Our range of services

Optomechanically and thermo-mechanically stable laser systems are required wherever classic construction technology reaches its limits. Many applications need such particularly robust systems, which must function reliably under extreme environmental conditions, for example. Mounting processes based on soldering technology for optical and optomechanical components allow the construction of systems suitable for aerospace applications. With its »Future Laser System« (FULAS), Fraunhofer ILT has developed a corresponding technology platform for future satellite-based LIDAR systems. On the basis of this platform, laser systems that detect trace gases in the atmosphere can be designed and constructed specific to a required task. In addition to space applications, the soldering technology can also be used advantageously for classical industrial and research applications, where – in addition to the stability – a low outgassing rate, a favorable aging behavior or good heat conduction of the mounting interface are required. The assembly technology is based on the flexible Pick & Align process developed at Fraunhofer ILT, in which all essential adjustment steps are performed with manually guided robots. In addition to new concepts, the simplification of already existing soldering processes and packages will be promoted.

The range of services encompasses feasibility studies, the development of assembly processes or functional assemblies and their qualification as well as consultancy in the conceptual design of processes and plants.

Reflow gelötetes Optikmodul.
© Fraunhofer ILT, Aachen, Germany.
Reflow gelötetes Optikmodul.
Gelötete Optiken eines Faraday-Isolators.
© Fraunhofer ILT, Aachen, Germany.
Gelötete Optiken eines Faraday-Isolators.
Designed using new soldering techniques: an optical parametric oscillator (OPO) for the MERLIN-LIDAR system.
© Fraunhofer ILT, Aachen, Germany.
Designed using new soldering techniques: an optical parametric oscillator (OPO) for the MERLIN-LIDAR system.


  • Concept development for the assembly of laser systems and optical systems
  • Simulation analysis (thermal, mechanical, optical, electrical)

Assembly processes

  • Thin film processes for solder layer generation (PVD)
  • Pick & Align - active alignment of optical components
  • Reflow soldering processes
  • Active soldering processes
  • Gripper development
  • Planar assembly methods

Component assembly

  • Laser crystals
  • Nonlinear Crystals
  • Mirrors and lenses
  • Fiber components
  • Soldering of optomechanical assemblies
  • Construction of hybrid assemblies up to complex prototypes

Quality inspection/Qualification

  • Temperature cycle tests incl. autocollimator measurement
  • Vibration and shock tests incl. autocollimator measurement
  • Modal analysis
  • Shear test
  • Tensile test
  • Metallurgical investigations
  • EDX and scanning electron microscopy
  • Measurement of stress birefringence


Our brochures offer a quick view onto our service portfolio. Find more detailed information in the “project results“ tab.




Laser technology can solve demanding tasks in many different industries. Whether as a tool in automotive production, as measuring equipment in the environmental sector, as a diagnostic or therapeutic instrument in medical technology or as a communication medium in space technology, the laser provides multiple uses with high productivity and high efficiency.

Read up about the innovations of the Fraunhofer ILT in a few selected industries and convince yourself!


Research with us!

Please do not hesitate to contact us if you have any questions about general topics! Our contact persons are happy to get in touch with you.


Esser, D., Giesberts, M., Erben, B., Nyga, S., Kasemann, R., Wührer, C., Hahn, S., Leyendecker, M., Eßer, J., Wirz, W., Klein, S., Traub, M., Klein, J., Brandenburg, W., Luttmann, K., Mohr, D., Pérez Prieto, L., Hoffmann, H.-D,
Optomechanical design of a 150 mJ single frequency UV laser for the AEOLUS-2 mission.
International Conference on Space Optics — ICSO 2022, 3-7 October 2022, Dubrovnik, Croatia. Proceedings Volume 12777, International Conference on Space Optics — ICSO 2022; 127770N (2023).

