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Proceedings Paper

Stimulated Raman scattering mitigation through amplified spontaneous emission simultaneous seeding on high power double-clad fiber pulse amplifiers
Author(s): M. Melo; J. M. Sousa; M. O. Berendt
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Paper Abstract

Evolution of stimulated Raman scattering (SRS) with simultaneous seeding of amplified spontaneous emission (ASE) and signal pulse on a forward pumped high power Ytterbium-doped double-clad fiber amplifier is studied. A cascaded amplifier chain configuration is used for the study. It is shown that the generated Raman-stokes pulses occur together with the signal pulse causing optical output signal pulse distortions. It is also experimentally demonstrated that increasing the ASE seeded power the energy contained in the first-order Stokes Raman pulse can be significantly reduced. The seeded ASE changes the gain dynamics of the high power amplifier stage, reducing SRS and having a strong impact on the enabled extracted energy within the signal pulse. The signal and Raman spectral components are discriminated and the temporal evolution of each component for different input ASE power levels is analyzed individually. Quantitative results of the energy transferred from the signal to the Raman pulse can in this way be accurately obtained.

Paper Details

Date Published: 10 February 2011
PDF: 6 pages
Proc. SPIE 7914, Fiber Lasers VIII: Technology, Systems, and Applications, 79142N (10 February 2011); doi: 10.1117/12.875297
Show Author Affiliations
M. Melo, Multiwave Photonics S.A. (Portugal)
J. M. Sousa, Multiwave Photonics S.A. (Portugal)
M. O. Berendt, Multiwave Photonics S.A. (Portugal)

Published in SPIE Proceedings Vol. 7914:
Fiber Lasers VIII: Technology, Systems, and Applications
Jay W. Dawson, Editor(s)

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