Vorträge und Posterpräsentationen (mit Tagungsband-Eintrag):
F. Bammer, B. Holzinger:
"A compact high brilliance diode laser";
Vortrag: Photonics West 2006,
San Jose, Kalifornien, USA;
- 26.01.2006; in: "Proceedings of SPIE, High-Power Diode Laser Technology and Applications IV",
We explain some technical details regarding time-multiplexing of laser diodes, a method to improve the beam quality of diode lasers, which is still insufficient for many applications. Several pulsed laser diode beams are guided onto a common optical path to superpose the power of the laser diodes while maintaining the beam parameter product of a single laser diode. Pulsed operation of continuous wave laser diodes with average power equal to the specified cw-power of 4 W was tested for 150 hours without failure. We use a fast digital optical multiplexer built up by a cascade of binary optical switches. For the latter we use a Pockel´s cell followed by a polarization filter, which allows addressing of two optical paths. Instead of direct on/off-switching we drive the crystals with a harmonic voltage course to avoid ringing caused by piezo-electricity. Up to now an optical power of 10.5 W was generated, 13 W are expected with some improvements. Furthermore we discuss the use of new 8 W laser diodes and the involved implications on driver technology.
Erstellt aus der Publikationsdatenbank der Technischen Universität Wien.