Ralf Hellmann, Prof. Dr.
Professor Studiengang Elektro- und Informationstechnik

Telefon: +49 6021/4206-874
Fax: +49 6021/4206-801
Ralf.Hellmann@th-ab.de

Raum: C1/24/104

Sprechzeiten

Dienstag, 15:45-16:45 Uhr

Lehrgebiete

Physik
Werkstofftechnik
Halbleitertechnologie
Lasertechnik

Fachgebiete

Physik
Werkstofftechnik
Halbleitertechnologie
Lasertechnik

Veroeffentlichungen

  • Kefer, Stefan, Rosenberger, Manuel, Hessler, Steffen, Girschikofsky, Maiko, Belle, Stefan, Roth, Gian-Luca, Schmauß, Bernhard, Hellmann, Ralf, 2020. Fabrication and Applications of Polymer Planar Bragg Grating Sensors based on Cyclic Olefin Copolymers. In: 2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall). Institute of Electrical and Electronics Engineers, S. 647 – 655. ISBN 978-1-7281-5304-9.
  • Kefer, Stefan, Sauer, Theresia, Hessler, Steffen, Kaloudis, Michael, Schmauß, Bernhard, Hellmann, Ralf, 2020. Robust Polymer Planar Bragg Grating Sensors Embedded in Commercial-Grade Composites. In: Polymers. 12(3), S. 715 – 715. Volltext verfügbar unter
  • Roth, Gian-Luca, Esen, Cemal, Hellmann, Ralf, 2020. Internal micro structuring of transparent optical polymers by fs laser. In: Laser-based Micro-and Nanoprocessing XIV 2020. International Society for Optics and Photonics, S. 112681L.
  • Roth, Gian-Luca, Rung, Stefan, Esen, Cemal, Hellmann, Ralf, 2020. Microchannels inside bulk PMMA generated by femtosecond laser using adaptive beam shaping. In: Optics Express. 28(4), S. 5801 – 5811.
  • Schwarz, Simon, Rung, Stefan, Esen, Cemal, Hellmann, Ralf, 2020. Rapid fabrication of precise glass axicon arrays by an all laser-based manufacturing technology. In: Journal of Laser Applications. 32(1), S. 012001 – 012001.
  • Dudutis, Juozas, Pipiras, Jokūbas, Schwarz, Simon, Rung, Stefan, Hellmann, Ralf, Račiukaitis, Gediminas, Gečys, Paulius, 2020. Laser-fabricated axicons challenging the conventional optics in glass processing applications. In: Optics Express. 28(4), S. 5715 – 5730.
  • Schwarz, Simon, Rung, Stefan, Esen, Cemal, Hellmann, Ralf, 2020. All laser-based fabrication of optical elements. In: Proceedings of SPIE 11270, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XX.
  • Flachs, Dennis, Emmerich, Florian, Roth, Gian-Luca, Hellmann, Ralf, Thielemann, Christiane, 2019. Laser-bonding of FEP/FEP interfaces for a flexiblemanufacturing process of ferroelectrets. In: Journal of Physics: Conference Series. 1407(012107), S. 1 – 5.
  • Sauer, Theresia, Kefer, Stefan, Ruppert, Wolfgang, Hellmann, Ralf, Kaloudis, Michael, 2019. Integration of Bragg grating sensors in components made of carbon fiber reinforced polymers. In: Tagungsband der 20. GMA/ITG-Fachtagung Sensoren und Messsysteme 2019, 25.06.2019 - 26.06.2019, Nürnberg, Deutschland. S. 806 – 810. ISBN 978-3-9819376-0-2. Volltext verfügbar unter
  • Rung, Stefan, Bokan, Kevin, Kleinwort, Frederick, Schwarz, Simon, Simon, Peter, Klein-Wiele, Jan-Hendrik, Esen, Cemal, Hellmann, Ralf, 2019. Possibilities of Dry and Lubricated Friction Modification Enabled by Different Ultrashort Laser-Based Surface Structuring Methods. In: Lubricants. 7(43), S. 1 – 13. Volltext verfügbar unter
  • Trautmann, Anika, Roth, Gian-Luca, Nujiqi, Benedikt, Walter, Thomas, Hellmann, Ralf, 2019. Towards a versatile point-of-care system combining femtosecond laser generated microfluidic channels and direct laser written microneedle arrays. In: Microsystems & Nanoengineering. 5(6), S. 1 – 9.
