Optical: systems and elements – Optical amplifier – Optical fiber
Patent
1997-12-02
1999-07-27
Moskowitz, Nelson
Optical: systems and elements
Optical amplifier
Optical fiber
359161, 372 6, 372 71, 372 75, H01S 306, G02B 626
Patent
active
059300299
ABSTRACT:
An optical fiber amplifier having a doped fiber, through which an input signal propagates, is bi-directionally pumped in a manner that provides for a desired composite absorption profile such as, in one case, a uniform degree of local pump energy absorbed along at least a substantial length of the fiber. Co-propagating and a counter-propagating pump sources are prescribed to have their wavelengths selected relative to the peak absorption wavelength of the amplifier to provide for a uniform composite absorption profile across the length of the fiber thereby improving the overall inversion efficiency of the amplifier as well as providing for reduced amplifier noise figure.
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Carothers, Jr. W. Douglas
Moskowitz Nelson
SDL Inc.
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