Method and apparatus for suppression of stimulated brillouin scattering using polarization control with a birefringent delay element
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United States of America Patent
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Mar 31, 2015
Grant Date -
Mar 14, 2013
app pub date -
Sep 8, 2011
filing date -
Sep 8, 2011
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Abstract
A method and apparatus for suppression of stimulated Brillouin scattering (SBS) includes a master oscillator (MO) that generates a beam; a birefringent element that receives and transmits the beam, wherein the beam is transmitted with a transmission delay between two orthogonal axes; a polarization controller that receives the beam and transmits the beam with a desired polarization; a fiber amplifier that receives the beam, amplifies the beam, and transmits a beam; a compensating birefringent element that receives the beam, approximately removes the transmission delay between the two axes of the beam, and transmits an output beam; and a polarization detector that detects the output beam's polarization and provides feedback to the polarization controller to ensure that the polarization of the output beam is approximately equal to a desired output polarization, so as to reduce SBS.
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