All-fiber wavelength-tunable and mode convertible bandpass filter for optical interconnections

W. Shin, K. Oh, B. A. Yu, Y. L. Lee, Y. C. Noh, D. K. Ko, J. Lee

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


We report an all-fiber wavelength-tunable bandpass filter with multimode to single-mode converting property via serially concatenated structure of a helicoidal long-period fiber grating (HLPFG), a ring-core hollow optical fiber (HOF), and a multimode fiber (MMF). After passing the cascaded HLPFG-ring core HOFMMF, the bandpass filtering characteristic and the mode conversion between multimode and single-mode were realized at the resonant wavelength of the HLPFG. Due to the novel spectral functionality of the HLPFGfor directional torsion to the helix, the proposed device also showed wavelength-tunable bandpass filtering operation with low polarization-dependent loss.

Original languageEnglish
Pages (from-to)404-406
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number6
Publication statusPublished - 2008 Mar 15

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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