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Proceedings Article

Coherent combining of multiple beams with multi-dithering technique: 100KHz closed-loop compensation demonstration

[+] Author Affiliations
Ling Liu

Univ. of Maryland, College Park

Dimitrios N. Loizos, Paul P. Sotiriadis

Johns Hopkins Univ.

Mikhail A. Vorontsov

Univ. of Maryland, College Park and Army Research Lab.

Gert Cauwenberghs

University of California, San Diego

Proc. SPIE 6708, Atmospheric Optics: Models, Measurements, and Target-in-the-Loop Propagation, 67080D (September 25, 2007); doi:10.1117/12.736368
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From Conference Volume 6708

  • Atmospheric Optics: Models, Measurements, and Target-in-the-Loop Propagation
  • Stephen M. Hammel; Alexander M. J. van Eijk; Michael T. Valley; Mikhail A. Vorontsov
  • San Diego, CA | August 26, 2007

abstract

We demonstrate the coherent combining of three beams with a phase-locking controller using VLSI multi-dithering technique. Three fiber-coupled phase shifters are used to compensate phase distortions in the beam propagation path. The highest dither frequency in our system is ~70MHz. The achieved closed-loop compensation bandwidth of three beamlets is up to 100KHz.

© (2007) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Ling Liu ; Dimitrios N. Loizos ; Mikhail A. Vorontsov ; Paul P. Sotiriadis and Gert Cauwenberghs
"Coherent combining of multiple beams with multi-dithering technique: 100KHz closed-loop compensation demonstration", Proc. SPIE 6708, Atmospheric Optics: Models, Measurements, and Target-in-the-Loop Propagation, 67080D (September 25, 2007); doi:10.1117/12.736368; http://dx.doi.org/10.1117/12.736368


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