A widely tunable microwave photonic （MWP） notch filter with high linearity based on a dual-parallel Mach- Zehnder modulator （DPMZM） is proposed and experimentally demonstrated. The motivation of this work lies in ...A widely tunable microwave photonic （MWP） notch filter with high linearity based on a dual-parallel Mach- Zehnder modulator （DPMZM） is proposed and experimentally demonstrated. The motivation of this work lies in the fact that the MWP notch filter previously reported has nonlinear distortions generally induced by the nonlinear property of electro-optic devices. In this scheme, even-order modulated sidebands at the DPMZM output are effectively suppressed by properly adjusting bias voltages of the DPMZM, which are the dominant factor to induce the nonlinear distortions into the MWP notch filter. The proposed scheme is theoretically analyzed and experimentally verified.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos 61335004 and 61275031the High-Tech Research and Development Program of China under Grant No 2013AA014401
文摘A widely tunable microwave photonic （MWP） notch filter with high linearity based on a dual-parallel Mach- Zehnder modulator （DPMZM） is proposed and experimentally demonstrated. The motivation of this work lies in the fact that the MWP notch filter previously reported has nonlinear distortions generally induced by the nonlinear property of electro-optic devices. In this scheme, even-order modulated sidebands at the DPMZM output are effectively suppressed by properly adjusting bias voltages of the DPMZM, which are the dominant factor to induce the nonlinear distortions into the MWP notch filter. The proposed scheme is theoretically analyzed and experimentally verified.
