Institut für Hochfrequenztechnik, Hochschule für Telekommunikation Leipzig, Gustav-Freytag-Strasse 43-45, 04277 Leipzig, Germany. stefan.preuszler@hft‑leipzig.de
Opt Lett. 2012 Oct 1;37(19):4122-4. doi: 10.1364/OL.37.004122.
We investigate the gain bandwidth of stimulated Brillouin scattering (SBS) in multistage systems. As we will show, the bandwidth is reduced significantly by the number of stages, which can increase the distortions in cascaded slow-light systems, for instance. However, other applications, which are limited by the minimum bandwidth achievable with SBS, can benefit from the reduced bandwidth. Since the peak value of the SBS gain spectrum is not reduced by this method, the reduced bandwidth can drastically enhance the performance of many different applications, such as the quasi-light storage (QLS). The minimum bandwidth of 10.3 MHz for a one-stage system was reduced down to 5.8 MHz for three stages. With this reduced bandwidth, we achieved a storage time advancement of the QLS method by 60%.
我们研究了多程系统中受激布里渊散射（SBS）的带宽增益。我们将展示，带宽会因程数的增加而显著减小，这可能会增加级联慢光系统中的失真，例如。然而，其他应用，如受 SBS 可实现的最小带宽限制的应用，可以受益于带宽的减小。由于该方法不会减小 SBS 增益谱的峰值，因此减小带宽可以极大地提高许多不同应用的性能，例如准光存储（QLS）。对于单程系统，10.3 MHz 的最小带宽降低到了 3 程系统的 5.8 MHz。通过这种减小的带宽，我们使 QLS 方法的存储时间延长了 60%。
