Lightwave transmission system employing raman and rare-earth dop

Details Lightwave transmission system employing raman and rare-earth dop Lightwave transmission system employing raman and rare-earth dop

1997-09-25

2000-03-14

Ngo, Hung N.

Optical waveguides

With optical coupler

Plural

359161, 359173, G02B 628

Patent

active

060383569

ABSTRACT:
A method is provided for transmitting an optical signal in an optical communication system. The system includes a transmitter for generating the optical signal, a receiver for detecting the signal, and an optical fiber communication link interposed between the transmitter and receiver. The optical fiber communication link includes transmission optical fibers concatenated with a plurality of Raman amplifiers and at least one rare earth doped optical fiber amplifier. The method includes the steps of: amplifying the optical signal as it advances through each of the plurality of Raman amplifiers; and compensating for variations in transmission path losses to restore the optical signal to a nominal power level as it advances through the rare earth doped optical fiber amplifier by maintaining the doped optical fiber amplifier in its saturated state.

REFERENCES:
patent: 5905825 (1999-05-01), Brindel et al.
patent: 5943147 (1999-08-01), Vanoli et al.
patent: 5946117 (1999-08-01), Meli et al.

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