Gain flattening optical filter, optical amplifier comprising such an optical filter and method for manufacturing such an optical filter
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United States of America Patent
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Dec 21, 2004
Grant Date -
Mar 27, 2003
app pub date -
Sep 5, 2002
filing date -
Sep 7, 2001
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Abstract
An optical signal amplification device (200) comprises an optical amplifier (210) having a wavelength-dependent gain and an equalization device (100) optically coupled in series to the optical amplifier and having a wavelength-dependent transmission function that substantially equalize the gain of the optical amplifier, the equalization device comprising a waveguide Bragg grating having a substantially constant refractive index envelope and a chirp rate that varies in such a way as to obtain the wavelength-dependent transmission function.
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