HIGH-POWER FIBER AMPLIFIER
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United States of America Patent
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Issued Date -
Sep 17, 2009
app pub date -
Jan 19, 2009
filing date -
Jan 17, 2008
priority date (Note) -
Abandoned
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Abstract
Fiber light amplifiers adapted for high power application are provided. In embodiments of the invention, the light signal to be amplified is coupled to a cladding mode of an active waveguide region which is cladding doped. The amplified light is coupled to an output fiber have waveguiding properties matching those of the active cladding of the active waveguide region. In other embodiments, two or more amplifying stages are provided coupled by a wavelength selective loss element which couples the Stokes wave co-propagating with the signal to be amplified out of the signal guiding mode prior to the onset of SRS.
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