgner, Uwe; Babushkin, Ihar; Rosanov, Nikolay (Washington, DC : Optica, 2021)
    We propose here a new approach for compression and frequency up-conversion of short optical pulses in the regime of extreme nonlinear optics in optically dense absorbing media, providing an alternative route to attosecond-scale ...
  • Strong-field double ionization of Ar below the recollision threshold 
    Liu, Yunquan; Tschuch, S.; Rudenko, A.; Dürr, M.; Siegel, M.; Morgner, Uwe; Moshammer, R.; Ullrich, J. (American Physical Society, 2008)
    Nonsequential double ionization of Ar by 45 fs laser pulses (800 nm) at (4-7)×1013W/cm2 was explored in fully differential measurements. Well below the field-modified recollision threshold we enter the multiphoton regime. ...
  • Time-domain high-finesse atom interferometry 
    Hinderthür, H.; Ruschewitz, F.; Lohe, H.-J.; Lechte, S.; Sengstock, K.; Ertmer, Wolfgang (American Physical Society, 1999)
    We report on experiments of multiple-beam atom interferometry in the time domain. Laser-cooled and trapped atoms interact with atomic "multiple beam splitters" realized by time sequences of resonant laser pulses. The output ...
  • Ultrafast lasers in ophthalmology 
    Lubatschowski, Holger (Amsterdam : Elsevier B.V., 2010)
    Ultrafast laser pulses have become a promising tool for microsurgery of the eye. Due to the low energy threshold, side effects are limited to the micrometer range This precision enables the use of ultrashort laser pulses ...