Open AccessCoherence properties of two fiber lasers coupled by mutual injection
Author(s) -
Sandrine Auroux,
Vincent Kermène,
Agnès DesfargesBerthelemot,
Alain Barthélémy
Publication year - 2009
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.017694
Subject(s) - optics , coherence (philosophical gambling strategy) , laser , fiber laser , mutual coherence , degree of coherence , physics , coherence time , coherence theory , coherence length , beam (structure) , materials science , superconductivity , quantum mechanics
Phase locking of two fiber lasers is obtained by mutual injection. The coherence properties of this composite laser are analyzed. In the most general case, the radiations at the two output mirrors of the laser are not mutually coherent. The cross-correlation of the two emitted beams shows that an extra-cavity delay line is required to get stable and high visibility interference fringes. Such a laser configuration is attractive for coherent beam combining in the far field provided the multiple output beams are properly time delayed.