A compact high brilliance diode laser

F. Bammer; B. Holzinger

doi:10.1117/12.640416

15 February 2006 A compact high brilliance diode laser

F. Bammer, B. Holzinger

Proceedings Volume 6104, High-Power Diode Laser Technology and Applications IV; 61040P (2006) https://doi.org/10.1117/12.640416
Event: Lasers and Applications in Science and Engineering, 2006, San Jose, California, United States

Abstract

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.

Citation Download Citation

F. Bammer and B. Holzinger "A compact high brilliance diode laser", Proc. SPIE 6104, High-Power Diode Laser Technology and Applications IV, 61040P (15 February 2006); https://doi.org/10.1117/12.640416

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