Low dispersion slope negative dispersion optical fiber

G - Physics – 02 – B

Patent

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G02B 6/036 (2006.01) H04B 10/18 (2006.01)

Patent

CA 2392482

Disclosed is a segmented core optical waveguide fiber having low total dispersion slope and negative total dispersion over an extended wavelength window. A wavelength window of particular interest is that in the range of about 1500 nm to 1600 nm. The waveguide fibers in accordance with the invention also have cabled cut off wavelength below about 1480 nm and attenuation at 1550 nm of less than 0.22 dB/km. Mode field diameter is maintained essentially at the nominal value for dispersion shifted waveguide fiber, i.e., 7.7 µm to 8.7 µm. Embodiments having a center segment and a first and a second annular segment are discussed in detail.

La présente invention concerne une fibre guide d'ondes optiques à coeur segmenté présentant une faible pente de dispersion totale en dispersion totale négative dans toute l'étendue d'une large plage de longueurs d'ondes. La plage de longueurs d'ondes intéressante est celle qui va d'environ 1500 nm à 1600 nm. En l'occurrence, les fibres guide d'ondes de l'invention comportent également des longueurs d'ondes de coupure de type câblé se situant en dessous d'environ 1480 nm pour une atténuation de moins de 0,22 dB/km à 1550 nm. Le diamètre du champ de mode est maintenu essentiellement à la valeur nominale pour les fibres guides d'ondes à dispersion décalée, c'est à dire 7,7 µm à 8,7 µm. L'invention concerne également des réalisations comportant un segment central et un premier et un second segment annulaire.

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