| 2 | Characteristics of a Tunable Microwave Photonics Notch Filter Based on Two Fiber Bragg Gratings显示文摘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. | YUXianbin ZHANGXianmin CHIHao CHENKangsheng | 2005 | Chinese Journal of Electronics2005，14，1： | 0 |
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