High-power Lasers for Directed-energy Applications: Comment
Sprangle et al. [Appl. Opt. 54, F201 (2015) recently concluded that our experiments on coherent combining of laser beams over an atmospheric path [Opt. Lett. 36, 4455 (2011) were “effective only because at these low-power levels the linewidth of the lasers was very narrow… and the level of atmospheric turbulence was low….” These conclusions are inaccurate, not relevant to practical high-power coherently combined laser systems, and contradict our most recent experiments with coherent combining of 21 laser beams with a linewidth of about 1 GHz over 7 km distance. In this comment we also challenge the major conclusion of Sprangle et al. [Appl. Opt. 54, F201 (2015) and the more recently published paper by Nelson et al. [Appl. Opt. 55, 1757 (2016) regarding inefficiency of coherent beam combining under typical atmospheric conditions.
Copyright © 2016, Optical Society of America
Optical Society of America
Vorontsov, Mikhail and Weyrauch, Thomas, "High-power Lasers for Directed-energy Applications: Comment" (2016). Electro-Optics and Photonics Faculty Publications. 84.