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Opt Lett. 2004 Mar 1;29(5):474-6.

Coherent beam combining and phase noise measurements of ytterbium fiber amplifiers.

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  • 1Massachusetts Institute of Technology Lincoln Laboratory, 244 Wood Street, Lexington, Massachusetts 02420, USA.


Phase noise characterization of a 10-W Yb fiber amplifier is presented, and we demonstrate phase locking of two fiber amplifiers with near-perfect fringe contrast at power levels of as much as 10 W per fiber. Coherent beam combining is maintained during the turn-on transient as well as in thermal steady-state operation.

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