Claims
- 1. Wavelength division multiplexed optical waveguide system including: a transmitter for generating, modulating, and multiplexing modulated channel carriers for introduction into a transmission line, the transmitter being characterized by a "system wavelength" of magnitude within the wavelength range of the grouped channel carriers; a receiver for performing functions including demultiplexing modulated channel carriers; optical amplifiers; and a transmission line of optical fiber including at least one fiber span defined at one end by a transmitter and at the other end by a receiver, in which the span includes at least one optical amplifier,
- CHARACTERIZED IN THAT
- a substantial portion of optical fiber in the span consists of fiber of absolute value of dispersion .gtoreq.4 ps/nm-km at the system wavelength but includes lengths of both signs of dispersion, whereby the value of average dispersion in the span is reduced to a value .ltoreq.4 ps/nm-km, and in which substantially all fiber lengths defining the portion of the span have absolute values of dispersion of the same order of magnitude.
- 2. System of claim 1 which the length of the span is .gtoreq.300 km.
- 3. System of claim 1 in which spacing of adjacent channel carriers is <2.5 nm.
Parent Case Info
This is a division of application Ser. No. 08/069952, filed May 28, 1993, now U.S. Pat. No. 5,581,830.
US Referenced Citations (11)
Foreign Referenced Citations (1)
Number |
Date |
Country |
A-2 681 745 |
Sep 1991 |
FRX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
69952 |
May 1993 |
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