High capacity optical fiber network operating in the 1385 nm...

Details High capacity optical fiber network operating in the 1385 nm... High capacity optical fiber network operating in the 1385 nm...

H - Electricity

04

J

H04J 14/02 (2006.01) H04B 10/17 (2006.01)

Patent

CA 2296945

A high-capacity optical fiber network [100, 200] includes wavelength-division multiplexing (WDM) within the 1.4 micron (µm) wavelength region (i.e., 1335- 1435 nm). Such a system includes optical fiber [130] whose peak loss in the 1.4 µm region is less than its loss at 1310 nm. The optical fiber has a zero dispersion wavelength (.lambda.0) at about 1310 nm, and linear dispersion between about 1.5 and 8.0 ps/nm-km within the 1.4 µm region. At least three WDM channels operate at 10 Gb/s in the 1.4 µm wavelength region and have a channel separation of 100 GHz. In one illustrative embodiment of the invention, a broadcast television channel, having amplitude modulated vestigial sideband modulation, simultaneously operates in the 1.3 µm region (i.e., 1285-1335 nm) and/or the 1.55 µm region (i.e., 1500-1600 nm). In another embodiment of the invention, 16 digital data channels are multiplexed together in the 1.55 µm region, each channel operating at about 2.5 Gb/s. Raman amplifiers [103, 113] are used for amplification in the 1.3 µm and the 1.4 µm wavelength regions, whereas an Erbium amplifier [123] is used for amplification in the 1.55 µm wavelength region.

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