Our work deals with a new approach to improve the beam quality of diode lasers, which is still insufficient for many applications. We propose time-multiplexing, where several pulsed laser diode beams are guided onto a common optical path. This allows to superpose the power of the diodes while maintaining the beam parameter product of a single laser diode. Pulsed operation of continuous wave laser diodes was shown to be possible up to pulse enhancement factors often provided that pulse duration is <300 ns. We use a fast digital optical multiplexer built up by a cascade of binary optical switches. For the latter we use a polarization switch (voltage-driven LiNbO/sub 3/-crystal) 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 piezoelectricity. Up to now an optical power of 10.1 W was generated, 13 W are expected with some improvements. With the use of new 8 W laser diodes even the generation of 25 W will be possible.


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    Titel :

    Time-multiplexing of high power laser diodes yields a high brilliance laser beam


    Beteiligte:
    Bammer, F. (Autor:in) / Holzinger, B. (Autor:in)


    Erscheinungsdatum :

    2005-01-01


    Format / Umfang :

    1005220 byte




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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    Bammer, F. / Holzinger, B. / IEEE | British Library Conference Proceedings | 2005


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    Behringer, M. / Philippens, M. / Teich, W. et al. | British Library Conference Proceedings | 2003



    High Power Laser Diodes

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