Passive phase locking of an array of four fiber amplifiers by an all-optical feedback loop.
We report the passive phase locking of an array of four fiber amplifiers in a unidirectional ring cavity. The feedback loop consists of a single-mode fiber that filters intracavity the far-field pattern of the four emitted beams. The pointing of the laser output can be managed by the intracavity filtering.
Lhermite
Jérôme
J
XLIM, UMR CNRS 6172, 123 Avenue A. Thomas, 87060 Limoges Cedex, France. jerome.lhermite@xlim.fr
Desfarges-Berthelemot
Agnès
A
Kermene
Vincent
V
Barthelemy
Alain
A