Photonics Research Group, Aston University, Birmingham, UK.
Opt Lett. 2012 Feb 1;37(3):353-5. doi: 10.1364/OL.37.000353.
We report all-fiber polarization interference filters, known as Lyot and Lyot-Őhman filters, based on alternative concatenation of UV-inscribed fiber gratings with structure tilted at 45° and polarization maintaining (PM) fiber cavities. Such filters generate comb-like transmission of linear polarization output. The free spectral range (FSR) of a single-stage (Lyot) filter is PM fiber cavity length dependent, as a 20 cm long cavity showed a 26.6 nm FSR while the 40 cm one exhibited a 14.8 nm FSR. Furthermore, we have theoretically and experimentally demonstrated all-fiber 2-stage and 3-stage Lyot-Őhman filters, giving more freedom in tailoring the transmission characteristics.
我们报告了全光纤偏振干涉滤波器，也称为 Lyot 和 Lyot-Őhman 滤波器，它基于 UV 写入光纤光栅与结构倾斜 45°的偏振保持 (PM) 光纤腔的交替级联。这种滤波器产生类似梳状的线性偏振输出传输。单级 (Lyot) 滤波器的自由光谱范围 (FSR)取决于 PM 光纤腔的长度，20 cm 长的腔显示出 26.6nm 的 FSR，而 40 cm 长的腔则显示出 14.8nm 的 FSR。此外，我们还从理论和实验上演示了全光纤 2 级和 3 级 Lyot-Őhman 滤波器，为调整传输特性提供了更多的自由度。
