Journal
APL PHOTONICS
Volume 4, Issue 2, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.5044659
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Funding
- Office of Naval Research (ONR) [MURI N00014-17-1-2588]
- National Science Foundation (NSF) [ECCS-1711230]
- HEL-JTO [W911NF-12-1-0450]
- Army Research Office (ARO) [W911NF-12-1-0450]
- Air Force Office of Scientific Research (AFOSR) [FA955015-10041]
- Qatar National Research Fund (QNRF) [NPRP9-020-1-006]
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We provide a systematic analysis of geometric parametric instabilities in nonlinear graded-index multimode fibers. Our approach implicitly accounts for self-focusing effects and considers dispersion processes to all orders. It is shown that the resulting parametric problem takes the form of a Hill's equation that can be systematically addressed using a Floquet approach. The theory developed indicates that the unstable spectral domains associated with such geometric parametric instabilities can be significantly altered as the power levels injected in a parabolic multimode fiber increase. These predictions are in excellent agreement with experimental data gathered from graded-index multimode structures. (C) 2018 Author(s).
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