Highly efficient higher-order modes filtering into aperiodic very large mode area fibers for single-mode propagation

Aurélien Benoit (1) , Romain Dauliat (1) , Raphaël Jamier (1) , Georges Humbert (1) , Stephan Grimm (2) , Kay Schuster (2) , François Salin (3) , Philippe Roy (1)

1 XLIM-PHOT - Photonique Fibre et Sources Cohérentes
2 IPHT - Institute of Photonic Technology
3 Eolite Systems

We report here on the first experimental demonstration, to the best of our knowledge, of a new generation of very large mode area (VLMA) fibers intended to strengthen single-mode propagation. The originality of this work relies on an aperiodicity of the inner cladding microstructuration exacerbating the spatial rejection of higher-order-modes (HOMs) while preserving a significant confinement of the fundamental mode. The single-mode behavior was demonstrated using an optical low-coherence interferometry measurement based on the group-velocity dispersion. As suggested through a preliminary numerical approach, this outstanding characteristic/behavior is evidenced over a large spectral range spanning from 1 to 2 μm for a core diameter of 60 μm. Core scalability was also investigated.

Mots clés: Microstructured fibers; Fibers; single-mode; Lasers; fiber

Domaines: Optique [physics.optics]

Aurélien Benoit, Romain Dauliat, Raphaël Jamier, Georges Humbert, Stephan Grimm, et al.. Highly efficient higher-order modes filtering into aperiodic very large mode area fibers for single-mode propagation. Optics Letters, 2014, 39 (15), pp.4561. ⟨10.1364/OL.39.004561⟩. ⟨hal-01059123⟩