Method for acquiring spectrum shape of a gain flattening filter in an optical amplifier
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United States of America Patent
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May 10, 2011
Grant Date -
Feb 26, 2009
app pub date -
Aug 21, 2008
filing date -
Aug 22, 2007
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Expired
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Abstract
Wherein Gain(λ) refers to the spectral function of gain, x is Δ′inv/Δinv which refers to change of population inversion level, and L′ is set as proportion of doped fiber length. Gain spectrums of the doped optical fiber with various fiber length can be acquired by measuring spectrum shapes at two gain point (H, L) of the doped optical fiber in invariable fiber length and applying change rule of gain spectrum of the doped optical fiber in different population inversion level, which improves the flexibility for design of amplifier.
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