A continuously tunable microwave photonic notch filter with complex coefficient based on phase modulation

Xu, Dongdong; Cao, Ye; Tong, Zhengrong; Yang, Jing-peng

doi:10.1007/s11801-017-6207-6

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2021

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“…Complex-coefficient filters are able to keep the FSR and shape unchanged while tuning the center frequency, so they have the most potential for applications among the MPFs with different coefficients. Many MPFs with complex coefficients have been reported [2][3][4][5][6] including those based on SSB modulation [2], stimulated Brillouin scattering (SBS) [3], fiber Bragg grating (FBG) [4], programmable photonic processor [5]. However, the problem of bias drift is existed in the scheme based on SSB modulator.…”

Section: Introductionmentioning

confidence: 99%

Complex-Coefficient Microwave Photonic Filter Based on Orthogonally Polarized Optical Single-Sideband Modulation

Qian

Sun

et al. 2021

Proceedings of CECNet 2021

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A complex-coefficient microwave photonic filter with continuous tunability is proposed and experimentally demonstrated. The filter taps are based on a 360° tunable microwave photonic phase shifter, which is realized by orthogonally polarized optical single-sideband (OSSB) modulation. The experimental results are shown and regarded as good performance for the proposed filter. The phase shift for the two taps covers a full 360° range from 8 GHz to 26 GHz. Frequency responses with different center frequency are measured within 20–21 GHz with the full free spectral ranges (FSRs) of 185 MHz and 285 MHz, respectively.

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