All-fiber tunable microwave photonic filter based on a cladding-mode coupler

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Original languageEnglish
Article number5491069
Pages (from-to)1241-1243
Journal / PublicationIEEE Photonics Technology Letters
Issue number16
Publication statusPublished - 2010


We demonstrate an all-fiber tunable microwave photonic filter based on the configuration of a MachZehnder interferometer, which employs two fixed widely separated wavelengths and a cladding-mode coupler formed with a pair of matching long-period fiber gratings to provide continuous tuning of the time-delay difference between the two arms of the interferometer. The filter provides stable coherence-free operation and a free spectral range that can be tuned continuously and precisely over a wide range. © 2006 IEEE.

Research Area(s)

  • Microwave photonics, notch filters, optical fiber delay lines, optical signal processing, tunable filters