Tunable microwave filter that uses a high-birefringent fiber and a differential-group-delay element

G. X. Ning, S. Aditya, P. Shum, N. Liu, Y. D. Gong, Chao Lu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)


We propose and experimentally demonstrate a novel and simple photonic microwave notch filter that uses a high-birefringent fiber that gives a fixed differential group delay (DGD), together with a DGD element that gives a tunable DGD. This configuration overcomes the problems of optical coherence interference and chromatic dispersion, which may occur in schemes that use fiber delay lines or fiber gratings. Also presented is a theoretical analysis for the performance of the microwave filter that uses the present configuration. The present scheme provides a continuous tuning capability for changing the notch frequency. Measured notch rejection is greater than 40 dB. This scheme can operate over a wide wavelength range of the optical carrier. There is good agreement between experiment results and theoretical analysis.
Original languageEnglish
Pages (from-to)913-916
Number of pages4
JournalJournal of the Optical Society of America A: Optics and Image Science, and Vision
Issue number5
Publication statusPublished - 1 Jan 2005
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Computer Vision and Pattern Recognition

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