  • Roth, Gian-Luca, Esen, Cemal, Hellmann, Ralf, 2019. Circular microchannels inside bulk polymethylmethacrylate generated by femtosecond laser using slit beam shaping. In: Journal of Laser Applications. 31(2), S. 022603-1 – 022603-5.
  • Roth, Gian-Luca, Esen, Cemal, Hellmann, Ralf, 2019. A New Approach to Seal Polymer Microfluidic Devices Using Ultrashort Laser Pulses. In: Journal of Laser Micro/Nanoengineering. 14(1), S. 49 – 53.
  • Roth, Gian-Luca, Wolf, Bastian, Esen, Cemal, Hellmann, Ralf, 2019. Generation of internal 3D microfluidic architectures in polymers by fs laser processing. In: Lasers in Manufacturing 2019.
  • Dudutis, Juozas, Pipiras, Jokūbas, Schwarz, Simon, Rung, Stefan, Hellmann, Ralf, Račiukaitis, Gediminas, Gečys, Paulius, 2019. Glass cutting by oblate-tip axicon-generated Bessel-Gaussian beams. In: Open Readings, 63rd International Conference for Students of Physics and Natural Sciences.
  • Dudutis, Juozas, Pipiras, Jokūbas, Schwarz, Simon, Rung, Stefan, Hellmann, Ralf, Gečys, Paulius, 2019. Bessel beam formation with all laser fabricated axicon - case of glass dicing applications. In: COLA 2019, 15th International Conference on Laser Ablation.
  • Rung, Stefan, Bokan, Kevin, Rutsch, Kevin, Schwarz, Simon, Esen, Cemal, Hellmann, Ralf, 2018. Laser Induced Periodic Surface Structures on 100Cr6 Steel for Modification of Friction Demonstrated with Stribeck Test. In: Journal of Laser Micro/Nanoengineering. 13(3), S. 160 – 165. Volltext verfügbar unter
  • Roth, Gian-Luca, Esen, Cemal, Hellmann, Ralf, 2018. Control of femtosecond laser generated microfluidic channels inside poly (methyl methacrylate). In: Journal of Laser Applications. 30(3), S. 032016-1 – 032016-6.
  • Schwarz, Simon, Rung, Stefan, Esen, Cemal, Hellmann, Ralf, 2018. Fabrication of a high-quality axicon by femtosecond laser ablation and CO2 laser polishing for quasi-Bessel beam generation. In: Optics Express. 26(18), S. 23287 – 23294.
  • Schwarz, Simon, Rung, Stefan, Esen, Cemal, Hellmann, Ralf, 2018. Surface plasmon polariton triggered generation of 1D-low spatial frequency LIPSS on fused silica. In: Applied Sciences. 2018(8/9), S. 1624 – 1624.
  • Roth, Gian-Luca, Esen, Cemal, Hellmann, Ralf, 2018. Vertical Microchannels for Microfluidic Multilayer Interconnections in PMMA. In: Journal of Laser Micro/Nanoengineering. 13(3), S. 155 – 159.
  • Roth, Gian-Luca, Esen, Cemal, Hellmann, Ralf, 2018. Laser beam microwelding of transparent plastics. In: Joining Plastics. 12(3/4), S. 2 – 8.
  • Schwarz, Simon, Rung, Stefan, Esen, Cemal, Hellmann, Ralf, 2018. Homogeneous low spatial frequency LIPSS on dielectric materials generated by beam-shaped femtosecond pulsed laser irradiation. In: Journal of Laser Micro/Nanoengineering. 13(2), S. 90 – 94.
  • Schwarz, Simon, Rung, Stefan, Esen, Cemal, Hellmann, Ralf, 2018. Surface Plasmon Polariton Triggered Generation of 1D-Low Spatial Frequency LIPSS on Fused Silica. In: Applied Sciences. 8(9), S. 1624 – 1624.
