Acoustooptic tunable gap-type bandpass filter with a broad stopband

Y. Jung, S. B. Lee, B. H. Lee, K. Oh

Research output: Contribution to journalArticle

1 Citation (Scopus)


We demonstrate a novel all-fiber gap-type tunable bandpass filter configuration that consists of a broadband hollow optical fiber (HOF) acoustooptic tunable filter (AOTF) concatenated with a narrowband single-mode fiber (SMF)-AOTF. Owing to the unique mode coupling properties of HOF-AOTF and SMF-AOTF, a narrow passband channel of a full-width at half-maximum (FWHM) of ∼4 nm could be formed in a broad stopband platform of a 90-nm FWHM successfully. In this scheme, the center wavelength and rejection efficiency of both passband and stopband were found to be flexibly tunable by adjusting the frequency and the voltage of radio-frequency signals applied to individual acoustic transducers.

Original languageEnglish
Pages (from-to)1331-1333
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number17
Publication statusPublished - 2007 Sep 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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