The FBH presents its advanced diode lasers and UV light-emitting diodes at “Laser World of Photonics“ and the associated conference “CLEO Europe“
The Ferdinand-Braun-Institut (FBH) exhibits a selection of current improvements and new developments regarding diode lasers and UV light-emitting diodes (LEDs) at the international trade fair „Laser World of Photonics“ in Munich from June 22 - 25, 2015.
Exhibition module for plant lighting – UV light-emitting diodes stimulate health-promoting secondary metabolites in plants
Photo: FBH / Schurian.com
Based on the in-house available full technology chain, the institute’s tailored diode lasers enable access to a variety of applications. From materials analytics, sensors, and display technology to materials processing – the flexible all-rounders can be perfectly optimized according to specific requirements.
Increasingly, the institute refines its developments up to ready-to-use systems, enabling customers to test FBH developments in their individual application. The institute is also represented at the associated conference “CLEO Europe“ with the short course “High Power and High Brightness Semiconductor Laser Diodes and Applications“, several lectures, and posters.
Module for plant lighting with UV-B LEDs
The FBH develops the LED technology in the UV-B and UV-C spectral range from the chip to the final radiation module. Applications are wide-ranging and include medical diagnostics and fluorescence spectroscopy as well as UV curing and disinfection. A further application field is plant lighting, for which the FBH has developed and manufactured a module enabling irradiation with UV-B light of a specific wavelength.
In this particular case, LEDs emitting at a wavelength around 310 nm are used to stimulate health-promoting secondary metabolites in plants. The optical power can be flexibly adjusted between 0 and 100%. The novel concept was successfully tested in experiments at the Institute of Vegetable and Ornamental Crops (IGZ). An exhibition module is available at the trade fair booth.
Separating signals – dual-wavelength diode laser for Raman spectroscopy
At the fair, the FBH exhibits novel dual-wavelength diode lasers that are suitable for use in miniaturized, portable laser measurement systems for Raman spectroscopy applications. The laser sources alternatingly emit light from only one chip at two different stabilized wavelengths, which are defined by gratings implemented into the semiconductor chip. Wavelength selection is realized by separately addressable sections within the laser.
The innovative diode laser chip is ideally applicable for SERDS (Shifted Excitation Raman Difference Spectroscopy), enabling to measure Raman spectra under real-world conditions even in highly fluorescent environments and when exposed to daylight. Thus, it is possible to separate Raman signals from background interferences. Moreover, SERDS improves the detection limit by one order of magnitude compared to standard Raman spectroscopy.
With these FBH tiny monolithic light sources on chip level, a compact SERDS measurement head that is only as small as a laser pointer was realized for the first time. This device is the basis for a unique miniaturized and versatile SERDS spectroscopy system, enabling in-situ measurements in various security and health relevant fields including biology, medicine, food control, and pharmacy. Applications in absorption spectroscopy and for generating terahertz radiation are also conceivable.
Simple systems integration due to optical fiber connection – FaBriDi
Fiber-coupled demonstrators newly developed at FBH for industrial use aim at integrating laser radiation with high spectral brightness into various systems, thus enabling easier usage. Now, efficient and compact laser sources are at hand emitting in the near-infrared on multi-watt level (CW operation) with a narrow-band spectrum and a stigmatic, nearly Gaussian laser beam which is independent of the optical power level.
Such sources are highly demanded for the pumping of solid-state lasers and frequency doubling. On a footprint of less than 10 cm2, the micro module integrates a 1064 nm distributed Bragg reflector (DBR) tapered laser, a micro-optical assembly designed to maintain brightness and mounted with sub-micrometer precision and temperature-stabilizing components. The module is also equipped with a single-mode fiber output with standard FC/APC connector.
