Dynamics of Passively Phased Ring Oscillator Fiber Laser Arrays

In this paper, we study fiber laser arrays coupled in a spatially filtered ring oscillator geometry that produces a tiled-array output. In particular, we examine the passive phasing dynamics, the efficiency of coherent combination, and the dependence of the system's behavior on nonlinearities i...

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Bibliographic Details
Published inIEEE journal of quantum electronics Vol. 51; no. 8; pp. 1 - 9
Main Authors Sivaramakrishnan, Sudarshan, Wei-Zung Chang, Galvanauskas, Almantas, Winful, Herbert G.
Format Journal Article
LanguageEnglish
Published IEEE 01.08.2015
Subjects
Beam combining
Couplings
fiber laser arrays
Fiber lasers
Mathematical model
Optical fiber amplifiers
Optical fiber couplers
Optical fiber dispersion
Steady-state
fiber laser arrays
fiber lasers
Beam combining
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Summary:In this paper, we study fiber laser arrays coupled in a spatially filtered ring oscillator geometry that produces a tiled-array output. In particular, we examine the passive phasing dynamics, the efficiency of coherent combination, and the dependence of the system's behavior on nonlinearities in the fibers. For an array containing a small number of elements, we find that the fibers achieve a co-phased state within two round trips after a perturbation. Steady-state results agree with the previous work. We also find that the Kerr nonlinearity decreases the combining efficiency as determined from the on-axis intensity in the far-field output.
ISSN:0018-9197
1558-1713
DOI:10.1109/JQE.2015.2449310