Zobrazeno 1 - 10
of 75
pro vyhledávání: '"Alfred Lell"'
Autor:
Tero Pilvi, Nusret Sena Güldal, Manfred Römer, Riina Ritasalo, Peer Löbmann, Florian Peskoller, Alfred Lell, Gerhard Domann, Gertrud Kräuter, Angela Eberhardt
Publikováno v:
Journal of Sol-Gel Science and Technology. 97:458-465
Sol–gel formulations were applied to replace silicone as matrix material for phosphors in pc-LEDs. The content of organic groups was minimized in order to reduce yellowing during the operation of the elements. It was possible to evenly embed YAG:Ce
Autor:
Bernhard Stojetz, Jens W. Tomm, Alfred Lell, Muhammad Ali, Robert Kernke, Felix Mahler, Harald König
Publikováno v:
IEEE Journal of Selected Topics in Quantum Electronics. 25:1-6
We present an analysis of optical and thermal properties of GaN-based blue-emitting high-power diode laser arrays (bars). Parameters such as emission power and temperature are monitored for each single emitter of arrays consisting of 23 emitters. The
Autor:
Harald König, Muhammad Ali, Urs Heine, Christoph Eichler, Alfred Lell, Markus Baumann, Sven Gerhard, Christoph Walter, Volker Krause, Martin Behringer, Anne Balck, Markus Keidler, Georg Brüderl, Matthias Peter, Soenke Tautz, Tobias Haupeltshofer
Publikováno v:
High-Power Diode Laser Technology XVIII.
Blue high-power semiconductor lasers have increased greatly in performance over the recent decade enabling new application fields from high brightness projection up to materials processing beyond 1000W output power systems. Base for best system perfo
Autor:
Muhammad Ali, Georg Rossbach, Jelena Ristic, Bernhard Stojetz, Volker Krause, Lars Naehle, Matthias Peter, Markus Baumann, Georg Brüderl, Alfred Lell, Soenke Tautz, Uwe Strauss, Werner Bergbauer, John Brückner, Teresa Wurm, Anne Balck, Harald König, Urs Heine, Christoph Eichler, Sven Gerhard, André Somers, Jan Wagner
Publikováno v:
Novel In-Plane Semiconductor Lasers XVIII.
More and more applications are using GaN laser diodes. Visible blue laser devices are well established light sources for converter based business projection of several thousand Lumens. Additional laser-based concepts like near-to-eye projection push
Autor:
Michael Stoiber, Simon Drovs, Florian Harth, Bernhard Stojetz, Uwe Strauss, Bernd Köhler, Harald König, Muhammad Ali, Heiko Kissel, Tobias Könning, Alfred Lell, Jens Biesenbach, Philipp König
Publikováno v:
High-Power Diode Laser Technology XVII.
With the advent of high power blue laser diodes in general and blue laser bars in particular new applications are emerging, utilizing this new technology. Possibly the biggest benefits compared to traditional high power diode laser wavelengths in the
Autor:
Ulrich Witte, Bernhard Stojetz, Anne Balck, Volker Krause, Sörn Ocylok, Harald König, Arnd Kösters, Markus Baumann, Charley Bachert, Muhammad Ali, Jörg Malchus, Rony Vincent Chacko, Uwe Strauss, Deepak Dinakaran, Alfred Lell, Sören Marfels, Matthias Weinbach
Publikováno v:
High-Power Diode Laser Technology XVII.
The availability of high-power blue diode-lasers established a new class of laser sources for materials processing recently. With the significantly shorter wavelength compared to conventional laser sources for materials processing new applications ar
Publikováno v:
Novel In-Plane Semiconductor Lasers XVIII.
Except for their primary emission, diode lasers frequently show emissions at lower photon energies. We present a study in which we record and analyze emission images of (In,Ga,Al)N-based 450 nm emitting diode lasers. Imaging is realized in the spectr
Autor:
Bernhard Stojetz, Uwe Strauß, Michael Stoiber, Harald König, Jens Biesenbach, Bernd Köhler, Andreas Löffler, Simon Drovs, Tobias Könning, Alfred Lell, Heiko Kissel, Sascha Dürsch
Publikováno v:
High-Power Diode Laser Technology XVI.
In this paper we report on further development of fiber coupled high-power diode lasers in the visible spectral range. New visible laser modules presented in this paper include the use of multi single emitter arrays @ 450 nm leading to a 120 W fiber
Autor:
Rony V. Chacko, Andreas Löffler, Uwe Strauss, Bernhard Stojetz, Harald König, Alfred Lell, Volker Krause, Arnd Kösters, Charley Bachert, Matthias Weinbach, Sörn Ocylok, Deepak Dinakaran, Ulrich Witte, Sören Marfels, Jörg Malchus, Markus Baumann, Anne Balck
Publikováno v:
High-Power Diode Laser Technology XVI.
Autor:
M. Baumann, Christoph Eichler, V. Krause, Harald König, J. Malchus, Uwe Strauss, Andreas Löffler, Bernhard Stojetz, Matthias Peter, Alfred Lell, Muhammad Ali, A. Balck
Publikováno v:
High-Power Diode Laser Technology XVI.
Industrial material processing like cutting or welding of metals is rather energy efficient using direct diode or diode pumped solid state lasers. However, many applications cannot be addressed by established infrared laser technology due to fundamen