Livrozet, M., Gronloh, B., Faidel, H., Luttmann, J., Hoffmann, D.:
Optical and Optomechanical Design of the MERLIN Laser Optical Bench.
International Conference on Space Optics — ICSO 2021| 30 March - 2 April 2021 | Online Only. Proceedings Volume 11852, International Conference on Space Optics — ICSO 2020; 118522Q- (14 S.) (2021)

Holters, M., Dirks, S., Stollenwerk, J., Loosen, P.:
Automated and model-based assembly of an anamorphic telescope.
SPIE OPTO, 22 February 2018, San Francisco, California, United States.
Proc. SPIE 10538, Optical Interconnects XVIII, 105380U (10 S.) (2018)

Löhring, J., Winzen, M., Faidel, H., Miesner, J., Plum, D., Klein, J., Fitzau, O., Giesberts, M.,
Brandenburg, W., Seidel, A., Schwanen, N., Riesters, D., Hengesbach, S., Hoffmann, H.-D.:
Key optical components for spaceborne lasers
Proc. SPIE 9730, 97300O-1 (11 S.) (2016)

Livrozet, M. J., Elsen, F., Wüppen, J., Löhring, J., Büdenbender, C., Fix, A., Jungbluth, B., Hoffmann, D.:
Feasibility and performance study for a space-borne 1645 nm OPO for French-German satellite mission MERLIN
Proc. SPIE 8959, 89590G (7 S.) (2014)

Brecher, C., Schmitt, R., Loosen, P., Guerrero, V., Pyschny, N., Pavim, A., Gatej, A.:
Self-optimizing approach for automated laser resonator alignment 
Opt. Lasers Eng. 50, 287-292, (2012)

Faidel, H., Gronloh, B., Winzen, M., Liermann, E., Esser, D., Morasch, V., Luttmann, J., Leers, M., Hoffmann, D.:
Passive alignment and soldering technique for optical components 
Proc. SPIE 8235, (10 S.) (2012)

Gatej, A., Pyschny, N., Loosen, P., Brecher, C.:
Robot-based Resistance Soldering of Optical Components
Soldering & Surface Mount Technology Vol. 24, no. 2, pp. 112-119, (2012)

Leers, M., Winzen, M., Liermann, E., Faidel, H., Westphalen, T., Miesner, J., Luttmann, J., Hoffmann, D.:
Highly precise and robust packaging of optical components
Proc. SPIE 8244, (6 S.) (2012)

Leers, M., Winzen, M., Liermann, E., Faidel, H., Westphalen, T., Miesner, J., Luttmann, J., Hoffmann, D.:
Pick and align - high precision active alignment of optical components
IEEE Electronic Components & Technology Conference, San Diego,pp. 208-212 (2012)

Funck, M. C., Dolkemeyer, J., Morasch, V., Loosen, P.:
Design of a miniaturized solid state laser for automated assembly
Proc. SPIE 7721, 77210X, (10 S.) (2010)

Funck, M. C., Loosen, P.:
The effect of selective assembly on tolerance desensitization
Proc. SPIE 7652, 76521M, (9 S.) (2010)

Leers, M., Westphalen, T., Liermann, E.:
Both sides cooled packages for high-power diode laser bars
60th Electronic Components and Technology Conference (ECTC), Las Vegas, IEEE, pp. 708-712, (2010)

Leers, M., Liermann, E., Imgrund, P., Kramer, L., Volkert, J.:
Expansion matched heat sinks made by μ-metal injection molding
Proc. SPIE 7583, 75830H, (11 S.) (2010)

Miesner, J., Timmermann, A., Meinschien, J., Neumann, B., Wright, S., Tekin, T., Schröder, H., Westphalen, T., Frischkorn, F.:
Automated assembly of Fast Axis Collimation (FAC) lenses for diode laser bar modules
Proc. SPIE7198, 71980G, (10 S.) (2009)

Leers, M., Westphalen, T., Pathak, R., Scholz, C.:
Investigation of n-side cooling in regards to bar geometry and packaging style of diode laser
Proc. SPIE 7198, 71980H, (9 S.) (2009)

Schmidt, H., Rota, A. C., Imgrund, P., Leers, M.:
Micro metal injection moulding for thermal management applications using ultrafine powders
Powder Injection Moulding Int. 3, Nr. 2, 55-59, (2009)

Westphalen, T., Leers, M., Werner, M., Traub, M., Hoffmann, H.-D., Ostendorf, R.:
Packaging influence on laser bars of different dimensions
Proc. SPIE 7198, 71980K, (8 S.) (2009)

Brecher, C., Pyschny, N., Loosen, P., Funck, M., Morasch, V., Schmitt, R., Pavim, A.:
Self-optimising flexible assembly systems
Self-x in Engineering. Benjamin Klöpper, Wilhelm Dangelmaier (Eds.)
Münster: MV-Wissenschaft, pp. 23-38, (2009)


Our services cover a wide range of topics. Related topics to packaging and further research and development focuses can be found under the following links.