机构地区: 广东工业大学信息工程学院
出 处: 《光通信技术》 2010年第10期25-27,共3页
摘 要: 提出了基于光纤Bragg光栅(FBG)的用于无线激光通信系统的滤光方案,采用耦合模理论分析了FBG的传输特性,用龙格-库塔法对光纤光栅进行了计算机数值仿真,设计了工作在850nm波长的超窄带光纤光栅滤光器的参数。仿真结果表明,此滤光器可以达到很窄的带宽(0.03nm)、很高的峰值反射率(接近100%)和光滑、抑制边带的反射谱。 An light filtering scheme based on fiber Bragg grating (FBG) is presented,which is to be used in free space optical communication system. The transmission characteristics of FBG are analyzed in coupled mode theory, and the reflectivity spectra of FBG are simulated with Runge-Kutta method. In emphasis, the parameters of the FBG light filter working with 850nm Bragg wavelength are designed. The simulation results showed that ultra-narrow bandwidth (0.03nm) ,high reflectivity(nearly 100%) and restrained side lobe can be achieved.