13 November 2014 Microwave photonic down-conversion based on phase modulation and Brillouin-assisted notch-filtering
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An improved Brillouin-assisted photonic microwave downconverter that features simple structure and wide frequency tunable range is experimentally demonstrated. In order to obtain higher conversion efficiency, SBS-assisted notch filter is used to suppress the carrier of phase modulated signal. Due to the SBS-assisted notch-filtering is generated by the phase modulated signal itself, which simplify the system structure effectively. Furthermore, the effective suppression of the carrier of phase modulated signal and the diminishment of the second-order Stokes wave could be achieved simultaneously by optimizing the attenuation of the variable optical attenuator, which guarantee our scheme can operate over a wide frequency range.
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Di Zheng, Di Zheng, Wei Pan, Wei Pan, Lianshan Yan, Lianshan Yan, Weili Zhang, Weili Zhang, Xihua Zou, Xihua Zou, Bin Luo, Bin Luo, Xinkai Liu, Xinkai Liu, "Microwave photonic down-conversion based on phase modulation and Brillouin-assisted notch-filtering", Proc. SPIE 9279, Real-time Photonic Measurements, Data Management, and Processing, 927914 (13 November 2014); doi: 10.1117/12.2071934; https://doi.org/10.1117/12.2071934

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