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Proceedings Paper

Methods for improving the beam quality of high-power diode lasers
Author(s): Volker Raab; Martin Ostermeyer; Ralf Menzel
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Paper Abstract

Current commercially available diode lasers with output powers above a few watts lack beam quality, i.e. the ability to be precisely focused. Recent advances in coherent coupling 1,2 of such lasers open view to a new generation of high power, high beam quality, low cost lasers suitable for a wide range of technical applications such as microshaping or cutting. Therefore, we couple bars of 25 diode lasers with total output powers of 25-40 Watts and specially coated lowreflection front facets. Mutual coherence is achieved in external resonators as opposed to the internal resonator absent in our case. Additional elements like mode stops can improve beam quality. Here we present results on the coupling of gain-guided broad-area diode lasers in external resonators, both of single emitters and bars of 25 emitters. Also numerical simulations concerning the mutual coherence of the single emitters have been performed.

Paper Details

Date Published: 20 September 1999
PDF: 3 pages
Proc. SPIE 3822, Computer-Controlled Microshaping, (20 September 1999); doi: 10.1117/12.364221
Show Author Affiliations
Volker Raab, Univ. of Potsdam (Germany)
Martin Ostermeyer, Univ. of Potsdam (Germany)
Ralf Menzel, Univ. of Potsdam (Germany)


Published in SPIE Proceedings Vol. 3822:
Computer-Controlled Microshaping

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