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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 8,
  • Issue 1,
  • pp. 45-47
  • (2010)

Flat-top laser beam generated by coherent beam combining of Gaussian lasers

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Abstract

We present a flat-top laser beam generation scheme using coherent beam combining of hexagonally arranged Gaussian lasers. To produce a beam with a flat-top profile, we optimize the amplitude and phase of each unit laser using the least-square method. Simulation results show that with 13 unit lasers, a beam with the flatness of less than 1% in the optimizing region can be achieved. The main lobe contains over 95% of the total power. The scheme requires no external beam shaping element and has the potential to be designed for high-power applications.

© 2010 Chinese Optics Letters

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