A5080386628- Laser Material Processing Techniques
- Nonlinear Optical Materials Studies
- Photonic and Optical Devices
- Diamond and Carbon-based Materials Research
- Advanced Fiber Laser Technologies
- Advanced Surface Polishing Techniques
- Photochromic and Fluorescence Chemistry
- Thermal Radiation and Cooling Technologies
- Photonic Crystals and Applications
- Advanced Numerical Analysis Techniques
- Semiconductor Lasers and Optical Devices
- Ocular and Laser Science Research
- Cultural Heritage Materials Analysis
- Advanced Numerical Methods in Computational Mathematics
Leibniz University Hannover
2019-2023
Peter the Great St. Petersburg Polytechnic University
2017
Laser Zentrum Hannover
2016-2017
High-resolution, high-speed 3D printing by two-photon polymerization (2PP) with a Nd:YVO 4 Q-switched microchip laser at its fundamental wavelength of 1064 nm is demonstrated.Polymerization scan speeds up to 20 mm/s and feature sizes 250 are achieved using high repetition rate semiconductor saturable absorber mirror (SESAM) photoresist new photo-initiator bearing 6dialkylaminobenzufuran as electron donor indene-1,3-dione moiety acceptor.The obtained results demonstrate the potential lasers...
We present novel waveguide writing concepts in bulk PMMA. The relies on laser induced modification tracks that are completely surrounding a core. found the optimal parameters to construct highly reproducible, single-mode waveguides with minimal propagation losses down 0.6 dB cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> . Employing best geometry, we demonstrate 2D and 3D Y-splitters building blocks for creating complex optical...
The phononic band diagram of a periodic square structure fabricated by femtosecond laser pulse-induced two photon polymerization is recorded Brillouin light scattering (BLS) at hypersonic (GHz) frequencies and computed finite element method. theoretical calculations along the main symmetry directions quantitatively capture diagrams air- liquid-filled moreover represent BLS intensities. theory helps identify observed modes, reveals origin bandgaps zone boundaries, unravels direction dependent...
Abstract In this contribution, we apply adaptive finite elements to the Boussinesq model. Adaptivity is achived with goal‐oriented error control and local mesh refinement. The principle goal motivated from laser material processing waveguide writing in which starts flow due laser‐induced heat generation. Flow of decribed by Boussinseq equations. Our model substantiated some numerical tests order show capacities our schemes.
In this work the application of high repetition rate Nd:YVO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> Q-switched microchip laser with SESAM for 3D micro-/nano-fabrication by two-photon polymerization is presented. Energy pulses generated about 95 nJ pulse duration 90 ps and up to 500 kHz. Optimal photo-initiator selected allowing effective fabrication polymerization.
This research explores the creation of Type II waveguide configurations in diamond using femtosecond laser technology, focusing on enhancement light propagation pin-structures and extensive parameter investigation, offering significant advances fields photonics quantum sensing.
Writing waveguides with femtosecond laser is a very promising technique and has already proven its performance in glasses crystals. At the same time, writing polymers just developing field, not too much work been reported so far [1]. Polymer material can offer potential to create low-cost complex structures inside volume of material. It was demonstrated before that it possible make low-loss polymer by irradiation lines parallel orientation fixed gap between them [2]. The refractive index...
Writing waveguides with femtosecond laser is a very promising technique and has already proven its performance in glasses crystals. At the same time, writing polymers just developing field, not too much work been reported so far. Polymer material can offer potential to create low-cost complex structures inside volume of material. Singlemode propagation losses 0.6 µm are achieved by putting modifications, done laser, around waveguide core forming different geometries.
Polymer waveguides are designed and fabricated through femtosecond laser writing. We optimize the structure to achieve single-mode with minimum propagation losses of 0.6 dBcm −1 . also demonstrated challenging Y-splitters this novel technique.
Direct femtosecond writing is the simplest and most economical way to create waveguides in various media, which also allows creation of complex waveguide networks. When considering materials, polymers are particular interest because provide unlimited variations special compositions. Writing not an easy task that cannot be directly compared with schemes materials such as fused silica [2] . In recent times, successful laser using parameter selection have been reported [3] , but further...