Smart laser system for atom interferometer-based quantum sensors A novel Bragg grating-based frequency reference module complements our latest generation of laser modules. It facilitates accurate frequency control. Autonomous operation of the combined laser system is enabled by a smart industry-grade control platform. FBH research: 22.05.2023
A new route to lattice-matched base layers for UV LEDs – the role of oxygen in high-temperature annealing of AlGaN Improved material quality of aluminum gallium nitride (AlGaN) was achieved by high-temperature annealing using a sapphire (Al2O3) cover to protect the surface. Oxygen helps to maintain optical transparency while decreasing the defect density. FBH research: 08.05.2023
DBR tapered laser at 660 nm as miniaturized pump source for quantum optical coherence tomography The FBH has developed a red-emitting DBR tapered laser at a wavelength of 660 nm. With an almost single-mode emission and more than 1 W optical output power, this laser is suitable to generate entangled photons for quantum-OCT. FBH research: 24.04.2023
A 4 GHz digital class-E outphasing PA for highly efficient 5G base stations FBH has realized the first GaN-based digital class-E outphasing power amplifier module for 5G applications. The design concept is an important step to push efficiency of 5G base stations and to advance digitization for next-generation communication. FBH research: 03.04.2023
Nanofabrication of suspended photonic crystal cavities in diamond We have successfully fabricated a novel type of suspended photonic crystal cavities in diamond by implementing a quasi-isotropic dry etching process in O2-plasma. These devices are key components for next-generation quantum communication technologies. FBH research: 20.03.2023
A unique tool for sputtered iridium gate technology Recently, FBH started operating a new sputter tool based on the principle of a quasi-vertical deposition process. The tool concept ensures a cross-contamination free process and is used to deposit e.g. iridium as a Schottky barrier metal. FBH research: 07.03.2023
Picosecond pulses with 40 W peak power from a tapered laser diode for THz application FBH scientists have developed a monolithic double quantum well laser featuring a tapered gain section for ultrashort pulse generation. The generated picosecond pulses with high peak power can be further compressed and utilized for THz-pulse generation. FBH research: 20.02.2023
Shifted excitation Raman difference spectroscopy identifies soil minerals and predicts soil carbonate content SERDS using 785 nm dual-wavelength diode lasers is a powerful technique for soil inspection under the influence of strong fluorescence interference. This could help to improve crop productivity as well as soil health and to reduce fertilizer usage. FBH research: 06.02.2023
Compact single-stage 90 GHz power amplifier for terahertz applications We have realized a compact power amplifier using our InP MMIC process, achieving a maximum output power of 12.5 dBm with 17% efficiency. The circuit is equipped with low-temperature indium bumps for flip-chip mounting. FBH research: 23.01.2023
New Focused Ion Beam System for Device Characterization and Rapid Prototyping FBH recently installed a Helios 5 UX dual beam system that combines a focused gallium ion beam with a scanning electron microscope. The instrument will be used for microscopic analysis of materials and devices as well as for rapid prototyping of nano-optical components. FBH research: 09.01.2023