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arXiv · 2608.05652

Spectrally flat and broadband doublepumped fiber optical parametric amplifiers

J. M. Chavez Boggio·J. D. Marconi·S. R. Bickham·H. L. Fragnito
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Abstract

We study theoretically and experimentally spectrally flat and broadband double-pumped fiber-optical parametric amplifiers (2P-FOPAs). Closed formulas are derived for the gain ripple in 2P-FOPAs as a function of the pump wavelength separation and power, and the fiber non-linearity and fourth order dispersion coefficients. The impact of longitudinal random variations of the zero dispersion wavelength $\lambda_0$ on the gain flatness is investigated. Our theoretical findings are substantiated with experiments using conventional dispersion shifted fibers and highly nonlinear fibers (HNLFs). By using a HNLF having a low variation of $\lambda_0$ we demonstrate high gain and flat spectrum ($25 \pm 1.5\text{ dB}$) over $115\text{ nm}$.

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J. M. Chavez Boggio, J. D. Marconi, S. R. Bickham, H. L. Fragnito. 2026-08-06. Spectrally flat and broadband doublepumped fiber optical parametric amplifiers. https://arxiv.org/abs/2608.05652

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