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论文类型：期刊论文

发表时间：2015-12-15

发表刊物：JOURNAL OF LIGHTWAVE TECHNOLOGY

收录刊物：SCIE、EI、Scopus

卷号：33

期号：24

页面范围：5133-5139

ISSN号：0733-8724

关键字：Bandpass filter; bandstop filter; microwave photonic filter; phase-shifted fiber Bragg grating

摘要：A bandstop-to-bandpass microwave photonic filter (MPF) using a phase-shifted fiber Bragg grating (PS-FBG) and a dual-drive Mach-Zehnder modulator (DD-MZM) is proposed and experimentally demonstrated. The PS-FBG has an ultra-narrow notch in the reflection band. The DD-MZM is employed to generate a phase-modulated or a quasi-single-sideband (QSSB) optical signal by controlling the bias voltage. By applying the phase-modulated or QSSB signal to the PS-FBG to suppress one sideband, a bandpass or a bandstop MPF is implemented. The MPF can be continuously tuned from bandstop to bandpass or vice versa by controlling the bias voltage applied to the DD-MZM. The frequency tuning can be simply done by tuning the wavelength of the optical carrier. The proposed MPF is experimentally evaluated. Continuous tuning from a bandstop to bandpass filter with a bandstop rejection as high as 60 dB and frequency tuning with a frequency tunable range as large as 10 GHz are demonstrated.