Journal
APPLIED PHYSICS LETTERS
Volume 93, Issue 21, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3036896
Keywords
Bragg gratings; finite difference methods; laser cavity resonators; semiconductor laser arrays; Talbot effect
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Funding
- European project BRIGHTER.EU [FP6-IST-035266]
- French Ministry of Defense (Delegation Generale de l'Armement)
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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.
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