We experimentally find a practical stimulated Brillouin scattering (SBS) threshold for broadband high-performance fiber optical parametric devices relying on dispersion-stable GeO₂-doped silica highly nonlinear fibers. We demonstrate that SBS limits the nonlinear phase shift in such fibers to ~0.3 rad per pump unless the SBS is mitigated in some way. We consequently derive corresponding limits on signal gain and conversion efficiency and find the required SBS mitigation factor for a range of fiber optic parametric devices’ applications. Finally, we examine the level of SBS mitigation using air gaps and fiber tapers for implementation in polarization-insensitive fiber optic parametric devices employing bidirectional loops. We observe that an air gap or fiber taper are not very efficient for SBS mitigation as they provided an increase in SBS threshold up to 0.7 dB attributed primarily to their excess loss.

我们通过实验找到了一种实用的受激布里渊散射 (SBS) 阈值，用于依赖色散稳定的 GeO _{2 的}宽带高性能光纤参数设备掺杂二氧化硅高度非线性光纤。我们证明了 SBS 将此类光纤中的非线性相移限制为每泵约 0.3 rad，除非 SBS 以某种方式得到缓解。因此，我们推导出了信号增益和转换效率的相应限制，并为一系列光纤参数设备的应用找到了所需的 SBS 缓解因子。最后，我们研究了使用气隙和光纤锥度在采用双向环路的偏振不敏感光纤参数设备中实现的 SBS 缓解水平。我们观察到气隙或光纤锥度对于 SBS 缓解不是很有效，因为它们提供了高达 0.7 dB 的 SBS 阈值增加，这主要归因于它们的过度损耗。