High performance single mode waveguide

Details High performance single mode waveguide High performance single mode waveguide

G - Physics

02

B

G02B 6/036 (2006.01)

Patent

CA 2305232

Disclosed is a single mode optical waveguide fiber having a segmented core design. In particular, the core comprises three segments (2, 6, 8), each having characteristic dimensions and refractive index profile. By proper choice of index profile in each segment, a waveguide fiber is made which has a mode field diameter of about 9.5, low, positive total dispersion over the operating window 1530 nm to 1565 nm as well as effective area greater than 60 µm2. The profile is further defined by the inner and outer profile volume and the ratio of outer to inner volume. Thus, inner volume is in the range 2.28 to 3.26 % µm2, the outer profile volume is in the range 3.70 to 13.75 % µm2, and the ratio of outer to inner volume is in the range 1.5 to 4.3.

Cette invention se rapporte à une fibre guide d'onde optique monomode, ayant une conception d'âme segmentée. L'âme comprend plus particulièrement trois segments (2, 6, 8), ayant chacun une courbe d'indice de réfraction et des dimensions caractéristiques. En choisissant correctement la courbe de l'indice de réfraction de chaque segment, on obtient une fibre guide d'onde qui possède un diamètre de champ de mode d'environ 9,5, une dispersion totale positive basse dans la fenêtre d'exploitation comprise entre 1530 et 1565 nm, ainsi qu'une superficie effective supérieure à 60 µm?2¿. Cette courbe est en outre définie par le volume de courbe interne et externe et par le rapport entre le volume externe et le volume interne. Le volume interne se situe entre 2,28 et 3,26 % µm?2¿, le volume de courbe externe est compris entre 3,70 et 13,75 % µm?2¿ et le rapport entre le volume externe et le volume interne est compris entre 1,5 et 4,3.

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