Tunable photonic microwave bandpass filter using phase modulation and a chirped fiber grating in a Sagnac loop

G. Ning, S. Aditya, P. Shum, L. H. Cheng, Y. D. Gong, Chao Lu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

17 Citations (Scopus)


We propose a novel all-optical microwave bandpass filter configuration, which uses phase modulation and a linearly chirped fiber grating in a Sagnac loop. The free spectral range (FSR) of the filter can be tuned continuously by tuning the grating. We also derive an expression for the filter transfer function. Calculated and measured results, which agree well, are presented to show a large notch rejection and an easily tunable FSR.
Original languageEnglish
Pages (from-to)1935-1937
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number9
Publication statusPublished - 1 Sep 2005
Externally publishedYes


  • Fiber Bragg grating (FBG)
  • Microwave photonics
  • Optical transversal filter

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics
  • Physics and Astronomy (miscellaneous)

Cite this