Method of and apparatus for expanding mode field diameter of...

Details Method of and apparatus for expanding mode field diameter of... Method of and apparatus for expanding mode field diameter of...

C - Chemistry, Metallurgy

03

B

C03B 32/00 (2006.01) C03B 23/043 (2006.01) G02B 6/255 (2006.01)

Patent

CA 2421350

A method of and an apparatus for expanding the mode field diameter of an op- tical fiber by heating a specified region of the optical fiber with a uniform or desired temperature distribution for forming a thermally-diffused expanded core (TEG). The mode field diameter of the optical fiber is expanded by heat- ing an optical fiber 1 with a burner 11 so as to thermally diffuse the dopant forming the refractive-index profile. The burner 11 has a heating surface 11a in which a plurality of gas-issuing holes 12 are arranged such that a plurality of parallel rows each of which is composed of a plurality of gas-issuing holes 12 are parallel to the axis of the optical fiber 1.

Une méthode et un appareil permettant d'étendre le diamètre de champ de mode d'une fibre optique en chauffant une région spécifique de la fibre optique avec une distribution uniforme ou personnalisée de la température afin de former un coeur étendu par diffusion thermique (TEC). Le diamètre de champ de mode de la fibre optique est étendu en chauffant une fibre optique 1 au moyen d'un brûleur 11 de manière à diffuser de manière thermique le dopant formant le profil d'indice de réfraction. Le brûleur 11 présente une surface de chauffage 11a dans laquelle plusieurs orifices de libération de gaz 12 sont disposés de manière à ce que plusieurs lignes, chacune composée de plusieurs orifices de libération de gaz 12, soient parallèles à l'axe de la fibre optique 1.

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