title: Coherent fiber combining by digital holography.
abstract: We present an original technique for coherent beam combining of an array of fiber amplifiers based on self-adaptive digital holography. In this method, the phase errors between the fibers of the array are compensated by using the diffracted phase-conjugated -1 order of a digital hologram. The proposed method is compatible with a large number of fibers and simply implemented with a CCD detector matrix and a spatial light modulator. This concept is analyzed and experimentally demonstrated with three polarization-maintaining passive fibers at 1.06 microm.
authors.affiliation: Thales Research and Technology, Campus de Polytechnique, 91767 Palaiseau Cedex, France. cindy.bellanger@thalesgroup.com
authors.forename: C
authors.initials: C
authors.lastname: Bellanger
authors.forename: A
authors.initials: A
authors.lastname: Brignon
authors.forename: J
authors.initials: J
authors.lastname: Colineau
authors.forename: J P
authors.initials: JP
authors.lastname: Huignard