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Microwave photonic filter based on circulating a cladding mode in a fiber ring resonator

机译:基于在光纤环形谐振器中循环包层模式的微波光子滤波器

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We propose a microwave photonic filter based on circulating a cladding mode in a fiber ring resonator, where the cladding mode is injected into and extracted from the resonator with a pair of matching long-period fiber gratings (LPFGs). The filter has a compact configuration and allows the frequency spacing and the notch depth to be tuned easily. The use of LPFGs also provides the capability of wavelength selection and tuning. Using a standard single-mode fiber and a pair of C O 2 laser-written LPFGs, we demonstrate a filter with a frequency spacing of ∼ 1.3   GHz and a notch depth of ∼ 17   dB . Our experimental results agree well with theoretical calculations.
机译:我们提出了一种基于在光纤环形谐振器中循环包层模式的微波光子滤波器,其中,通过一对匹配的长周期光纤光栅(LPFG)将包层模式注入谐振器或从谐振器中抽出。该滤波器结构紧凑,可以轻松调整频率间隔和陷波深度。 LPFG的使用还提供了波长选择和调谐的功能。我们使用标准的单模光纤和一对CO 2激光写入的LPFG,展示了一个频率间隔约为1.3 GHz,陷波深度约为17 17 dB的滤波器。我们的实验结果与理论计算非常吻合。

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