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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 35, Iss. 23 — Dec. 1, 2010
  • pp: 3931–3933

Collective phase measurement of an array of fiber lasers by quadriwave lateral shearing interferometry for coherent beam combining

C. Bellanger, B. Toulon, J. Primot, L. Lombard, J. Bourderionnet, and A. Brignon  »View Author Affiliations


Optics Letters, Vol. 35, Issue 23, pp. 3931-3933 (2010)
http://dx.doi.org/10.1364/OL.35.003931


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Abstract

We present a new configuration of quadriwave lateral shearing interferometer dedicated to phase detection for beam-combining purposes. Assuming that the fibers are disposed in a matrix arrangement, our scheme gives direct access to the phase step between adjacent fibers in two dimensions. Experimentally recorded interferograms are made only of two-wave interference fringes that scroll as the phase evolves in the fibers. This simplicity allows fast treatment by the spatial demodulation process, and the phase map from the fibers can be estimated in real time. No external reference is required, and the technique is fully compatible with a high number of fibers.

© 2010 Optical Society of America

OCIS Codes
(050.5080) Diffraction and gratings : Phase shift
(100.5070) Image processing : Phase retrieval
(140.3298) Lasers and laser optics : Laser beam combining

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: July 26, 2010
Revised Manuscript: October 11, 2010
Manuscript Accepted: October 27, 2010
Published: November 22, 2010

Citation
C. Bellanger, B. Toulon, J. Primot, L. Lombard, J. Bourderionnet, and A. Brignon, "Collective phase measurement of an array of fiber lasers by quadriwave lateral shearing interferometry for coherent beam combining," Opt. Lett. 35, 3931-3933 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-23-3931


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