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

Ling Liu; Dimitrios N. Loizos; Mikhail A. Vorontsov; Paul P. Sotiriadis; Gert Cauwenberghs

doi:10.1117/12.736368

25 September 2007 Coherent combining of multiple beams with multi-dithering technique: 100KHz closed-loop compensation demonstration

Ling Liu, Dimitrios N. Loizos, Mikhail A. Vorontsov, Paul P. Sotiriadis, Gert Cauwenberghs

Author Affiliations +

Proceedings Volume 6708, Atmospheric Optics: Models, Measurements, and Target-in-the-Loop Propagation; 67080D (2007) https://doi.org/10.1117/12.736368
Event: Optical Engineering + Applications, 2007, San Diego, California, United States

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.

Citation Download 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 (25 September 2007); https://doi.org/10.1117/12.736368

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