Narrow-line coherently combined tapered laser diodes in a Talbot external cavity with a volume Bragg grating

David Paboeuf, Gaëlle Lucas-Leclin, Patrick Georges, Nicolas Michel, Michel Krakowski, Jun Lim, Slawomir Sujecki, Eric Larkins

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We present the phase locking of an array of index-guided tapered laser diodes. An external cavity based on the self-imaging Talbot effect has been built. A volume Bragg grating is used as the output coupler to stabilize and narrow the spectrum at 976 nm. A power of 1.7 W is achieved in the in-phase single main lobe mode with a high visibility. We have checked that each emitter is locked to the Bragg wavelength with a 100 pm spectrum linewidth. The experimental results compare well with numerical simulations performed with two-dimensional wide-angle finite difference beam propagation method.
Original languageEnglish
Article number211102
Number of pages3
JournalApplied Physics Letters
Issue number21
Early online date25 Nov 2008
Publication statusPublished - 2008


  • Bragg grating
  • finite difference method
  • laser cavity resonators
  • semiconductor laser arrays

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