Multi-stage optical fiber amplifier having high conversion efficiency
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United States of America Patent
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Aug 15, 2000
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app pub date -
Mar 11, 1998
filing date -
Mar 11, 1998
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Abstract
We have found that the conversion efficiency of a Er/Yb-doped cladding pumped fiber amplifier increases with increasing signal input power. Thus, preamplification of the input signal by means of an Er-doped fiber amplifier can result in increased conversion efficiency of the cladding pumped power amplifier. Such increased efficiency is desirable, lessening heat removal problems and/or facilitating increased reliability.
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