Method of making segmented core optical waveguide preforms

C - Chemistry – Metallurgy – 03 – B

Patent

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C03B 37/018 (2006.01) C03B 37/012 (2006.01) C03B 37/014 (2006.01)

Patent

CA 2247970

A method of making a segmented core optical waveguide preform for making fiber that is resistant to attenuation increases due to hydrogen and heat aging. A first core region comprising a silica glass rod containing at least a first dopant is inserted into a central opening of a second core region comprising silica soot containing a second dopant. The first core region and second core region are consolidated together to form a segmented core region and cladding is deposited on the outer surface of the segmented core region.

Méthode pour faire une préforme de guide d'onde optique à coeur segmenté en vue de fabriquer une fibre résistant aux augmentations d'affaiblissement dues au vieillissement sous l'effet de l'hydrogène et de la chaleur. Une première zone de coeur constituée d'une tige de verre de silice contenant au moins un premier dopant est introduite dans une ouverture centrale d'une deuxième zone de coeur constituée de suie de silice contenant un deuxième dopant. La première zone de coeur et la deuxième zone de coeur sont solidarisées pour former une zone de coeur segmenté et un revêtement est déposé à la surface extérieure de la zone de coeur segmenté.

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