Structured tellurite glass optical fiber and production...

G - Physics – 02 – B

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G02B 6/00 (2006.01) C03B 37/012 (2006.01) G02F 1/365 (2006.01)

Patent

CA 2509790

An optical fiber, which has a zero-material dispersion wavelength equal to or greater than 2 µm, and a high nonlinear susceptibility .chi.3 equal to or greater than 1 x 10 -12 esu, and uses tellurite glass having sufficient thermal stability for processing into a low loss fiber, employs a PCF structure or HF structure having strong confinement into a core region. This enables light to propagate at a low loss. The size and geometry of air holes formed in the core region, and the spacing between adjacent air holes make it possible to control the zero dispersion wavelength within an optical telecommunication window (1.2-1.7 µm), and to achieve large nonlinearity with a nonlinear coefficient .gamma. equal to or greater than 500W-1 km-1.

Cette invention concerne une fibre optique en verre de tellurite présentant une longueur d'onde de dispersion matérielle nulle d'au moins 2µm, un coefficient de sensibilité linéaire X?3¿ d'au moins 1 x 10?-12¿ esu et une stabilité thermique suffisante pour être transformée en une fibre à faible perte. A cette fin, on utilise une structure PCF ou une structure HF a fort confinement par rapport à l'âme, ce qui permet un guidage par onde à faible perte de la lumière. Une longueur d'onde de dispersion nulle est maintenue dans une bande de longueur d'onde de communication de 1,2-1,7 µm par la taille et la forme d'un trou formé dans l'âme et par l'intervalle entre trous adjacents, avec une non-linéarité importante de constante de non linéarité .UPSILON. d'au moins 500 W?-1¿k?-1¿.

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