Upgradable, gain flattened fiber amplifiers for WDM applications
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United States of America Patent
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May 14, 2002
Issued Date -
N/A
app pub date -
Feb 28, 2001
filing date -
Feb 20, 1998
priority date (Note) -
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Abstract
A multistage optical fiber amplifier (OFA) system is designed to be upgraded with the addition of pump power when signal capacity of an optical communication link is correspondingly increased. The system includes a gain flattening filter (GFF) that remains valid when the system is upgraded because of the system design. Also disclosed are ways to enhance the GFF as well as control the channel signal gain tilt as well as adjust the external gain uniformity to be the same for an assembly line of OFA systems.
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