Vol. 32, issue 07, article # 12

Kolosov V.V., Levitsky M.E., Petukhov T.D., Simonova G.V. Formation of feedback loop for phase control of a fiber laser array. // Optika Atmosfery i Okeana. 2019. V. 32. No. 07. P. 591–598 [in Russian].
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Methods for phasing of an array of radiation channels for coherent combining of linearly polarized fields of narrowband fiber lasers are considered. The high efficiency of operation of the internal feedback loop based on interference of peripheral sections of radiation (Gaussian beam tails) of the phased channels is demonstrated. This method is easy to implement. It allows scaling the power of optical phased arrays and does not require massive optical elements. Equations for calculation of the optical arrangement for implementation of the feedback loop are presented along with the results of experiment on coherent combining of three beams.


fiber laser, optical phased arrays, coherent combining, feedback loop


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