Title: Multistage optical amplifier
Application Number: 01101231 Application Date: 2001.01.08
Publication Number: 1308245 Publication Date: 2001.08.15
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G02F1/39
Applicant(s) Name: JDS Uniphase Address:
Inventor(s) Name: Bruce Niman
Attorney & Agent: yang guoxu
Abstract:
    A three-stage optical amplifier is disclosed having a first pre-amplifying stage for receiving an optical signal to be amplified and having a length of erbium doped fiber and a pump for providing energy to the erbium doped fiber. A second-stage is optically coupled to receive the optical signal from the first-stage after the optical signal has been pre-amplified. The second-stage a Raman amplifier has a length of standard or DCF optical fiber and a Raman pump for providing energy to the length of optical fiber for further amplifying the pre-amplified signal propagating therethrough and for controlling tilt of the amplified signal. A third stage EDFA for further amplifying the signal amplified by the Raman amplifier. Conveniently, the Raman stage is useful fo r both amplifying and providing tilt control.
Time: 10
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