Short pulsed IR fiber laser at wavelength > 2 μm
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United States of America Patent
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Feb 14, 2017
Grant Date -
Jul 25, 2013
app pub date -
Jan 16, 2013
filing date -
Jan 19, 2012
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Abstract
A method of generating ultrashort pulses with wavelengths greater than 2 μm comprising a short pulse diode laser or fiber laser operating at a wavelength of 1 μm or greater with a pulse width of 10 ps or greater, one or more amplification stages to increase the peak power of the pulsed source, a nonlinear fiber stage whereby the dispersion of the nonlinear fiber is anomalous at the pulsed source wavelength such that the fiber breaks up the pulse into a series of sub-ps pulse train through modulation instability which may be seeded by spontaneous noise which are then wavelength shifted in one or more stages by soliton self frequency shift in anomalous dispersion fiber or Raman in normal dispersion fiber and amplified in one or more stages to generate a high peak power ultrashort pulse (<1 ps) source at a wavelength of 2.4 μm or greater.
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