Low power consumption and continuously tunable all-optical microwave filter based on an opto-mechanical microring resonator.
Low power consumption and continuously tunable all-optical microwave filter based on an opto-mechanical microring resonator.
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DOI：
10.1364/oe.25.000960
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发表时间：
2017-01
期刊：
影响因子：
3.8
通讯作者：
Li Liu;Yuen-Ren Yang;Zhihua Li;Xing Jin;W. Mo;Xing Liu
中科院分区：
文献类型：
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作者：
Li Liu;Yuen-Ren Yang;Zhihua Li;Xing Jin;W. Mo;Xing Liu
我们提出并实验证明了一个连续可调谐全光微波滤波器使用硅光机械微谐振器（MRR）。通过对亚毫瓦级泵浦光的精细调节，利用光机械效应和热光效应等非线性效应，可以使MRR的透射谱连续移动。因此，在光单边带（OSSB）调制的情况下，可以灵活地控制光载波（靠近一个MRR谐振）与相应谐振之间的频率间隔，这是实现连续可调谐微波光子滤波器（MPF）的关键因素。实验中，在泵浦功率小于-2.5dBm的情况下，MPF的中心频率可在6 ~ 19 GHz范围内连续调谐。提出的光机械装置是胜任处理微波信号的主导优势，如紧凑的足迹，全光控制和低功耗。在未来的微波系统中，利用光来控制光，这种硅基光机械结构可能会有许多潜在的应用，如微波开关。
We propose and experimentally demonstrate a continuously tunable all-optical microwave filter using a silicon opto-mechanical microring resonator (MRR). By finely adjusting the pump light with submilliwatt power level, transmission spectrum of the MRR could be continuously shifted based on the nonlinear effects, including the opto-mechanical effect and thermo-optic effect. Therefore, in the case of optical single sideband (OSSB) modulation, the frequency intervals between the optical carrier (near one MRR resonance) and the corresponding resonance could be flexibly manipulated, which is the critical factor to achieve continuously tunable microwave photonic filter (MPF). In the experiment, the central frequency of the MPF could be continuously tuned from 6 GHz to 19 GHz with the pump power lower than -2.5 dBm. The proposed opto-mechanical device is competent to process microwave signals with dominant advantages, such as compact footprint, all-optical control and low power consumption. In the future, using light to control light, the opto-mechanical structure on silicon platforms might have many other potential applications in microwave systems, such as microwave switch.