Transmittance and near-field characterization of sub-wavelength tapered optical fibers

Fedja Orucevic (1) , Valérie Lefèvre-Seguin (1) , Jean Hare (1)

1 LKB (Lhomond) - Laboratoire Kastler Brossel

We have produced high transmission sub-wavelength tapered optical fibers for the purpose of whispering gallery mode coupling in fused silica microcavities at 780~nm. A detailed analysis of the fiber transmittance evolution during tapering is demonstrated to reflect precisely the mode coupling and cutoff in the fiber. This allows to control the final size, the number of guided modes and their effective index. These results are checked by evanescent wave mapping measurements on the resulting taper.

Mots clés: Fiber optics; Fiber characterization; Taper; Optical resonators; Microcavity devices; Near Field

Domaines: Physique Quantique [quant-ph]

Fedja Orucevic, Valérie Lefèvre-Seguin, Jean Hare. Transmittance and near-field characterization of sub-wavelength tapered optical fibers. Optics Express, 2007, 15 (21), pp.13624-13629. ⟨hal-00257805⟩