  • Schwarz, Simon, Rung, Stefan, Esen, Cemal, Hellmann, Ralf, 2018. Influence of pulse duration on high-precision manufacturing of 3D geometries. In: Journal of Laser Micro/Nanoengineering. 13(3), S. 292 – 295.
  • Schwarz, Simon, Rung, Stefan, Esen, Cemal, Hellmann, Ralf, 2018. Axicon fabrication with ultrashort and CO2 laser. In: LPM2018 The 19th International Symposium on Laser Precision Microfabrication.
  • Schwarz, Simon, Esen, Cemal, Hellmann, Ralf, 2018. CO2 laser polishing of femtosecond shaped micro-optical components. In: 3rd Conference on Laser Polishing LaP 2018.
  • Schwarz, Simon, Esen, Cemal, Hellmann, Ralf, 2018. Homogeneous low spatial frequency LIPSS on dielectrics generated by beam-shaped femtosecond pulsed laser irradiation. In: LPM2018 The 19th International Symposium on Laser Precision Microfabrication.
  • Roth, Gian-Luca, Esen, Cemal, Hellmann, Ralf, 2017. Femtosecond laser direct generation of 3D-microfluidic channels inside bulk PMMA. In: Optics Express. 25(15), S. 18442 – 18450.
  • Roth, Gian-Luca, Rung, Stefan, Hellmann, Ralf, 2017. Ultrashort pulse laser micro-welding of cyclo-olefin copolymers. In: Optics and Lasers in Engineering. S. 178 – 181.
  • Schwarz, Simon, Rung, Stefan, Hellmann, Ralf, 2017. One-dimensional low spatial frequency LIPSS with rotating orientation on fused silica. In: Applied Surface Science. 2017(411), S. 113 – 116.
  • Adelmann, Benedikt, Hellmann, Ralf, 2017. Temperature and stress simulation of 4H-SiC during laser-induced silicidation for ohmic contact generation. In: Metals. 2017(7), S. 545 – 553.
  • Adelmann, Benedikt, Hellmann, Ralf, 2017. A study of SiC decomposition under laser irradiation. In: Applied Physics A. 2017(123), S. 454 – 452.
  • Schwarz, Simon, Hellmann, Ralf, 2017. Fabrication of Cylindrical Lenses by Combining Ultrashort Pulsed Laser and CO2 Laser. In: Journal of Laser Micro/Nanoengineering. 12(2), S. 76 – 79.
  • Schwarz, Simon, Rung, Stefan, Hellmann, Ralf, 2017. Two-Dimensional Low Spatial Frequency Laser-Induced Periodic Surface Structuring of Sapphire. In: Journal of Laser Micro/Nanoengineering. 12(2), S. 67 – 71.
  • Schleier, Max, Adelmann, Benedikt, Neumeier, Benedikt, Hellmann, Ralf, 2017. Burr formation detector for fiber laser cutting based on a photodiode sensor system. In: Optics & Laser Technology. 96(-), S. 13 – 17.
  • Schleier, Max, Adelmann, Benedikt, Esen, Cemal, Hellmann, Ralf, 2017. Cross-correlation-based algorithm for monitoring laser cutting with high-power fiber lasers. In: IEEE Sensors Journal. 18(4), S. 1585 – 1590.
  • Schwarz, Simon, Rung, Stefan, Hellmann, Ralf, 2017. High quality one-dimensional low spatial frequency LIPSS on sapphire generated by Top-Hat beam shaped ultrashort-pulsed laser. In: MultiScience - XXXI. microCAD International Multidisciplinary Scientific Conference.
  • Roth, Gian-Luca, Rung, Stefan, Hellmann, Ralf, 2016. Welding of transparent polymers using femtosecond laser. In: Applied Physics A. 122(2), S. 86 – 90.
  • Adelmann, Benedikt, Hellmann, Ralf, 2016. Numerical and experimental study on flexural strength of laser microstructured alumina. In: Advances in Ceramic Science and Engineering. 2016(5), S. 28 – 34.
