Optical waveguides – With optical coupler – Plural
Reexamination Certificate
2006-05-09
2006-05-09
Font, Frank G. (Department: 2883)
Optical waveguides
With optical coupler
Plural
C359S199200
Reexamination Certificate
active
07043112
ABSTRACT:
An optical wavelength-multiplexing system allowing long distance transmission with reducing effects of noise and fiber nonlinealities is disclosed. First wavelength-multiplexing light and second wavelength-multiplexing light within a wavelength bandwidth of 100 nm or more are propagated in opposite directions through the same optical fiber. The wavelength band of the first wavelength-multiplexing light is set to a shorter wavelength side as compared to that of the second wavelength-multiplexing light. In addition, excitation light having a wavelength shorter than the wavelength band of the first wavelength-multiplexing light is propagated through the optical fiber in the same direction as the second wavelength-multiplexing light. The excitation light is shorter in wavelength than the first wavelength-multiplexing light by an amount determined depending on Raman scattering characteristic of the optical fiber.
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Japanese oFfice Action dated Nov. 4, 2003 with English translation of pertinent portions.
Font Frank G.
Whitham Curtis & Christofferson, P.C.
Wong Eric
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