Higher brilliance and output powers for diode lasers and bars
The institute develops highly brilliant diode lasers in a great variety of designs and packages, covering the wavelength range from 630 nm to 1180 nm. Single emitters with a stripe width of 90 µm, for example, reach peak brilliance results with 3.5 W/mm-mrad. The same applies to even smaller stripes delivering 4…5 W/mm-mrad from a 30 µm aperture.
For rapid prototyping applications the FBH has developed DBR ridge waveguide (RW) lasers with 24 individually addressable emitters featuring a wavelength spacing > 0.3 nm and a spectral width < 1 pm. Further activities at the institute aim at constantly improving efficiency, reliability, and output power. FBH bars around 940 nm at temperatures of -70°C (203 K), for example, delivered a world-wide best result of 2 kW peak power per bar at a pulse width of 200 µs. To date, such powers could only be achieved by combining the optical beams from at least four single bars.
Visit us at “Laser World of Photonics“ in hall B3, booth 359.
http://www.fbh-berlin.com/press/download-center - press pictures (all images are copyrighted)
http://bit.ly/1KVXC38 - overview of FBH contributions at CLEO Europe is provided here
Gesine Wiemer | Forschungsverbund Berlin e.V.
Sharpening the X-ray view of the nanocosm
23.03.2018 | Changchun Institute of Optics, Fine Mechanics and Physics
Drug or duplicate?
23.03.2018 | Fraunhofer-Institut für Angewandte Festkörperphysik IAF
Satellites in near-Earth orbit are at risk due to the steady increase in space debris. But their mission in the areas of telecommunications, navigation or weather forecasts is essential for society. Fraunhofer FHR therefore develops radar-based systems which allow the detection, tracking and cataloging of even the smallest particles of debris. Satellite operators who have access to our data are in a better position to plan evasive maneuvers and prevent destructive collisions. From April, 25-29 2018, Fraunhofer FHR and its partners will exhibit the complementary radar systems TIRA and GESTRA as well as the latest radar techniques for space observation across three stands at the ILA Berlin.
The "traffic situation" in space is very tense: the Earth is currently being orbited not only by countless satellites but also by a large volume of space...
An international team of researchers has discovered a new anti-cancer protein. The protein, called LHPP, prevents the uncontrolled proliferation of cancer cells in the liver. The researchers led by Prof. Michael N. Hall from the Biozentrum, University of Basel, report in “Nature” that LHPP can also serve as a biomarker for the diagnosis and prognosis of liver cancer.
The incidence of liver cancer, also known as hepatocellular carcinoma, is steadily increasing. In the last twenty years, the number of cases has almost doubled...
In just a few weeks from now, the Chinese space station Tiangong-1 will re-enter the Earth's atmosphere where it will to a large extent burn up. It is possible that some debris will reach the Earth's surface. Tiangong-1 is orbiting the Earth uncontrolled at a speed of approx. 29,000 km/h.Currently the prognosis relating to the time of impact currently lies within a window of several days. The scientists at Fraunhofer FHR have already been monitoring Tiangong-1 for a number of weeks with their TIRA system, one of the most powerful space observation radars in the world, with a view to supporting the German Space Situational Awareness Center and the ESA with their re-entry forecasts.
Following the loss of radio contact with Tiangong-1 in 2016 and due to the low orbital height, it is now inevitable that the Chinese space station will...
Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, provider of research and development services for OLED lighting solutions, announces the founding of the “OLED Licht Forum” and presents latest OLED design and lighting solutions during light+building, from March 18th – 23rd, 2018 in Frankfurt a.M./Germany, at booth no. F91 in Hall 4.0.
They are united in their passion for OLED (organic light emitting diodes) lighting with all of its unique facets and application possibilities. Thus experts in...
A new scenario seeking to explain how Mars' putative oceans came and went over the last 4 billion years implies that the oceans formed several hundred million...
23.03.2018 | Event News
19.03.2018 | Event News
16.03.2018 | Event News
23.03.2018 | Materials Sciences
23.03.2018 | Agricultural and Forestry Science
23.03.2018 | Physics and Astronomy