Low-power all-optical microwave filter with tunable central frequency and bandwidth based on cascaded opto-mechanical microring resonators.
Low-power all-optical microwave filter with tunable central frequency and bandwidth based on cascaded opto-mechanical microring resonators.
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DOI：
10.1364/oe.25.017329
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发表时间：
2017-07
期刊：
影响因子：
3.8
通讯作者：
Li Liu;Zhi Chen;Xing Jin;Yuen-Ren Yang;Zhihua Yu;Jingjing Zhang;Lijun Zhang;Hong Wang
中科院分区：
文献类型：
--
作者：
Li Liu;Zhi Chen;Xing Jin;Yuen-Ren Yang;Zhihua Yu;Jingjing Zhang;Lijun Zhang;Hong Wang
提出并实验证明了一种基于两个级联硅光机械微环谐振器(MRR)的中心频率和带宽可调的全光微波滤光器。由于游标效应的影响，级联MRR的透射谱呈一系列的凹槽双峰分布。在利用光双边带(ODSB)信号进行强度调制的情况下，光载波固定在单槽双峰分布的两个共振峰之间。通过注入两个泵浦功率来控制上述两个共振红移，可以灵活地控制光载流子和两个共振之间的频率间隔，以用于可调谐微波加工。实验中，在所需的最大泵浦功率为1.65 mW和0.96 mW时，陷波微波光子滤光器(MPF)的中心频率和带宽可分别从5 GHz到36 GHz和6.7 GHz到10.3 GHz可调。该光机械器件能够处理微波信号，具有全光控制、体积小、调谐范围宽、功耗低等突出优点，在片上微波系统中具有重要的应用前景。
We propose and experimentally demonstrate an all-optical microwave filter with tunable central frequency and bandwidth based on two cascaded silicon opto-mechanical microring resonators (MRRs). Due to the Vernier effect, transmission spectrum of the cascaded MRRs is a series of notch bimodal distribution. In the case of intensity modulation with optical double-sideband (ODSB) signals, the optical carrier is fixed between the two resonant peaks of one notch bimodal distribution. By injecting two pump powers to control the above two resonance red-shifts based on the nonlinear effects in opto-mechanical MRRs, the frequency intervals between the optical carrier and the two resonances could be flexibly manipulated for tunable microwave processing. In the experiment, with the highest required pump powers of 1.65 mW and 0.96 mW, the central frequency and bandwidth of the notch microwave photonic filter (MPF) could be tuned from 5 GHz to 36 GHz and 6.7 GHz to 10.3 GHz, respectively. The proposed opto-mechanical device is competent to process microwave signals with dominant advantages of all-optical control, compact footprint, wide tuning range and low-power consumption, which has significant applications in on-chip microwave systems.