基于高双折射光纤环镜的可调谐光滤波器

为了得到具有全光纤结构和中心波长可调谐的光滤波器，采用3阶高双折射光纤环镜，提出了一种电磁力的悬臂调谐单元构成的新型可调谐光滤波器，对环镜传输过程和悬臂调谐单元原理进行了理论分析，通过控制悬臂调谐单元的输入电流，实现了滤波器通带的调谐。结果表明，该滤波器具有调谐灵活、输出光谱精细等特点，可应用于不同波长光波的选频输出。

Tunable optical filters based on high birefringence fiber loop mirrors

In order to realize an optical filter with all-fiber structure and tunable center wavelength, a novel tunable optical filter made of the third-order high birefringence fiber loop mirror and electromagnetic force based cantilever tuning unit was proposed. The transmission process of the loop mirror and the principle of the cantilever tuning unit were analyzed. The pass-band can be tuned by controlling the input current of the cantilever tuning unit. Thus it turns out that the filter possesses the characteristics of good tunability, fine output spectrum, etc.As a result, it can be used for selectively output of light-wave at different wavelengths.