High-gain operation of fiber lasers at long wavelengths
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United States of America Patent
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Oct 11, 2016
Grant Date -
Mar 31, 2016
app pub date -
Sep 2, 2015
filing date -
Sep 2, 2014
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Abstract
A method of operating a Tm:doped fiber amplifier including selecting a length of Tm:doped optical fiber to be less than one hundred meters, doping the optical fiber with active ions at a doping level of greater than one percent, optically pumping the doped optical fiber with a first laser beam having a wavelength longer than the wavelength where a maximum absorption cross section is provided by the active ions, and creating a population inversion between two active ion energy levels with the first laser beam, the active ions providing a gain to a second laser beam.
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