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Retrofit polarization-maintaining in optical fibers (PM)
The invention of the University of Bonn relates to the development of a method to retrofit polarization- maintaining (PM) optical fibers in a way, that a routinated achievement of polarization to a degree better than 10-5 in extinction ratio takes place.
The invention consists of a glass cell featuring an ultra-low birefringence (around 10–8) with an outstanding optical access due to its compact dodecagonal shape.
Scientists of the Rheinische Friedrich Wilhelms University of Bonn and the Max Planck Gesellschaft developed a modular sensor system for online detection of Triacetontriperoxide (TATP) in gas phase. The detection took place in open air flow.
Dynamic systems often use a two-position controller and a simple sensor that only indicates whether a threshold is exceeded or not.
Antireflective integrated optical waveguide
In transitions between dielectric optical waveguides of different thickness, it comes through modal mismatch usually to radiation losses and optical backscatter.
Due to the steadily increasing number of electrical and electronic devices in motor vehicles, there is an ever-increasing disturbance on the supply lines. In particular the power electronics generate unwanted interference signals.
On-Board PSS Monitoring
The vehicle electrical system has become more and more complex over the years. Thus, the error probability increases, but an accurate fault identification and isolation becomes more and more difficult.
In today's passenger cars, a large number of sensors are installed which monitor the vehicle condition. For example, since 01.11.2014, all new cars have to be fitted with tire pressure sensors according to the EU regulation.
Open FET Sensor
The Open FET sensor is a field-effect-based sensor in which the gate electrode is connected only to the signal to be measured and not as usual to other electronic components.
WiMDaD Wire Mesh Damage Detection
Composite materials are nowadays used in many technical fields. Blades of wind power plants or aircraft parts, for example, are made out of these materials.
Zugeschnitten auf die Anforderungen aus der Praxis wurde am Institut für angewandte Nano- und optische Technologien der Hochschule Niederrhein (iNano), Krefeld, der FoBt Sensor weiter entwickelt.
The vibration sensor works with two optical fiber sensors with Bragg gratings, in combination with a bending beam and a broadband light source.
Lasers as sources for coherent and intense light are used in many high-tech applications and medical devices. Generally, the generation of Laser-light is characterized by a significant level of optical and electrical energy input and low efficiency.
Lock-In amplifiers are firmly anchored in everyday research. They offer excellent noise suppression for repeating signals. The degree of suppression, however, depends critically on the low-pass filter at the end of the signal processing chain.
Window for high temperatures
For the monitoring of highly complex processes in closed reaction vessels, it would often be desirable to be able to observe the process and monitor it by means of optical measuring systems.
Isokinetic aerosol sampling is currently only designed and used in very narrow speed ranges. However, known diffusers are only permanently adjustable and designed for a specific flow velocity.
Synthetic Image Data
Almost all car manufacturers are currently developing camera-based autonomous or semi-autonomous vehicles.
On the trail of plasma
Plasmas are used in a wide range of technical applications, including semiconductor technology. Plasma etching and plasma-induced material deposition are used to remove functional layers in a structured manner or to selectively generate surface hardening, cleaning and activation on the target surface.
The electrical power grid is undergoing a major transformation. Increasing numbers of decentralized feeders have been added in recent years and, in the future, there will be a large number of charging stations for electric vehicles that temporarily draw a large amount of electrical power from the power grid.
The charge-sensitive amplifier is an electronic circuit for amplifying the lowest voltages. It is suitable for the usual applications of an electrometer.