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Stimulated Brillouin Scattering Suppression With a Chirped Laser Seed: Comparison of Dynamical Model to Experimental Data

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7 Author(s)
Petersen, E. ; U.S. Army Res. Lab., Adelphi, MD, USA ; Zhi Yi Yang ; Satyan, N. ; Vasilyev, A.
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A numerical model is developed to simulate stimulated Brillouin scattering (SBS) in high power single-mode fiber amplifiers. The time dependent model incorporates both laser and Stokes wave amplification and initiates the Brillouin scattering from thermal phonons. A frequency chirped laser is used as the seed to suppress SBS. Experiments with Yb-doped fiber amplifiers show good agreement with the modeling. Using experimentally determined parameters, the model is used to predict chirp requirements for multi-kilowatt amplifiers with tens of meters of delivery fiber. A comparison is made between a chirped seed source and random phase modulation for SBS suppression.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:49 ,  Issue: 12 )

Date of Publication:

Dec. 2013

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