Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Comprehensive know-how and the full value chain, from technology development to complete systems

16.06.2015

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


SERDS optode with innovative dual-wavelength diode laser – enables separating Raman signals from background interferences and improves the detection limit by one order of magnitude

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.

Weitere Informationen:

http://www.fbh-berlin.de
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.

More articles from Physics and Astronomy:

nachricht NASA detects solar flare pulses at Sun and Earth
17.11.2017 | NASA/Goddard Space Flight Center

nachricht Pluto's hydrocarbon haze keeps dwarf planet colder than expected
16.11.2017 | University of California - Santa Cruz

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: A “cosmic snake” reveals the structure of remote galaxies

The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.

Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...

Im Focus: Visual intelligence is not the same as IQ

Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.

That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...

Im Focus: Novel Nano-CT device creates high-resolution 3D-X-rays of tiny velvet worm legs

Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.

During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....

Im Focus: Researchers Develop Data Bus for Quantum Computer

The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.

Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...

Im Focus: Wrinkles give heat a jolt in pillared graphene

Rice University researchers test 3-D carbon nanostructures' thermal transport abilities

Pillared graphene would transfer heat better if the theoretical material had a few asymmetric junctions that caused wrinkles, according to Rice University...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Ecology Across Borders: International conference brings together 1,500 ecologists

15.11.2017 | Event News

Road into laboratory: Users discuss biaxial fatigue-testing for car and truck wheel

15.11.2017 | Event News

#Berlin5GWeek: The right network for Industry 4.0

30.10.2017 | Event News

 
Latest News

NASA detects solar flare pulses at Sun and Earth

17.11.2017 | Physics and Astronomy

NIST scientists discover how to switch liver cancer cell growth from 2-D to 3-D structures

17.11.2017 | Health and Medicine

The importance of biodiversity in forests could increase due to climate change

17.11.2017 | Studies and Analyses

VideoLinks
B2B-VideoLinks
More VideoLinks >>>