Electrically Controllable Long-Period Liquid Crystal Fiber Gratings

Yoonchan Jeong, Byungchoon Yang, Byoungho Lee, Hong Seok Seo, Sangsoo Choi, Kyunghwan Oh

Research output: Contribution to journalArticlepeer-review

55 Citations (Scopus)


An electrically controllable fiber-optic filter for broad-band rejection has been demonstrated by periodically poling a liquid-crystalline core in a hollow-core fiber by means of an external long-period-conibed electrode. The periodically poled liquid-crystalline core in a period of 483 μm couples the fundamental core mode to the leaky cladding modes. A maximum transmission loss dip of approximately 15-nm bandwidth and 6-dB band rejection has been obtained for a nonpolarized light with a combed 250-V external voltage modulation. The experimental result matches well with a numerical expectation, which has been analyzed by the discretized coupled-mode theory for an anisotropic perturbation.

Original languageEnglish
Pages (from-to)519-521
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number5
Publication statusPublished - 2000 May

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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