H. Tünnermann
J. Neumann
D. Kracht
P. Weßels

All-fiber phase actuator based on an erbium-doped fiber amplifier for coherent beam combining at 1064 nm

Opt. Lett.
4
36
448-450
2011
Type: Zeitschriftenaufsatz (reviewed)
Abstract
Active phase control in fiber amplifiers is of considerable interest for low-noise single-frequency amplifiers and for coherent beam combining. We demonstrate phase control at 1064nm by use of an erbium-doped fiber. We investigated the phase shift by guiding the beam through an erbium-doped fiber amplifier in a Mach–Zehnder configuration and applied the results to stabilize the relative phase of two ytterbium-doped fiber amplifiers. To the best of our knowledge, this is the first demonstration of an all-fiber coherent beam combining at 1064nm employing an erbium-doped fiber as a phase actuator.