Optical amplifiers

Details Optical amplifiers Optical amplifiers

2006-06-13

2006-06-13

Hellner, Mark (Department: 3663)

Optical: systems and elements

Optical amplifier

Optical fiber

C385S088000

Reexamination Certificate

active

07061667

ABSTRACT:
An L-band EDFA may have three amplifier stages. In the first stage, a high power 980 nm laser is used to generate C-band ASE noise which is used to pump the erbium doped fiber of the second stage. The second stage fiber is arranged as a plug-in module which connects between a first stage isolator and a mid-stage loss between the second and third stages. The desired gain of the amplifier is obtained by selecting a plug-in module with a length of fiber that will give the desired amplifier output power for a given input power.

REFERENCES:
patent: 6222670 (2001-04-01), Ryu et al.
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patent: WO 00/24094 (2000-04-01), None

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