Product category:
Lasers
News Release from: Osram Opto Semiconductors | Subject: Laser bars
Edited by the Electronicstalk Editorial
Team on 20 March 2008
Lasers raise the bar on efficiency
Osram Opto Semiconductors has improved the performance parameters of its laser chips, optimising the overall product for premium performance.
As part of its Brilasi research project, Osram Opto Semiconductors has improved the performance parameters of laser bars (laser chips) - their efficiency, output power, lifetime and beam quality - optimising the overall product for premium performance The results include laser chips with a wavelength of 910 to 980nm that achieve an optical output of 120W under real-world conditions and a typical efficiency of 70%
This article was originally published on Electronicstalk on 22 Nov 2007 at 8.00am (UK)
Related stories
Super-bright LED keeps its cool
The exceptionally low thermal resistance of the Diamond Dragon's SMT package allows heat produced in the chip to be efficiently removed from the LED.
OLED tile promises lighting efficiency
OLED prototype has achieved a luminous efficiency of more than 20 lumen/W at a brightness of 1000cd/m.
"With this latest generation of laser bars we will be able to offer much more powerful components", said Ellen Sizemore, Director, LED/IR Marketing Osram Opto Semiconductors.
All manufacturers of diode lasers can benefit because Osram has been long established as an independent supplier of laser chips and laser bars.
The semiconductor specialist will launch this high-performance initiative with laser bars that have a 50% fill factor.
Further reading
Sensors add options to mobile devices
Osram Opto Semiconductors' SFH7740 and SFH7741 SMT proximity sensors allow the automatic shut-off of displays and keypads, improving the efficiency of products such as mobile phones.
High brightness on surface mount LEDs.
Agilent Technologies has introduced a series of surface-mount LEDs designed and qualified specifically for automobile interior and exterior lighting applications.
High-output blue LED has power to replace arrays
New from AP Technologies is the OD-470 high-output blue LED with a typical emission wavelength of 470nm and output power of 30mW DC.
(The fill factor of a bar defines the ratio of active width to overall width).
The main applications for these laser bars include pumping of solid-state lasers and direct material processing.
In addition to laser bars with a wavelength of 910 to 980nm that achieve an efficiency of 70% at 120W, Osram will produce laser bars with wavelengths of 808 and 880nm which will deliver an efficiency of 62% at 120W.
Structures with a fill factor of 20% that are ideal for optical fibre coupling applications complete the range of new more powerful components.
Osram initially expects to produce 20% fill factor laser bars in the 910 to 980nm wavelength range with a recommended output of 80 W.
With the new, more powerful laser bars, system output can be increased and still deliver the same lifetime.
Additionally, systems can be made smaller and more reliable, without compromising output.
Samples of the new unmounted laser bars are currently available.
The product launch for standard industrial laser bars with a 50% fill factor is planned for summer 2008; structures for optical fibre coupling applications will be launched in autumn 2008.
The Brilasi research project (brilliant high-power laser diodes for industrial applications, FKZ 13N8601) was initiated by the Germany Ministry for Education and Research and executed by the VDI (Association of German Engineers); Osram served as the project co-ordinator.
The project team was comprised of various partners from the laser system and end user sectors, as well as representatives from research institutes.
The aim of the project was to develop highly efficient and reliable diode lasers for industrial applications.
Osram has achieved the objective of this research project with laser bars that can be used at 100 to 170W in a 20,000 hour continuous wave (CW) or long-pulse mode - depending on the emission wavelength and mounting technology.
The key to this success was the optimisation of the epitaxial structures, particularly with regard to reducing electrical losses to a minimum.
Researchers found that it was possible to reduce the electrical series resistances without increasing the optical absorption losses, while at the same time improving the laser resonator.
• Osram Opto Semiconductors: contact details and other news
• Email this article to a colleague
• Register for the free Electronicstalk email newsletter
• Electronicstalk Home Page
Search the Pro-Talk network of sites
