AI 中文总结
该研究通过理论推导与实验验证，优化双泵浦光纤光参量放大器，利用低λ₀波动的高非线性光纤，在115nm范围实现25±1.5dB的高平坦增益光谱。
AI 中文摘要
我们从理论和实验上研究了光谱平坦且宽带的双泵浦光纤光参量放大器（2P-FOPAs）。针对2P-FOPAs的增益纹波，推导了其随泵浦波长间隔、功率，以及光纤非线性和四阶色散系数变化的闭式公式。研究了零色散波长λ₀的纵向随机变化对增益平坦度的影响。我们使用常规色散位移光纤和高非线性光纤（HNLFs）进行实验，验证了理论结果。通过使用λ₀低变化的HNLF，我们在115纳米范围内实现了25±1.5分贝的高增益和平坦光谱。
英文摘要
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 $λ_0$ 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 $λ_0$ we demonstrate high gain and flat spectrum ($25 \pm 1.5\text{ dB}$) over $115\text{ nm}$.
