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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 37, Iss. 18 — Sep. 15, 2012
  • pp: 3741–3743

Two-dimensional diffractive coherent combining of 15 fiber amplifiers into a 600 W beam

Peter A. Thielen, James G. Ho, David A. Burchman, Gregory D. Goodno, Joshua E. Rothenberg, Michael G. Wickham, Angel Flores, Chunte A. Lu, Benjamin Pulford, Craig Robin, Anthony D. Sanchez, D. Hult, and K. B. Rowland  »View Author Affiliations


Optics Letters, Vol. 37, Issue 18, pp. 3741-3743 (2012)
http://dx.doi.org/10.1364/OL.37.003741


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Abstract

We demonstrate coherent beam combining using a two-dimensionally patterned diffractive optic combining element. Fifteen Yb-doped fiber amplifier beams arranged in a 3×5 array were combined into a single 600 W, M2=1.1 output beam with 68% combining efficiency. Combining losses under thermally stable conditions at 485 W were found to be dominated by spatial mode-mismatch between the free space input beams, in quantitative agreement with calculations using the measured amplitude and phase profiles of the input beams.

© 2012 Optical Society of America

OCIS Codes
(050.1970) Diffraction and gratings : Diffractive optics
(140.3290) Lasers and laser optics : Laser arrays
(140.3298) Lasers and laser optics : Laser beam combining

ToC Category:
Diffraction and Gratings

History
Original Manuscript: May 24, 2012
Revised Manuscript: July 14, 2012
Manuscript Accepted: July 28, 2012
Published: September 5, 2012

Citation
Peter A. Thielen, James G. Ho, David A. Burchman, Gregory D. Goodno, Joshua E. Rothenberg, Michael G. Wickham, Angel Flores, Chunte A. Lu, Benjamin Pulford, Craig Robin, Anthony D. Sanchez, D. Hult, and K. B. Rowland, "Two-dimensional diffractive coherent combining of 15 fiber amplifiers into a 600 W beam," Opt. Lett. 37, 3741-3743 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-18-3741


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