非均匀色散光纤参量放大器中泵浦相位调制与泵浦相对强度噪声（RIN）导致的Q penalties
Q penalties due to pump phase modulation and pump RIN in fiber optic parametric amplifiers with non-uniform dispersion
AI总结：
本文实验结合数值探究非均匀色散FOPAs中，泵浦相位调制与RIN导致的Q penalty，发现λ₀变化可大幅降低两类 penalty，泵浦相位调制的 penalty 还可通过极短光纤与极低色散斜率消除。
AI中文摘要：
本文针对单泵浦与双泵浦光纤光学参量放大器（FOPAs）中，由泵浦相位调制和泵浦相对强度噪声（RIN）引起的品质因数劣化量（ΔQ），开展实验与数值研究。这些 penalty 针对零色散波长（λ₀）沿光纤为恒定值和随机变化的光纤构建的FOPAs进行探究。研究表明，均匀光纤（λ₀恒定）中泵浦相位调制会产生显著的Q penalty，而λ₀变化的光纤中，单泵浦与双泵浦FOPAs的此类 penalty 可大幅降低；在极短光纤（长度L<0.1km）和极低色散斜率S₀<0.002ps·nm⁻²·km⁻¹构成的FOPAs中，泵浦相位调制导致的Q penalty 趋于消失。对于典型FOPA参数，泵浦RIN导致的Q penalty 远小于泵浦相位调制的，在非均匀光纤（λ₀变化）中同样会降低，但该 penalty 不依赖光纤长度或色散斜率。
英文摘要：
We present an experimental and numerical investigation of the quality factor degradation ($ΔQ$) 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 ($λ_0$) along the fiber. We show that pump phase modulation in uniform fibers (constant $λ_0$) produces large $Q$ penalties, while in fibers with variations of $λ_0$, 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 $λ_0$), but do not depend on fiber length nor on fiber dispersion slope.
