Spectrally flat and broadband doublepumped fiber optical parametric amplifiers

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

Spectrally flat and broadband doublepumped fiber optical parametric amplifiers

Optics 2026-08-06 v1

Authors: J. M. Chavez Boggio , J. D. Marconi , S. R. Bickham , H. L. Fragnito

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 $115\text{ nm}$ .

Keywords

fiber optical parametric amplifier double-pumped gain flatness broadband dispersion shifted fiber highly nonlinear fiber fourth-order dispersion

Cite

@article{arxiv.2608.05652,
  title  = {Spectrally flat and broadband doublepumped fiber optical parametric amplifiers},
  author = {J. M. Chavez Boggio and J. D. Marconi and S. R. Bickham and H. L. Fragnito},
  journal= {arXiv preprint arXiv:2608.05652},
  year   = {2026}
}