New method of preform production for chalcogenide fibres

David Le Coq (1) , Catherine Boussard-Plédel (1) , Gilles Fonteneau (1) , Thierry Pain (1) , Bruno Bureau (1) , Jean-Luc Adam (1)

1 Laboratoire Verres et Céramiques

Double index optical fibres based on chalcogenide glasses have been manufactured from preforms designed by an original method. Based on the build-in casting principle, this new process is implemented inside a sealed silica ampoule. The glass compositions Te2.5As3Se4.5 and Te2As3Se5 were chosen as core and cladding, respectively. They are synthesised separately by purification, melting and homogenisation of the raw elements under vacuum. Adjustment of the successive parameters controlling the preform preparation can lead to a ratio of core/cladding diameter ranging from 0.25 to 0.75. Successive improvements in the process allowed a minimum of attenuation to be obtained, measured by the cut-back technique,equal to 1.7 dB/m in the 6.5-9.5 µm spectral domain

Domaines: Matériaux; Matériaux; Optique / photonique

David Le Coq, Catherine Boussard-Plédel, Gilles Fonteneau, Thierry Pain, Bruno Bureau, et al.. New method of preform production for chalcogenide fibres. Glass Technology, 2003, 44 (3), pp.132-136. ⟨hal-01427382⟩