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Cluster Report Photonics in the Capital Region Berlin-Brandenburg

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  • Photonics
  • Berlin
  • Optical
  • Laser
  • Technologies
  • Optics
  • Microsystems
  • Components
  • Brandenburg

5.1.1 Laser Technology

5.1.1 Laser Technology The Institute for Solid State Physics at the TU Berlin is also interested in basic facts: They investigate optical, electrical and magnetic properties of semiconductors, amorphous layers and hetero-structures. The knowledge is used for research, development and characterization of, among others, directly modulated, mode-locked or surface-emitting lasers. Together with the Institute of Physics at the Humboldt University in Berlin, the Heinrich- Hertz-Institute, FBH, MBI, and other research partners, the Institute is involved in the Cooperation NanOp which has the goal to combine nanostructures and optoelectronics. Technology on the rise – laser diodes from Berlin-Brandenburg Many companies utilize the knowledge gained by researchers in their business. Take the example of eagleyard Photonics, a spin-off of the FBH. They develop, manufacture and market highpower laser diodes. The latest products in their portfolio are new robust high-performance diodes with peak power up to 60 watts for pulsed applications, as well as a high-brilliancy singlemode laser diode with 800 mW output power. High-power laser diodes for extreme pulsed applications © eagleyard Photonics GmbH Production of laser bars © Jenoptik Diode Lab GmbH are used in material processing and general industrial and laboratory applications. PhotonTec is focused on complete modules, including optics and fibers for transmission of laser light. Moreover, PhotonTec offers solid-state lasers. At 457 nm wavelength, for example, lasers from PhotonTec reach ten watts of output power, a top value among commercially available products. The Jenoptik Group also produces in Berlin. Founded 2002 from a close cooperation between Jenoptik and the FBH, Jenoptik Diode Lab currently manufactures with over 70 employees optoelectronic semiconductor devices in Berlin, which are used later in development and manufacture of high power diode lasers at Jenoptik Laser Diode. Jenoptik invested about ten million Euro straight into a new manufacturing plant for laser bars in Berlin-Adlershof. Their extension to the preexisting manufacturing building is equipped with advanced production equipment and automated. In a manufacturing process typical for semiconductors, gallium arsenide wafers are structured into high-power laser bars and then further processed. The dynamic development in the field of laser diodes is demonstrated by the number of young companies in this field. PBC Lasers is a spin-off from the Institute for Solid State Physics at the TU Berlin; they develop laser diodes which combine high power and energy efficiency with high brightness of the emitted radiation. High-power lasers, laser modules and systems from PBC are used in material processing; they also work on future applications in medicine. Lumics also specializes on diodes. The company masters all assembly steps for the production of turnkey laser diode modules, from epitaxy to integration of all process steps. Created at the Max-Planck-Institute for Solid State Research in Stuttgart, it is a leading manufacturer of high power diode lasers and laser diodes. Laser Electronics also designs and manufactures high-power laser diode systems for pumping of solid state and fiber lasers which Fiber-coupled diode lasers for applications in industrial material processing, medical treatment and academic research © PhotonTec Berlin GmbH Specializing in short pulses Others focus on lasers with short pulses, for example LTB Lasertechnik Berlin. They offer short-pulse lasers for the entire spectral range, high-resolution spectrometers, and laser-based measurement technology. LTB also had a significant share of the LIMES system for the detection of melanomas and commercially markets the technology. Picoquant works on diode lasers which can produce ultra-short pulses. The pulse durations are typically in the picosecond range, the repetition rate is in the megahertz range. Advanced Laser Diode Systems (A.L.S.), a subsidiary of the Swiss laser technology provider onefive, is also dedicated to short pulses. The company is a leading manufacturer of photo-detectors and turnkey ultrashort-pulse laser systems with pulse lengths that also go down well into the picosecond range. 40

5.1.1 Laser Technology Powerhouses for many applications – solid-state lasers In many areas, solid-state lasers are still indispensable. For nearly 30 years, IBL Innovative Berlin Laser GmbH is researching and manufacturing; IBL’s products are used in areas such as engineering, semiconductors and photovoltaics, defense or research. They provide diode-pumped solid-state lasers with Q-switching for continuous or pulsed operation. The TITAN series Nd:YAG solid state laser are characterized by high pulse energies and pulse repetition rates. Applications for these lasers include machining, deflashing, OPO pumping, high-power PIV, LIBS and LIDAR. industry. How their technology, developed in-house, can be used is shown by the CryLaS subsidiary Secopta. Secopta develops and manufactures laser spectroscopic solutions for measurement applications in industry and in the security field. Using laser-induced breakdown spectroscopy (LIBS) and fast neural networks for evaluation of results, samples can be evaluated directly inside the process without special treatment. Up to 100 measurements per second are possible. Applications are found in the recycling area for the sorting of various materials and alloys, in the processing industry for process monitoring and quality assurance, as well as in the safety area for the detection of hazardous and harmful substances. Further applications, e.g. in biotechnology and medicine, will be developed. FiberLIBS application example © Secopta GmbH More than welding and structuring – research in material processing Q-switched pulsed laser with pulse energies up to 800 mJ and pulse repetition rates up to 1 kHz © IBL Innovative Berlin Laser GmbH Adlares offers a detection module that can test - from the air - gas lines for leaks. Polytec GmbH offers spectroscopic measurement systems and fiber lasers in the pico-and femtosecond range, optical amplifiers and component test systems. F&K Physiktechnik in Potsdam offers ultrasound technology for chip fabrication and alignment lasers for lining up machinery and parts, as well as opto-electronic measurement systems. Vistac in Teltow in Brandenburg offers a blindman’s stick which scans the environment via laser and warns of obstacles. This principle is also used for collision avoidance sensors. Crystal Laser System, or CryLaS for short, develops, manufactures, and delivers diode pumped solid state lasers in the deep UV, UV, VIS and IR ranges for various applications in science, research and OEM laser units © CryLaS GmbH Laser material processing is being intensively researched: how to increase the accuracy? How can materials be combined for which this was not possible earlier? The Department of Joining and Coating Technology of the TU Berlin is looking for ways to combine materials via laser which were previously not considered weldable, and is searching for opportunities to coat or repair components. In addition, they research compounds that can be easily separated again. At the University of Applied Sciences Brandenburg research is also being conducted on not yet feasible connections. The Department of Engineering puts emphasis on the welding of very thin wires or wires with very different thicknesses. In addition, they offer introductions and collaborations to other companies. At the Beuth University of Applied Sciences work is done on new techniques for laser materials processing and medical applications. The Fraunhofer-Institute for Production Systems and Design Technology (IPK) is looking for possibilities to work on hard and brittle and other difficult to machine materials, to pattern surfaces, and to produce complex geometries. The Institute for Machine Tools and Factory Management at the TU Berlin is researching laser-welding processes. Also, the Department of Mechanical Engineering at the TU Berlin is active in this field. The University of Applied Sciences (HTW), deals, among other things, with laser applications in the development of thin film solar cells. And the teaching and research focus “Optical Technologies” at the Technical University (FH) in Wildau in Brandenburg even offers, together with FH Brandenburg, a Master's degree in photonics. The Federal Institute for Materials Research and Testing (BAM) is looking for methods with which thickwalled components can be reliably and productively connected via laser and hybrid welding processes. Interesting are, for example, compounds of steels of different grade. 41

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