Opt Lett. 2018 Jun 1;43(11):2458-2461. doi: 10.1364/OL.43.002458.
Previous studies of the Faraday anomalous dispersion optical filter (FADOF) mainly focus on the weak signal light filtering, without regard for the influences of the signal light intensity on the filter itself. However, in some applications the signal light is strong enough to change the filter's performance. In this work, the influences of the signal light intensity on the transmittance spectrum is experimentally investigated in a 780 nm Rb85 FADOF in both the line-center and wings operation modes. The results show that the transmittance spectrum varies significantly with the signal light intensity. As the signal light increases, some existing transmittance peaks decline, some new transmittance peaks appear, and the maximum transmittance peak frequency may change. The spectrum in strong signal lights can be quite different from those calculated by programs in the condition of weak signal lights. These results are important for applications of the FADOF in the condition of strong signal lights.
先前关于法布里-珀罗反常色散滤光器（FADOF）的研究主要集中在对弱信号光的过滤上，而没有考虑信号光强度对滤波器本身的影响。然而，在某些应用中，信号光足够强，会改变滤波器的性能。在这项工作中，我们实验研究了在 780nm 的 Rb85 FADOF 中，在中心和翼部工作模式下，信号光强度对透过率谱的影响。结果表明，透过率谱随信号光强度的变化而显著变化。随着信号光的增加，一些现有的透过率峰值下降，一些新的透过率峰值出现，并且最大透过率峰值频率可能发生变化。在强信号光条件下的光谱与在弱信号光条件下的程序计算的光谱有很大的不同。这些结果对于 FADOF 在强信号光条件下的应用非常重要。
