High Q microwave filter using incoherent, continuous-wave supercontinuum and dispersion-profiled fiber

You Min Chang, Haeyang Chung, Ju Han Lee

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

We experimentally demonstrate the combined use of an ultrabroadband, incoherent, continuous-wave (CW) supercontinuum (SC) and a dispersion-profiled fiber to implement a photonic microwave filter with a Q -factor as high as 140. In our scheme based on spectrum slicing, such a high Q -factor can be readily achieved due to the following two reasons. The Q -factor restriction due to the limited wavelength tap number caused by narrow spectral bandwidth of conventional optical broadband sources can readily be solved owing to the ultrabroad bandwidth of the CW SC source. Second, the delay medium based on dispersion-profiled fiber compensates the nonuniform relative time delay between each wavelength filter tap caused by inherent wavelength chirping of conventional frequency domain multichannel comb filters. A fiber dispersion profile is provided for the nonuniform relative time delay compensation.

Original languageEnglish
Pages (from-to)2042-2044
Number of pages3
JournalIEEE Photonics Technology Letters
Volume19
Issue number24
DOIs
StatePublished - 15 Dec 2007

Keywords

  • Microwave filters
  • Microwave photonics
  • Optical comb filters
  • Optical fibers
  • Supercontinuum (SC)

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