Cascaded fiber Sagnac loop-based microwave photonic multiband bandpass filter with a selectable passband frequency

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A passband frequency-electable microwave photonic multiband bandpass filter based on a cascaded fiber Sagnac loop is presented and experimentally demonstrated. A broadband light is sliced by the cascaded fiber Sagnac loop, which serves as a spectrum slicer. After broadband light passes through the spectrum slicer, the sliced broadband light will have the varied periodical spectral characteristics that will cause a transmitted spectral distribution with uniform or multiple periods, then will be modulated by an optical phase modulator and delayed by a dispersive medium. Therefore, a frequency-band-selectable microwave photonic multiband bandpass filter with a suppressed baseband is achieved that can be switched between the single-passband, dual-passband, and triple-passband state. The presented filter exhibits a maximal out-of-band rejection ratio of about 30 dB.
Publisher
CHINESE LASER PRESS
Issue Date
2017-11
Language
English
Article Type
Article
Keywords

MACH-ZEHNDER INTERFEROMETER; PHASE MODULATION

Citation

CHINESE OPTICS LETTERS, v.15, no.11

ISSN
1671-7694
DOI
10.3788/COL201715.110603
URI
http://hdl.handle.net/10203/227503
Appears in Collection
EE-Journal Papers(저널논문)
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