Achromatic critically coupled racetrack resonators

Clément Arlotti 1 Olivier Gauthier-Lafaye 1 Antoine Monmayrant 1 Stéphane Calvez 1
1 LAAS-PHOTO - Équipe Photonique
LAAS - Laboratoire d'analyse et d'architecture des systèmes [Toulouse]
Abstract : In this paper, we investigate the spectral response of whispering-gallery-mode (WGM) resonators coupled to their access waveguide with a view to design their constitutive waveguides to promote critical-coupling over a wide spectral range and thereby facilitate their use for high-sensitivity sensing or nonlinear frequency conversion applications. The carried-out theoretical analysis is based on the universal response functions of singlemode and unidirectional devices. A coupled-mode treatment of the coupling region enables to derive two sets of favorable designs. The identified resonator/access waveguide systems exploit waveguides with mismatched propagation constants forming a coupling section exhibiting either an achromatic beat-length or an achromatic power-transfer coefficient. This generic model is followed by a numerical case study of vertically-coupled Si3N4 racetrack resonators. The conventional (quasi-)phase-matched configuration, treated as a reference case, is shown to display a critical-coupling bandwidth of 23 nm at a wavelength of 1550nm, whereas the proposed new designs demonstrate critical bandwidths larger than 330nm, i.e. exhibit bandwidths enhanced by more than one order of magnitude.
Type de document :
Article dans une revue
Journal of the Optical Society of America B, Optical Society of America, 2017, 34 (11), pp.2343-2351. 〈10.1364/JOSAB.34.002343〉
Liste complète des métadonnées

Littérature citée [14 références]  Voir  Masquer  Télécharger
Contributeur : Stéphane Calvez <>
Soumis le : mercredi 18 octobre 2017 - 21:03:53
Dernière modification le : mercredi 28 février 2018 - 10:23:14
Document(s) archivé(s) le : vendredi 19 janvier 2018 - 14:23:52


Fichiers produits par l'(les) auteur(s)



Clément Arlotti, Olivier Gauthier-Lafaye, Antoine Monmayrant, Stéphane Calvez. Achromatic critically coupled racetrack resonators. Journal of the Optical Society of America B, Optical Society of America, 2017, 34 (11), pp.2343-2351. 〈10.1364/JOSAB.34.002343〉. 〈hal-01619015〉



Consultations de la notice


Téléchargements de fichiers