All-solid aperiodic Large Pitch Fibers for operation in high power regime

Romain Dauliat (1) , Dia Darwich (1) , Aurélien Benoit (1) , Raphaël Jamier (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

This communication intends to summarize the recent strides carried out by the study of original Very Large Mode Area fibers (VLMA) that offer remarkable beam qualities. This work also aims in pushing farther the threshold of appearance for non-linear processes as well as thermal induced beam degradation hindering the power scaling in optical fibers. So as to fulfil this objective, thorough investigations of fibers modal content has been performed, leading to the evidencing of primordial statements for exacerbation of the beam quality and its robustness. Theoretical principles driven toward the conception of aperiodic Large Pitch Fibers (LPFs) will be reported together with experimental validation into passive fiber designs. The relevance of these original structures will then been discussed in regard to the power scaling.

Mots clés: High power regime; Fiber laser and amplifiers; aperiodic Large Pitch Fiber; Singlemodedness; thermal induced refractive index changes

Domaines: Optique [physics.optics]

Romain Dauliat, Dia Darwich, Aurélien Benoit, Raphaël Jamier, Stephan Grimm, et al.. All-solid aperiodic Large Pitch Fibers for operation in high power regime. 17th International Conference on Transparent Optical Networks (ICTON), Jul 2015, Budapest, Hungary. ⟨10.1109/ICTON.2015.7193357⟩. ⟨hal-01250260⟩