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Proceedings Paper

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

Paper Details

Date Published: 25 September 2007
PDF: 9 pages
Proc. SPIE 6708, Atmospheric Optics: Models, Measurements, and Target-in-the-Loop Propagation, 67080D (25 September 2007); doi: 10.1117/12.736368
Show Author Affiliations
Ling Liu, Univ. of Maryland, College Park (United States)
Dimitrios N. Loizos, Johns Hopkins Univ. (United States)
Mikhail A. Vorontsov, Univ. of Maryland, College Park (United States)
Army Research Lab. (United States)
Paul P. Sotiriadis, Johns Hopkins Univ. (United States)
Gert Cauwenberghs, University of California, San Diego (United States)


Published in SPIE Proceedings Vol. 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, Editor(s)

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