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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 8 — Mar. 10, 2014
  • pp: 1493–1502

Orthogonal coding methods for increasing the number of multiplexed channels in coherent beam combining

A. Azarian, P. Bourdon, L. Lombard, Y. Jaouën, and O. Vasseur  »View Author Affiliations


Applied Optics, Vol. 53, Issue 8, pp. 1493-1502 (2014)
http://dx.doi.org/10.1364/AO.53.001493


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Abstract

We introduce orthogonally coded modulations for active coherent beam combining (CBC), and show how using Walsh codes enables the increase of the number of combined channels. Analytical, numerical, and experimental results are presented and compared to the standard multifrequency dithering technique, demonstrating that at least 5 times more fibers can be combined using the same modulation frequency. The modulation format excluded, no particular changes in the system need to be introduced and the benefits of active coherent beam combing, such as atmospheric turbulence compensation capability, are kept unchanged. Finally, we point out that this approach can be applied in partially CBC.

© 2014 Optical Society of America

OCIS Codes
(060.5060) Fiber optics and optical communications : Phase modulation
(140.3298) Lasers and laser optics : Laser beam combining

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: July 8, 2013
Revised Manuscript: January 23, 2014
Manuscript Accepted: January 27, 2014
Published: March 3, 2014

Citation
A. Azarian, P. Bourdon, L. Lombard, Y. Jaouën, and O. Vasseur, "Orthogonal coding methods for increasing the number of multiplexed channels in coherent beam combining," Appl. Opt. 53, 1493-1502 (2014)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-53-8-1493


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