Technological implementation of Bragg grating reflectors in Ti: LiNbO3 waveguides by proton exchange

Badr-Eddine Benkelfat (1, 2, 3, 4) , Richard Ferriere (5) , Bruno Wacogne (5) , Pascal Mollier (5)

1 SAMOVAR - Services répartis, Architectures, MOdélisation, Validation, Administration des Réseaux
2 TSP - EPH - Département Electronique et Physique
3 TSP - Télécom SudParis
4 IP Paris - Institut Polytechnique de Paris
5 FEMTO-ST - Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174)

The authors propose and demonstrate a simple and novel method for fabrication of efficient Bragg grating reflectors at telecommunication wavelengths in titanium-indiffused lithium niobate single-mode channel waveguides. This technique is based on the patterned proton-exchanged process. The validity of the method is verified by the good agreement of the spectral responses and the Bragg phase-matching condition. Reflectivity as high as 94% at 1546 nm was measured with 4-mm distributed parameter waveguides in z-cut lithium niobate.

Mots clés: Gratings; Integrated optics; LiNbO 3; Optical waveguides; Tunable filters

Domaines: Optique / photonique

Badr-Eddine Benkelfat, Richard Ferriere, Bruno Wacogne, Pascal Mollier. Technological implementation of Bragg grating reflectors in Ti: LiNbO3 waveguides by proton exchange. IEEE Photonics Technology Letters, 2002, 14 (10), pp.1430-1432. ⟨10.1109/LPT.2002.801106⟩. ⟨hal-00093651⟩