Hypocycloid-shaped hollow-core photonic crystal fiber Part I: Cups curvature effect on confinement loss

Benoît Debord (1) , Meshaal Alharbi (2) , Tom Bradley (2) , Coralie Fourcade Dutin (1, 2) , Yingying Wang (1, 2) , Luca Vincetti (3) , Frédéric Gérôme (1) , Fetah A. Benabid (1, 2)

1 XLIM-PHOTONIQUE - PHOTONIQUE
2 University of Bath [Bath]
3 Department of Information Engineering [Modena]

We report on numerical and experimental studies showing the influence of arc curvature on the confinement loss in hypocycloid-core Kagome hollow-core photonic crystal fiber. The results prove that with such a design the optical performances are strongly driven by the contour negative curvature of the core-cladding interface. They show that the increase in arc curvature results in a strong decrease in both the confinement loss and the optical power overlap between the core mode and the silica core-surround, including a modal content approaching true single-mode guidance. Fibers with enhanced negative curvature were then fabricated with a record loss-level of 17 dB/km at 1064 nm.

Domaines: Sciences de l'ingénieur [physics]; Optique / photonique

Benoît Debord, Meshaal Alharbi, Tom Bradley, Coralie Fourcade Dutin, Yingying Wang, et al.. Hypocycloid-shaped hollow-core photonic crystal fiber Part I: Cups curvature effect on confinement loss. Optics Express, 2013, 21 (23), pp.28597. ⟨hal-00923916⟩