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arXiv · 2608.06615

Q penalties due to pump phase modulation and pump RIN in fiber optic parametric amplifiers with non-uniform dispersion

J. M. Chavez Boggio·A. Guimaraes·F. A. Callegari·J. D. Marconi·H. L. Fragnito
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Abstract

We present an experimental and numerical investigation of the quality factor degradation ($\Delta Q$) due to pump phase modulation and pump relative intensity noise (RIN) in single- and double-pumped fiber optical parametric amplifiers (FOPAs). These penalties are investigated in FOPAs constructed with fibers having constant and randomly varying zero-dispersion wavelength ($\lambda_0$) along the fiber. We show that pump phase modulation in uniform fibers (constant $\lambda_0$) produces large $Q$ penalties, while in fibers with variations of $\lambda_0$, these penalties can be strongly reduced in both single- and double-pumped FOPAs. We also show that $Q$ penalties due to pump phase modulation tend to disappear in FOPAs made with very short fibers ($L<0.1~\mathrm{km}$) and very low dispersion slope $ S_0 < 0.002~ \mathrm{ps}\, \mathrm{nm}^{-2}\, \mathrm{km}^{-1}. $ The $Q$ penalties due to pump RIN, which for typical FOPA parameters are much smaller than those due to pump phase modulation, are also reduced in non-uniform fibers (varying $\lambda_0$), but do not depend on fiber length nor on fiber dispersion slope.

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J. M. Chavez Boggio, A. Guimaraes, F. A. Callegari, J. D. Marconi, H. L. Fragnito. 2026-08-06. Q penalties due to pump phase modulation and pump RIN in fiber optic parametric amplifiers with non-uniform dispersion. https://doi.org/10.1016/j.optcom.2005.01.056

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