  • Adelmann, Benedikt, Hellmann, Ralf, 2016. SiC absorption of near-infrared laser radiation at high temperatures. In: Applied Physics A. 2016(122), S. 1 – 7.
  • Adelmann, Benedikt, Hellmann, Ralf, 2016. Photodiode-based cutting interruption sensor for near-infrared lasers. In: Applied Optics. 2016(55/7), S. 1772 – 1778.
  • Preusch, Florian, Rung, Stefan, Hellmann, Ralf, 2016. Influence of Polishing Orientation on the Generation of LIPSS on Stainless Steel. In: Journal of Laser Micro/Nanoengineering. S. 137 – 142.
  • Schwarz, Simon, Rung, Stefan, Hellmann, Ralf, 2016. Generation of laser-induced periodic surface structures on transparent material-fused silica. In: Applied Physics Letters. 108(18), S. 181607 – 181607.
  • Schwarz, Simon, Rung, Stefan, Hellmann, Ralf, 2016. Simulation of process parameters towards the generation of low spatial frequency LIPSS on dielectric materials. In: MultiScience - XXX. microCAD International Multidisciplinary Scientific Conference.
  • Adelmann, Benedikt, Hellmann, Ralf, 2015. Comparative study of experimentally determined and simulated mechanical strength of fiber laser cut alumina substrates. In: Proceedings of the 7th International Congress on Laser Advanced Materials Processing. S. 1 – 9.
  • Adelmann, Benedikt, Hellmann, Ralf, 2015. Rapid micro hole laser drilling in ceramic substrates using single mode fiber laser. In: Journal of Materials Processing Technology. 2015(221), S. 80 – 86.
  • Roth, Gian-Luca, Adelmann, Benedikt, Hellmann, Ralf, 2015. Cutting and Drilling of SiC Semiconductor by Fiber Laser. In: Journal of Laser Micro/Nanoengineering. 10(3), S. 279 – 283.
  • Adelmann, Benedikt, Neumeier, Benedikt, Schleier, Max, Wilmann, Eugen, Hellmann, Ralf, 2015. Optical cutting tear detection system for industrial fiber laser based cutting machines. In: Lasers in Manufacturing Conference 2015.
  • Adelmann, Benedikt, Schleier, Max, Neumeier, Benedikt, Wilmann, Eugen, Hellmann, Ralf, 2015. Optical cutting interruption sensor for fiber lasers. In: Applied Sciences. 2015(5/3), S. 544 – 554.
  • Adelmann, Benedikt, Ngo, Chan, Hellmann, Ralf, 2015. High aspect ratio cutting of metals using water jet guided laser. In: The International Journal of Advanced Manufacturing Technology. 2015(80), S. 2053 – 2060.
  • Adelmann, Benedikt, Roth, Gian-Luca, Hellmann, Ralf, 2015. Back side ablation of SiC diodes using a q-switched NIR laser. In: Journal of Laser Micro/Nanoengineering. S. 190 – 194.
  • Adelmann, Benedikt, Hellmann, Ralf, 2014. Investigation on Flexural Strength Changes of Alumina Caused by Cutting using Fiber Laser. In: Journal of Laser Micro/Nanoengineering. 9(2), S. 153.
  • Rung, Stefan, Bischoff, Christian, Jäger, Erwin, Umhofer, Udo, Hellmann, Ralf, 2014. Laser thin film ablation with multiple beams and tailored beam profiles. In: Proceedings of SPIE 8967, Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XIX.
  • Rung, Stefan, Christiansen, Anne, Hellmann, Ralf, 2014. Influence of film thickness on laser ablation threshold of transparent conducting oxide thin-films. In: Applied Surface Science. S. 347 – 351.
  • Rung, Stefan, Barth, Johannes, Hellmann, Ralf, 2014. Characterization of Laser Beam Shaping Optics Based on Their Ablation Geometry of Thin Films. In: Micromachines. 5(4), S. 943 – 953.
