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Coherent combining pulse bursts in time domain

United States Patent

9,865,986
January 9, 2018
View the Complete Patent at the US Patent & Trademark Office
A beam combining and pulse stacking technique is provided that enhances laser pulse energy by coherent stacking pulse bursts (i.e. non-periodic pulsed signals) in time domain. This energy enhancement is achieved by using various configurations of Fabry-Perot, Gires-Tournois and other types of resonant cavities, so that a multiple-pulse burst incident at either a single input or multiple inputs of the system produces an output with a solitary pulse, which contains the summed energy of the incident multiple pulses from all beams. This disclosure provides a substantial improvement over conventional coherent-combining methods in that it achieves very high pulse energies using a relatively small number of combined laser systems, thus providing with orders of magnitude reduction in system size, complexity, and cost compared to current combining approaches.
Galvanauskas; Almantas (Ann Arbor, MI)
THE REGENTS OF THE UNIVERSITY OF MICHIGAN (Ann Arbor, MI)
15/ 104,924
December 19, 2014
GOVERNMENT CLAUSE This invention was made with government support under Grant No. DE-SC0006377 awarded by the U.S. Department of Energy, and N6601-11-1-4208 awarded by the U.S. Defense Advanced Research Projects Agency. The government has certain rights in this invention.