Applied Physics A

, Volume 107, Issue 2, pp 371–377 | Cite as

Spectroscopic analysis of packaging concepts for high-power diode laser bars

  • Martin Hempel
  • Mathias Ziegler
  • Sandy Schwirzke-Schaaf
  • Jens W. Tomm
  • Denny Jankowski
  • Dominic Schröder


Double-side cooled high-power diode laser bars packaged by different techniques on different types of passive heat sinks are analyzed in terms of packaging-induced strain. Reference data from standard devices being single-side cooled only and packaged by conventional soft and hard soldering are also presented. Thermal profiling across the devices complements the results. The most suitable packaging architecture and technique for double-side cooled bars is identified. Measurements of the laser emission near field and electroluminescence pattern provide direct reference to the functionality of the devices. Furthermore, a type of cross calibration of the methods used for strain analysis is made, since all techniques are applied to the same set of bars. This involves micro photoluminescence, micro Raman, and degree-of-polarization electroluminescence spectroscopy.


GaAs Heat Sink GaAs Substrate Heat Spreader Emitter Temperature 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



Technical assistance of Monika Tischer and Michael Winterfeld is acknowledged.


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Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  • Martin Hempel
    • 1
  • Mathias Ziegler
    • 2
  • Sandy Schwirzke-Schaaf
    • 1
  • Jens W. Tomm
    • 1
  • Denny Jankowski
    • 3
  • Dominic Schröder
    • 3
  1. 1.Max-Born-InstitutBerlinGermany
  2. 2.Fachgruppe VIII.4Bundesanstalt für Materialforschung und -prüfungBerlinGermany
  3. 3.JENOPTIK Laser GmbHJenaGermany

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