Discrete amplification of an optical signal

Optical: systems and elements – Optical amplifier – Raman or brillouin process

Reexamination Certificate

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C359S337500

Reexamination Certificate

active

06876488

ABSTRACT:
A discrete optical amplifier system is disclosed comprising a Dispersion Compensating Fiber (DCF), a first order pump system, and a second order pump system. The first order pump system is set to a first power and is configured to backward pump onto the DCF. The second order pump system is set to a second power and is configured to forward pump onto the DCF. One or both of the first power and the second power are set based on a power ratio. The first and second pump systems generate a gain in an optical signal traveling on the DCF. The power ratio, the first power, and the second power are set to generate a low noise figure for the gain in the optical signal, and are set to distribute the gain along the DCF to reduce fiber non-linearities affecting the optical signal while traveling over the DCF.

REFERENCES:
Rottwitt, Karsten, Stentz, Andrew, Nielsen, Torben, Hansen, Per, Feder, Kenneth, and Walker, Kenneth, “Transparent 80 km Bi-Directionally Pumped Distributed Raman Amplifier with Second Order Pumping,” ECOC'99, Oct. 26-30, 1999, Nice, France.
Dominic, Vince, Mathur, Atul, and Ziari, Mehrdad, “Second-order distributed Raman amplification with a high-power 1370 nm laser diode,” OMC6-1, CAA 2001.

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