  • Jäger, Erwin, Rädel, Ulrich, Bischoff, Christian, Umhofer, Udo, Rung, Stefan, Hellmann, Ralf, 2014. Laser micromachining – parallel processing with multiple top hat beams. In: 8th International Conference on Photonic Technologies LANE 2014.
  • Preusch, Florian, Adelmann, Benedikt, Hellmann, Ralf, 2014. Micromachining of AlN and Al2O3 using fiber laser. In: Micromachines. 2014(5), S. 1051 – 1060.
  • Adelmann, Benedikt, Hellmann, Ralf, 2013. Process optimization of laser fusion cutting of multilayer stacks of electrical sheets. In: International Journal of Advanced Manufacturing Technology. S. 2693 – 2701.
  • Hasenstab, Stefan, Adelmann, Benedikt, Hellmann, Ralf, 2013. Laser Cutting of Alumina and Aluminum Nitride with a 500 W Single Mode Fiber Laser. In: XXVII. microCAD International Scientific Conference.
  • Adelmann, Benedikt, Hürner, Andreas, Schlegel, Tobias, Bauer, Anton, Frey, Lothar, Hellmann, Ralf, 2013. Laser Alloying Nickel on 4H-Silicon Carbide Substrate to Generate Ohmic Contacts. In: Journal of Laser Micro/Nanoengineering. 8(1), S. 97 – 101.
  • Hürner, Andreas, Schlegel, Tobias, Adelmann, Benedikt, Mitlehner, Heinz, Hellmann, Ralf, Bauer, Anton, Frey, Lothar, 2013. Alloying of Ohmic Contacts to n-type 4H-SiC via Laser Irradiation. In: Materials Science Forum. S. 773 – 776.
  • Adelmann, Benedikt, Hellmann, Ralf, 2013. Investigation on Flexural Strength during Fiber Laser Cutting of Alumina. In: Physics Procedia. S. 405 – 407.
  • Rung, Stefan, Rexhepi, Mal, Hellmann, Ralf, 2013. Beam shaping for enhanced through-put of laser ablation of transparent conductive films. In: Proceedings of the XXVII MicroCAD International Scientific Conference.
  • Rung, Stefan, Rexhepi, Mal, Bischoff, Christian, Hellmann, Ralf, 2013. Laserscribing of thin films using top-hat laser beam profiles. In: Journal of Laser Micro/Nanoengineering. 8(3), S. 309 – 314.
  • Heilmann, Eva-Maria, Kowalski, Thomas, Hellmann, Ralf, Teigelkötter, Johannes, 2012. Water Jet Guided Laser Cutting of High Temperature Superconductors. In: Journal of Laser Micro- and Nanoengineering. 8(1), S. 70 – 74.
  • Hellmann, Ralf, Gockel, Tilo, 2012. Optische Charakterisierung von Leuchtdioden. In: Zeitschrift ELEKTOR, Sonderheft LED-Special 4 – Leuchtdioden in Theorie und Praxis, 2012. 9, S. 40 – 46.
  • Kalmár, László, Hellmann, Ralf, Régert, Tamás, Varga, Zoltan, 2012. Numerical investigation of unsteady heat transport procedure in high power LED module. In: GEP. S. 43 – 46.
  • Hock, Klaus, Adelmann, Benedikt, Hellmann, Ralf, 2012. Comparative study of remote fiber laser and water-jet guided laser cutting of thin film metal sheets. In: Physics procedia. S. 225 – 231.
  • Kalmár, László, Hellmann, Ralf, Régert, Tamás, Varga, Zoltan, 2012. Numerical investigation of heat transport procedure in high power LED modules. In: Proceedings of the XXVI International MicroCAD Conference, Miskolc (Hungary). S. 43 – 46.
  • Girschikofsky, Maiko, Rosenberger, Manuel, Belle, Stefan, Hellmann, Ralf, 2012. Surface modifications of planar bragg grating refractive index sensors for gas detection. In: Proceedings of the XXVI International MicroCAD Conference – Sensing Technologies, Miskolc (Hungary).
