Within its photonics research area, FBH covers a broad range of diode laser and light-emitting diodes (LED) developments that are tailored precisely to fit individual requirements. The portfolio ranges from basic research to the development of ready-to-use modules and prototypes. It comprises gallium arsenide based diode lasers, emitting from the infrared to the UV spectral range, as well as laser diodes and LEDs based on gallium nitride with emission in the UV spectral range. The FBH currently focuses on the following topics:
- High-power diode lasers – broad area lasers, laser bars, and stacks, optimized for high output powers. They are used as pump lasers as well as for direct materials processing.
- Laser modules – optics for beam shaping, external resonators, electronics, and crystals for frequency doubling are integrated with diode lasers into miniaturized modules. Subsequent coupling into glass fibers is also possible. These light sources are ideally suited for applications including displays and medical technology.
- Laser sensors – diode lasers that are customized for applications in sensors and analytics. They are employed, e.g., in miniaturized, portable laser measurement systems that enable Raman spectra to be measured even in highly fluorescent environments.
- Laser metrology – ultra-narrowband diode laser modules are developed in this field. Due to high-precision mounting they are particularly compact as well as robust and thus perfectly suited for space applications. This know-how forms the basis for the new research area Integrated Quantum Technology, which is being established since 2019.
- GaN optoelectronics – FBH develops nitride laser diodes and UV LED especially for the UV-B and UV-C spectral range. Suitable applications for LEDs include surface treatment and plant growth lighting.
The required basic know-how for these developments is provided by the Optoelectronics Department. It designs, realizes, and characterizes the corresponding diode laser chips.