• Wavefront sensorless adaptive optics for optical coherence tomography guided femtosecond laser surgery in the posterior eye 

  Zabic, M.; Matthias, B.; Hahn, J.; Heisterkamp, A.; Meyer, H.; Ripken, T. (Bellingham : SPIE, 2019)

  Surgery with fs-laser in the posterior part of the eye could be useful for separation of tractional epiretinal membrane and vitreous floaters treatment. However, focus degradation occurs near the retina due to induced ...
• Transmission and reflection features of all-dielectrics metasurfaces with electric and magnetic resonances 

  Terekhov, P.D.; Babicheva, V.E.; Baryshnikova, K.V.; Shalin, A.S.; Karabchevsky, A.; Evlyukhin, A.B. (Bellingham : SPIE, 2019)

  The effective multipole decomposition approach is applied to study the optical features of the silicon metasurface in the near-infrared. The spectral regions of perfect transmission and reflection have been analyzed using ...
• Standardization in optics characterization 

  Ristau, D.; Balasa, I.; Jensen, L. (Bellingham : SPIE, 2018)

  An adapted quality management is a major prerequisite for the reliable production of optical components and coatings. Especially laser applications impose highest demands on modern optical systems and can be considered as ...
• Integrated atomic quantum technologies in demanding environments: Development and qualification of miniaturized optical setups and integration technologies for UHV and space operation 

  Christ, M.; Kassner, A.; Smol, R.; Bawamia, A.; Peters, A.; Wurz, M.; Rasel, E.; Wicht, A.; Krutzik, M. (Bellingham : SPIE, 2018)

  Employing compact quantum sensors in field or in space (e.g., small satellites) implies demanding requirements on components and integration technologies. Within our work on integrated sensors, we develop miniaturized, ...
• Measurement setup for the determination of the nonlinear refractive index of thin films with high nonlinearity 

  Steinecke, M.; Kellermann, T.; Jupé, M.; Ristau, D.; Jensen, L. (Bellingham : SPIE, 2018)

  The exploitation of nonlinear effects in multi-layer thin films allows for optics with novel functions, such as all-optical switching and frequency conversion. In this contribution, an improved interferometric setup for ...
• Laser-induced pit formation in UV-Antireflective coatings 

  Paschel, S.; Balasa, I.; Jensen, L.O.; Cheng, X.; Wang, Z.; Ristau, D. (Bellingham : SPIE, 2018)

  Previous studies have shown that nanometer scale defects can lead to the formation of submicrometer craters, if located in coatings with a relatively small thickness. Due to the small size, such damages are challenging to ...
• 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 ...
• Hydrogels for light delivery in in vivo optogenetic applications 

  Johannsmeier, S.; Torres-Mapa, M.L.; Ripken, T.; Heinemann, D.; Heisterkamp, A. (Bellingham : SPIE, 2019)

  Biocompatible hydrogels present interesting opportunities for in vivo waveguiding for optogenetic or photomedical applications. Here, we investigate the applicability of poly(ethylene glycol) diacrylate hydrogels in ...
• Continuous detection of particles on a rotating substrate during thin film deposition 

  Rüsseler, A.K.; Balasa, I.; Jensen, L.; Ristau, D. (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 ...
• Dynamic coherent beam combining based on a setup of microlens arrays 

  Prossotowicz, M.; Heimes, A.; Flamm, D.; Jansen, F.; Otto, H.-J.; Budnicki, A.; Morgner, U.; Killi, A. (Bellingham : SPIE, 2020)

  A novel optical concept is introduced with standard components for highly efficient coherent beam combining a system of (N x N) beams. In a proof-of-principle experiment a well-defined setup with microlens arrays (MLAs) ...
• CPA-free amplification of sub-10 ps pulses in Ho:YLF to the mJ-level at 2 μm wavelength 

  Hinkelmann, M.; Schulz, B.; Wandt, D.; Morgner, U.; Frede, M.; Neumann, J.; Kracht, D. (Bellingham : SPIE, 2019)

  The generation of sub-10 ps pulses around a wavelength of 2 μm with pulse energy at millijoule-level in a compact CPA-free amplifier chain is presented. This laser source covers a broad range of pulse repetition frequencies ...
• Determination of the laser-induced damage threshold of polymer optical fibers 

