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1 April 2022 Generalized theory of SBS in multimode fiber amplifiers
Kabish Wisal, Stephen C. Warren-Smith, Chun-Wei Chen, Ryan Behunin, Hui Cao, A. Douglas Stone
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Proceedings Volume PC11995, Physics and Simulation of Optoelectronic Devices XXX; PC1199504 (2022) https://doi.org/10.1117/12.2608336
Event: SPIE OPTO, 2022, San Francisco, California, United States
Abstract
Stimulated Brillouin Scattering (SBS) provides a major limitation on power scaling in high power fiber lasers and amplifiers. Using wavefront shaping in highly multimode fibers provides a promising avenue to suppress SBS while maintaining good beam quality. We present here a generalized theory for SBS in multimode fiber amplifiers. We find the Stokes susceptibility in terms of eigenmode expansions of the vector optical and acoustic wave equations. An analytical form of the relevant gain matrix is obtained in terms of modal overlap integrals. We will discuss wavefront shaping strategies to suppress SBS based on the properties of the gain matrix.
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Kabish Wisal, Stephen C. Warren-Smith, Chun-Wei Chen, Ryan Behunin, Hui Cao, and A. Douglas Stone "Generalized theory of SBS in multimode fiber amplifiers", Proc. SPIE PC11995, Physics and Simulation of Optoelectronic Devices XXX, PC1199504 (1 April 2022); https://doi.org/10.1117/12.2608336
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KEYWORDS
Acoustics
Fiber amplifiers
Multimode fibers
Optical amplifiers
Nonlinear optics
Electrostriction
Modes of laser operation
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