Custom Diode Lasers And UV LEDs - From The Chip To The Operational System

At Photonics West 2019, FBH will present its new developments and developments in diode lasers. The flexible and compact light sources are used in areas such as LiDAR, medicine and (Raman) spectroscopy. Results and advances in UV LEDs are presented by the FBH together with the spin-off UVphotonics.

The Ferdinand Braun Institute, Leibniz Institute for High Frequency Technology (FBH) will be presenting new and further developments of its diode lasers and UV light emitting diodes (LEDs) at the Photonics West 2019 in San Francisco (USA) from 5 to 7 February 2019. At the German Pavilion, the institute will showcase its entire range of services, from design and chips to modules and system prototypes. Also at the accompanying conferences (2 to 7 February) the FBH is visibly represented with 20 scientific contributions. One of FBH's R & D priorities is high-power diode lasers, which are used for direct material processing and as pump sources. In his plenary lecture, FBH Director Günther Tränkle gives an overview of current design improvements that increase efficiency, peak performance, On the exhibition stand, the FBH shows among others the following exhibits:

Self-sufficient, PC-controllable pulsed laser sources
The FBH offers flexible laser sources that deliver pulses in the range of 200 ps to 20 ns - the associated systems can be equipped flexibly with diode lasers of other wavelengths and power ranges. Among other things, wavelength-stabilized laser diodes have been developed for LiDAR systems in the automotive sector, emitting 5 ns pulses with 40 W pulse power around 905 nm with good beam quality and up to 85 ° C. 3-emitter laser chips, whose emission can be easily combined with optics to a single point, deliver up to 100 W. These chips can be supplied with FBH drivers or as a self-sufficient, computer-controlled laser source.

Another versatile, sophisticated system is the efficient all-in-one pulsed laser system PLS. It combines proprietary optical and electronic semiconductor devices to deliver ultra-short 5 to 15 ps light pulses. The system provides any desired repetition rate from the Hertz to the MHz range; the pulse peak power is> 20 W.

Miniaturized fiber-coupled diode laser sources for biomedical and spectroscopic applications
The FBH has developed compact laser modules for the yellow spectral range from 532 nm to 590 nm, which provide output power in the watt range. They are based on a single, only 76 x 54 x 15 mm^³ housing, with each solution tailored to the specific application. The modules are available in both CW and pulsed mode for photocoagulation in ophthalmology or for use in fluorescence spectroscopy or STED microscopy. The laser modules presented here consist of a fully semiconductor-based master oscillator power amplifier (MOPA) combined with frequency doubled (PPLN) crystals; Optionally, they can be supplied with polarization-preserving fiber exit.

Portable Shifted Excitation Raman Difference Spectroscopy (SERDS) - from the chip to the application
For fast SERDS measurements, the FBH demonstrated monolithic two-wavelength diode lasers that alternately emit light at two slightly different wavelengths around 785 nm and around 671 nm. The y-shaped DBR diode lasers provide two-wavelength laser emission and wavelength tuning over several nanometers - simply by changing the heating current with electrically controlled micro heaters implemented above the grids. Thus, a quick changeover operation between the two laser emission lines is possible, which can reduce examination times to a few milliseconds. If the systems are supplemented with battery, electronic measuring instruments and a software interface, they can be used for on-site measurements. Self-developed, portable systems have already been successful in measurements on food,

Visit us at Photonics West 2019, German Pavilion, Booth 4545-49 (FBH) and 4545-50 (UVphotonics). An overview of the 20 FBH contributions to the accompanying conferences can be found here: www.fbh-berlin.com/news-dates/dates/detail/fbh-at-photonics-west-2019.

You will find the appropriate press photos for all described diode lasers and modules here for download . Alternatively, you can choose motifs from our picture service: http://www.fbh-berlin.de/presse/bilderservice.