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Applied Optics

Applied Optics


  • Vol. 26, Iss. 20 — Oct. 15, 1987
  • pp: 4391–4399

Coherent laser addition using binary phase gratings

James R. Leger, Gary J. Swanson, and Wilfrid B. Veldkamp  »View Author Affiliations

Applied Optics, Vol. 26, Issue 20, pp. 4391-4399 (1987)

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Binary phase diffraction gratings are shown to couple light coherently from a laser array into a single on-axis beam. The diffraction grating, designed to split a single beam into a specific number of equal intensity diffraction orders, is placed inside the cavity formed by the laser array and a common output mirror. The grating superimposes the light beams from the lasers in the array and produces a far-field pattern with the same divergence as that of a single laser. Six GaAlAs lasers from an antireflection-coated linear array were combined with a coupling efficiency of 68.4%. The far field of the combined GaAlAs lasers consisted of a single on-axis Gaussian beam.

© 1987 Optical Society of America

Original Manuscript: February 15, 1987
Published: October 15, 1987

James R. Leger, Gary J. Swanson, and Wilfrid B. Veldkamp, "Coherent laser addition using binary phase gratings," Appl. Opt. 26, 4391-4399 (1987)

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