Higher wavelength optimized optical fiber waveguide

G - Physics – 02 – B

Patent

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G02B 6/10 (2006.01) G02B 6/02 (2006.01) G02B 6/036 (2006.01) H04B 10/20 (2006.01) H04J 14/02 (2006.01)

Patent

CA 2382957

Single mode optical fiber waveguides with reduced bending losses for wavelength range of 1300 nm to 1700 nm are disclosed. The extended ranges are achieved by altering the optical characteristics of the fiber, namely, the MAC number, the mode field diameter ("MFD"), and the cut-off wavelength. The single mode fibers disclosed exhibit a lower MFD and higher cut-off wavelength. In addition, optical fiber transmission systems, wave division multiplexing ("WDM") systems, and optical fiber ribbon cables are disclosed that incorporate the single mode optical fiber. Figure 2 shows the refractive index profile as a function of the fiber radius. Figure 6 illustrates a ribbon cable (700) with 4 fibers in a matrix material (708). Each fiber consists of a central core (702), a cladding layer (703), a primary (704) and a secondary polymer layer (705) and a colored ink coating layer (706).

L'invention porte sur des guides d'onde à fibres optiques à mode unique qui présentent une bande de transmission plus large dans la plage de longueurs d'onde comprise entre environ 1300 nm et environ 1700 nm avec une perte de courbure réduite. Les plages étendues de ces fibres sont obtenues par modification des caractéristiques optiques de la fibre, à savoir, le numéro MAC, le diamètre de champ de mode ("MFD") et la longueur d'onde critique. Les fibres à mode unique présentent un diamètre de champ de mode inférieur et une longueur d'onde critique supérieure qui sont la conséquence de la modification du numéro MAC du guide d'onde à fibres optiques. L'invention porte, en outre, sur des systèmes de transmission à fibres optiques, des systèmes de multiplexage par division d'onde et des câbles à rubans de fibres optiques qui comprennent la fibre optique à mode unique de cette invention.

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