Auflistung nach Schlagwort "Laser damage"

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  • Approaches toward optimized laser-induced damage thresholds of dispersive compensating mirrors applying nanolaminates 
    Willemsen, T.; Brinkmann, M.; Jupé, M.; Gyamfi, M.; Schlichting, S.; Ristau, Detlev (Bellingham, WA : S P I E - International Society for Optical Engineering, 2017)
    Ultra-short laser applications require high quality dielectric optics. The natural dispersion of light needs to be matched by dielectric components. However such dispersive components are very challenging for the deposition ...
  • Calibration accuracy of laser calorimetry for common crystal geometries 
    Willer, Yannick; Hao, Liu; Balasa, Istvan; Ristau, Detlev (Bellingham, WA : S P I E - International Society for Optical Engineering, 2017)
    An established method for precise determination of optical absorption is the so called laser calorimetry. According to ISO 115511 laser calorimetry is preferred to other photothermal test methods, because of its capability ...
  • Continuous detection of particles on a rotating substrate during thin film deposition 
    Rüsseler, Anna Karoline; Balasa, Istvan; Jensen, Lars; Ristau, Detlev (Bellingham : SPIE, 2018)
    Particles, which contaminate the substrate during thin film deposition, are prone to cause irremovable defects and demand special attention in the field of high precision laser optics as they can lead to localized absorption ...
  • 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 ...
  • Electrical and optical properties linked to laser damage behavior in conductive thin film materials 
    Steinecke, Morten; Naran, Tank Ankit; Keppler, Nils Christian; Behrens, Peter; Jensen, Lars; Jupé, Marco; Ristau, Detlev (Washington, DC : OSA - The Optical Society, 2021)
    Epsilon-near-zero-materials (ENZ-materials) and their unique properties are key to the successful integration and miniaturization of optical components. Novel concepts, which promise significant progress in this field of ...
  • Electronic quantization in dielectric nanolaminates 
    Willemsen, Thomas; Geerke, P.; Jupé, Marco; Gallais, L.; Ristau, Detlev (Bellingham, WA : S P I E - International Society for Optical Engineering, 2016)
    The scientific background in the field of the laser induced damage processes in optical coatings has been significantly extended during the last decades. Especially for the ultra-short pulse regime a clear correlation ...
  • Enhancement of the damage resistance of ultra-fast optics by novel design approaches 
    Willemsen, Thomas; Jupé, Marco; Gyamfi, Mark; Schlichting, Sebastian; Ristau, Detlev (Washington, DC : Optical Society of America, 2017)
    Dielectric components are essential for laser applications. Chirped mirrors are applied to compress the temporal pulse broadening crucial in the femtosecond regime. However, the design sensitivity and the electric field ...
  • Higher certainty of the laser-induced damage threshold test with a redistributing data treatment 
    Jensen, Lars; Mrohs, Marius; Gyamfi, Mark; Mädebach, Heinrich; Ristau, Detlev (College Park, MD : American Institute of Physics, 2015)
    As a consequence of its statistical nature, the measurement of the laser-induced damage threshold holds always risks to over- or underestimate the real threshold value. As one of the established measurement procedures, the ...
  • Improved LIDT values for dielectric dispersive compensating mirrors applying ternary composites 
    Willemsen, Thomas; Schlichting, S.; Gyamfi, M.; Jupé, Marco; Ehlers, H.; Morgner, Uwe; Ristau, Detlev (Bellingham, WA : S P I E - International Society for Optical Engineering, 2016)
    The present contribution is addressed to an improved method to fabricate dielectric dispersive compensating mirrors (CMs) with an increased laser induced damage threshold (LIDT) by the use of ternary composite layers. ...
  • Laser-induced degradation and damage morphology in polymer optical fibers 
    Kiedrowski, K.; Jakobs, F.; Kielhorn, J.; Johannes, H.-H.; Kowalsky, W.; Kracht, D.; Balasa, I.; Ristau, D. (Bellingham : SPIE, 2020)
    The radiation of pulsed laser systems can generate changes in various materials. On the one hand, these modifications can be used for a variety of applications i.e. laser welding, cutting and many more [1]. The precision ...
  • Measurement of the nonlinear refractive index in optical thin films 
    Steinecke, M.; Jupé, M.; Kiedrowski, K.; Ristau, D. (Bellingham, WA : S P I E - International Society for Optical Engineering, 2017)
    Based on the z-scan method, an interferometric set-up for measuring the optical Kerr-effect was engineered and optimized. Utilizing a Mach-Zehnder configuration, the wave front deformation caused by the Kerr induced ...
  • Thickness uniformity measurements and damage threshold tests of large-area GaAs/AlGaAs crystalline coatings for precision interferometry 
    Koch, P.; Cole, G.D.; Deutsch, C.; Follman, D.; Heu, P.; Kinley-Hanlon, M.; Kirchhoff, R.; Leavey, S.; Lehmann, J.; Oppermann, P.; Rai, A.K.; Tornasi, Z.; Wöhler, J.; Wu, D.S.; Zederbauer, T.; Lück, H. (Washington, DC : OSA - The Optical Society, 2019)
    Precision interferometry is the leading method for extremely sensitive measurements in gravitational wave astronomy. Thermal noise of dielectric coatings poses a limitation to the sensitivity of these interferometers. To ...
  • Ultrafast polychromatic ionization of dielectric solids 
    Jürgens, P.; Jupé, M.; Gyamfi, M.; Ristau, Detlev (Bellingham, WA : S P I E - International Society for Optical Engineering, 2016)
    The modeling of the laser-induced damage processes can be divided into thermal and electronic processes. Especially, electronic damage seems to be well understood. In corresponding models, the damage threshold is linked ...
  • Waterproof coatings for high-power laser cavities 
    Cheng, Xinbin; Dong, Siyu; Zhi, Song; Paschel, Sebastian; Balasa, Istvan; Ristau, Detlev; Wang, Zhanshan (London : Nature Publishing Group, 2019)
    With the ever-increasing laser power and repetition rate, thermal control of laser media is becoming increasingly important. Except for widely used air cooling or a bonded heat sink, water cooling of a laser medium is more ...