  • Girschikofsky, Maiko, Rosenberger, Manuel, Belle, Stefan, Brutschy, Malte, Waldvogel, Siegfried, Hellmann, Ralf, 2012. α-Cyclodextrin functionalized planar Bragg grating sensor for the detection of small arene traces in solvamt vapour. In: 14th international meeting on chemical sensors (IMCS 2012). S. 646 – 648. ISBN 978-3-9813484-2-2.
  • Koller, Georg, Hessler, Steffen, Rosenberger, Manuel, Belle, Stefan, Hellmann, Ralf, 2012. Micro-structured optical waveguide fabrication in PMMA using low frequency reactive ion etching. In: Proceedings of the XXVI International MicroCAD Conference – Sensing Technologies, Miskolc (Hungary).
  • Schneider, Johannes, Bochtler, Ulrich, Hellmann, Ralf, Kaloudis, Michael, Gockel, Tilo, 2012. LUVLED III – Optimierung eines Kühlkonzeptes zur Aktivluftkühlung eines Hochleistungs-UV-LED-Moduls. In: Zeitschrift ELEKTOR, Sonderheft LED-Special 4 – Leuchtdioden in Theorie und Praxis, 2012. 9, S. 20 – 29.
  • Rung, Stefan, Hellmann, Ralf, 2012. Laser scribing of metallized transparent conductive oxide – A comparative study using top hat and Gaussian beam profiles. In: Proceedings of the XXVI International MicroCAD Conference – Material Processing Technologies.
  • Bischoff, Christian, Jäger, Erwin, Rung, Stefan, Hellmann, Ralf, 2012. Diffractive beam shaping optics for efficient micromachining. In: Proceedings of the LASYS (Internationale Fachmesse für Laser-Materialbearbeitung) – SLT (Stuttgarter Lasertage) 2012.
  • Bischoff, Christian, Rung, Stefan, Hellmann, Ralf, 2012. Efficient micromachining of thin film layers with nanosecond lasers – beam shaping optics improve process quality and enhance throughput. In: Laser Technik Journal. 9(5), S. 15 – 20.
  • Heilmann, Eva-Maria, Hellmann, Ralf, 2011. High Speed Fibre Laser Material processing of Stainless Steel Tapes Under Tension. In: XXV International MicroCAD Conference - Material Processing Technologies, Miskolc (Hungary), 21-25.
  • Kalmár, László, Hellmann, Ralf, Régert, Tamás, Varga, Zoltan, 2011. Numerical simulation of heat transfer procedure in high power LED modules. In: Proceedings of the 12th technical and scientific meeting. S. 18 – 20.
  • Risch, Anna, Christiansen, Anne, Hellmann, Ralf, Gockel, Tilo, 2011. Laserstrukturierung vonTCOs zur Herstellung organischer Leuchtdioden. In: Elektor, Sonderheft LEDs 3. 9, S. 39 – 41.
  • Gockel, Tilo, Engel, Michael, Hellmann, Ralf, 2011. 3D Laserscanning mit Linienlaser und Smart Camera – Systemauslegung mit Rasterlinsenoptik und Scheimpflugentzerrung. In: Elektor Sonderheft LEDs 3. 9, S. 79 – 84.
  • Heilmann, Eva-Maria, Hellmann, Ralf, 2011. Water jet guided laser cutting using a green disc laser. In: Proceeding XXV microCAD, International scientific conference, 2011, Section K: Material science/Material processing technologies.
  • Risch, Anna, Hellmann, Ralf, 2011. Laser Scribing of Gallium Doped Zinc Oxide Thin Films using Picosecond Laser. In: Applied Surface Science. 258(5), S. 1849 – 1853.
  • Hellmann, Ralf, Moorhouse, Colin, 2011. Laser patterning of transparent electrode films, from solar panels through high-end display. In: Industrial Laser Solutions Magazine. 11,
  • Heilmann, Eva-Maria, Hellmann, Ralf, Seidl, Albrecht, 2011. Water Jet Guided Laser Cutting of Silicon Thin Films Using 515nm Disc Laser. In: Journal of Laser Micro- and Nanoengineering. 6(2), S. 168.
