The European Physical Journal Special Topics

, Volume 224, Issue 13, pp 2551–2555

Highly scalable coherent fiber combining

  • M. Antier
  • J. Bourderionnet
  • C. Larat
  • E. Lallier
  • A. Brignon
Review ICAN Science

DOI: 10.1140/epjst/e2015-02564-x

Cite this article as:
Antier, M., Bourderionnet, J., Larat, C. et al. Eur. Phys. J. Spec. Top. (2015) 224: 2551. doi:10.1140/epjst/e2015-02564-x
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Part of the following topical collections:
  1. Science and Applications of the Coherent Amplifying Network (CAN) Laser

Abstract

An architecture for active coherent fiber laser beam combining using an interferometric measurement is demonstrated. This technique allows measuring the exact phase errors of each fiber beam in a single shot. Therefore, this method is a promising candidate toward very large number of combined fibers. Our experimental system, composed of 16 independent fiber channels, is used to evaluate the achieved phase locking stability in terms of phase shift error and bandwidth. We show that only 8 pixels per fiber on the camera is required for a stable close loop operation with a residual phase error of λ/20 rms, which demonstrates the scalability of this concept. Furthermore we propose a beam shaping technique to increase the combining efficiency.

Copyright information

© EDP Sciences and Springer 2015

Authors and Affiliations

  • M. Antier
    • 1
  • J. Bourderionnet
    • 1
  • C. Larat
    • 1
  • E. Lallier
    • 1
  • A. Brignon
    • 1
  1. 1.Thales Research & TechnologyPalaiseauFrance

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