Optical repeater having independently controllable...

Details Optical repeater having independently controllable... Optical repeater having independently controllable...

2005-10-18

2005-10-18

Hellner, Mark (Department: 3663)

Optical: systems and elements

Optical amplifier

Optical fiber

C398S173000

Reexamination Certificate

active

06956693

ABSTRACT:
An optical repeater includes: a first forward pumping coupler and a first backward pumping coupler inserted in an uplink optical fiber consecutively along the transfer direction of the optical signals therein; a second backward pumping coupler and a second forward pumping coupler inserted in a downlink optical fiber consecutively along the transfer direction of the optical signals therein; a first light source for supplying a pump light having a controlled power level to the first backward pumping coupler and the second forward pumping coupler; a second light source for supplying a pump light having a controlled power level to the first forward pumping coupler and the second backward pumping coupler. Each of the pumping couplers is a Raman amplifier.

REFERENCES:
patent: 5801878 (1998-09-01), Bourret et al.
patent: 6236777 (2001-05-01), Ravasio et al.
patent: 6768580 (2004-07-01), Okazaki
patent: 6894831 (2005-05-01), Shieh et al.
patent: WO 2004/019458 (2004-03-01), None

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