  • Adelmann, Benedikt, Hellmann, Ralf, 2011. Fast Laser Cutting Optimization Algorithm. In: Physics Procedia 12-1, Elsevier Properties S.A. 12(Part A), S. 591 – 598.
  • Risch, Anna, Hellmann, Ralf, 2011. Picosecond Laser Patterning of ITO Thin Films. In: Physics Procedia 12-1, Elsevier Properties S.A. 12, S. 133 – 140.
  • Adelmann, Benedikt, Hellmann, Ralf, 2011. Different modulation schemes in fibre laser cutting. In: Proceeding XXV microCAD, International scientific conference, 2011, Section K: Material science/Material processing technologies. S. 1 – 6.
  • Adelmann, Benedikt, Hellmann, Ralf, 2011. DOE based optimization of fibre laser cutting of metals. In: Proceeding XXV microCAD, International scientific conference, 2011, Section K: Material science/Material processing technologies. S. 7 – 12.
  • Risch, Anna, Hellmann, Ralf, 2011. Laser induced modification of GZO thin film. In: Proceeding XXV microCAD, International scientific conference, 2011, Section K: Material science/Material processing technologies. S. 69 – 74.
  • Risch, Anna, Hellmann, Ralf, 2011. ITO thin film laser patterning by picosecond laser. In: Proceeding XXV microCAD, International scientific conference, 2011, Section K: Material science/Material processing technologies. S. 63 – 68.
  • Girschikofsky, Maiko, Rosenberger, Manuel, Belle, Stefan, Brutschy, Malte, Waldvogel, Siegfried, Hellmann, Ralf, 2011. Highly sensitive detection of naphthalene in solvent vapor using a functionalized PBG refractive index sensor. In: Sensors. 12(2), S. 2018 – 2025.
  • Belle, Stefan, Rosenberger, Manuel, Hellmann, Ralf, 2011. Evanescent wave planar bragg grating sensor for real-time detection of unlabelled biomolecules. In: Optics Express.
  • Girschikofsky, Maiko, Rosenberger, Manuel, Belle, Stefan, Brutschy, Malte, Waldvogel, Siegfried, Hellmann, Ralf, 2011. Optical planar bragg grating sensor for real-time detection of benzene, toluene und xylene in solvent vapour. In: Sensors & Actuators, B - Chemical. 171/172(8/9), S. 338 – 342.
  • Rosenberger, Manuel, Belle, Stefan, Hellmann, Ralf, 2011. Detection of biochemical reaction and DNA hybridization using a planar bragg grating sensor. In: Proceeding SPIE, Vol. 8073, article id: 80730C.
  • Rosenberger, Manuel, Belle, Stefan, Hellmann, Ralf, 2011. Optical interrogation of chemical and temperature bragg grating sensors using tunable fiber coupled bandpass filter. In: Proceeding XXV microCAD, International scientific conference, 2011, Section H. S. 25 – 30.
  • Rosenberger, Manuel, Belle, Stefan, Hellmann, Ralf, 2011. Detection of unlabeled DNA hybridization with a planar bragg grating sensor. In: Proceeding XXV microCAD, International scientific conference, 2011, Section R. S. 67 – 72.
  • Rosenberger, Markus, Belle, Stefan, Hellmann, Ralf, 2011. Detection of unlabeled DNA hybridization with a planar Bragg Grating Sensor. In: XXV International MicroCAD Conference – Sensing Technologies, Miskolc (Hungary). S. 67 – 72.
  • Belle, Stefan, Rosenberger, Manuel, Hellmann, Ralf, 2011. Optical fibre sensing in the production process and storage of biofuels. In: Proceeding XXV microCAD, International scientific conference, 2011, Section A. S. 21 – 26.
  • Amrhein, Frank, Kehrer, Martin, Schreck, Timo, Bochtler, Ulrich, Hellmann, Ralf, Kaloudis, Michael, 2011. UV-LED-Bestrahlung von Vergussmaterial: Schnelle Aushärtung auch im Schatten. In: adhäsion KLEBEN & DICHTEN. 5, S. 38 – 41.

Bemerkungen

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