The Ferdinand-Braun-Institut (FBH) researches electronic and optical components, modules and systems based on III-V compound semiconductors. These devices are key enablers that address the needs of today’s society in fields like communications, energy, health, and mobility. In its optoelectronic field of expertise, FBH develops light sources from the near-infrared to the ultra-violet spectral range: high-power diode lasers with excellent beam quality, UV light sources, and hybrid laser modules. Applications range from medical technology, high-precision metrology and sensors to optical communications in space and integrated quantum technology. The FBH covers the full range of capabilities, from design through fabrication to device characterization. The institute offers its international customer base tailored solutions and know-how as a one-stop agency – from design to ready-to-use modules and prototypes.
FBH presents its full range of capabilities in diode lasers and UV LEDs, each device optimized to fit the respective application. The institute develops customized light sources from the NIR to the ultra-violet spectral range: high-power diode lasers with excellent beam quality, UV light sources, and hybrid laser modules. FBH competencies include:
The FBH has developed a compact laser system (76 x 54 x 15 mm³) that combines two laser beams almost loss free with > 12 W output power in cw mode. The wavelength at 980 nm can be precisely tuned in a range of > 2 nm to meet the exact absorption characteristics of the pumped medium. High beam quality of the single emitters is maintained, achieving an output beam quality factor of M² < 1.5 (vertical and lateral). The concept is easily adaptable to tapered laser diodes of different wavelengths.
Based on FBH’s dual-wavelength Y-branch DBR-RW lasers, the turnkey system is a fully operational light source with integrated temperature control and five individual current sources. It is programmable using an USB interface. The system offers fast alternating operation between both laser lines for SERDS to extract Raman signals efficiently from disturbing backgrounds. The spectral distance between the two SERDS wavelengths can be electrically adjusted using implemented on-chip micro-heaters.
FBH’s high pulse power laser source with a 48-emitter diode laser bar is ideally suited for 3D object detection, e.g., for line scanners in automotive LiDAR. It delivers 4-10 ns long optical pulses with >600 W pulse peak power at 905 nm wavelength. The DBR-stabilized laser emission has a width of 0.5 nm and >30 dB side mode suppression. The bar is electrically driven by a new in-house developed high-speed GaN driver providing current pulses of up to 800 A with 100 kHz repetition frequency.