  Kiedrowski, K.; Thiem, J.; Jakobs, F.; Kielhorn, J.; Balasa, I.; Kracht, D.; Ristau, D. (Bellingham : SPIE, 2018)

  Investigating the properties of manufactured polymer optical fibers is essential to determine proper areas of application. Using pulsed laser radiation, especially with respect to laser activity in optical fibers, the ...
• Concept for high speed vocal cord imaging with swept-source optical coherence tomography 

  Zabic, M.; Sharifpourboushehri, S.; Müller-Wirts, L.; Benecke, H.; Heisterkamp, A.; Meyer, H.; Ripken, T. (Bellingham : SPIE, 2019)

  Optical coherence tomography (OCT) enables non-invasive depth-resolved investigation of laryngeal tissue. However, with conventional systems, OCT cross-sectional images of vibrating vocal cords always suffer from motion ...
• Amplification of ultrafast pulses in an extended Mamyshev regenerator 

  Repgen, P.; Wandt, D.; Morgner, U.; Neumann, J.; Kracht, D. (Bellingham : SPIE, 2020)

  We present the characteristics of a high-energy ultrafast Yb-fiber laser system, based on a Mamyshev oscillator and a subsequently arranged fiber amplifier stage. The Mamyshev oscillator emits pulses at a repetition rate ...
• Space charge layer effects in silicon studied by in situ surface transport 

  Edler, Frederik; Miccoli, Ilio; Pfnür, Herbert; Tegenkamp, Christoph (Bristol : Institute of Physics Publishing, 2019)

  Electronic properties of low dimensional structures on surfaces can be comprehensively explored by surface transport experiments. However, the surface sensitivity of this technique to atomic structures comes along with the ...
• Roadmap on STIRAP applications 

  Bergmann, Klaas; Nägerl, Hanns-Christoph; Panda, Cristian; Gabrielse, Gerald; Miloglyadov, Eduard; Quack, Martin; Seyfang, Georg; Wichmann, Gunther; Ospelkaus, Silke; Kuhn, Axel; Longhi, Stefano; Szameit, Alexander; Pirro, Philipp; Hillebrands, Burkard; Zhu, Xue-Feng; Zhu, Jie; Drewsen, Michael; Hensinger, Winfried K.; Weidt, Sebastian; Halfmann, Thomas; Wang, Hai-Lin; Paraoanu, Gheorghe Sorin; Vitanov, Nikolay V.; Mompart, Jordi; Busch, Thomas; Barnum, Timothy J.; Grimes, David D.; Field, Robert W.; Raizen, Mark G.; Narevicius, Edvardas; Auzinsh, Marcis; Budker, Dmitry; Pálffy, Adriana; Keitel, Christoph H. (Bristol : Institute of Physics Publishing, 2019)

  STIRAP (stimulated Raman adiabatic passage) is a powerful laser-based method, usually involving two photons, for efficient and selective transfer of populations between quantum states. A particularly interesting feature ...
• Rational Maxwell knots via de Sitter space 

  Lechtenfeld, Olaf; Zhilin, G. (Bristol : Institute of Physics Publishing, 2019)

  We set up a correspondence between solutions of the Yang-Mills equations on × S 3 and in Minkowski spacetime via de Sitter space. Some known Abelian and non-Abelian exact solutions are rederived. For the Maxwell case we ...
• Extended supersymmetric multiparticle Euler-Calogero-Moser model 

  Krivonos, S.; Lechtenfeld, O.; Sutulin, A. (Bristol : Institute of Physics Publishing, 2019)

  We review the construction of supersymmetric extension of the n-particle Euler-Calogero-Moser model within the Hamiltonian approach [1]. The main feature of the proposed supersymmetrization method is that it is automatically ...
• Advanced quantum techniques for future gravitational-wave detectors 

  Danilishin, Stefan L.; Khalili, Farid Ya; Miao, Haixing (Heidelberg : Springer Verlag, 2019)

  Quantum fluctuation of light limits the sensitivity of advanced laser interferometric gravitational-wave detectors. It is one of the principal obstacles on the way towards the next-generation gravitational-wave observatories. ...
• PT deformation of Calogero-Sutherland models 

  Correa, F.; Lechtenfeld, O. (Heidelberg : Springer Verlag, 2019)

  Calogero-Sutherland models of N identical particles on a circle are deformed away from hermiticity but retaining a PT symmetry. The interaction potential gets completely regularized, which adds to the energy spectrum an ...

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