Characteristics of a Tunable Microwave Photonics Notch Filter Based on Two Fiber Bragg Gratings

查看全文 作　　者：YUXianbin ZHANGXianmin CHIHao [1]CHENKangsheng 机构地区：[1]DepartmentofInformation&ElectronicEngineering,ZhejiangUniversity,Hangzhou310027,China 出　　处：《Chinese Journal of Electronics》索引2005年第14卷第1期,共3页 摘　　要：We investigate theoretically the characteristic of a tunable microwave fiber-optic notch flter based on two fiber gratings. The microwave frequency response based on the refiectivities of two fiber gratings is analyzed and the optimum filter condition is obtained. The refiectivity of the first fiber grating can be tuned experimentally by adjusting the wavelength of input light. Experimental results are in agreement with the theory. The largest notch depth is more than 15dB. The free-spectral range can be tuned by altering the length of fiber between two fiber gratings. 关 键 词：光纤BRAGG光栅 微波光子学 陷波滤波器 自由光谱区