Electrically Controllable Long-Period Liquid Crystal Fiber Gratings

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

doi:10.1109/68.841272

Electrically Controllable Long-Period Liquid Crystal Fiber Gratings

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

Department of Physics

Research output: Contribution to journal › Article › peer-review

55 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	519-521
Number of pages	3
Journal	IEEE Photonics Technology Letters
Volume	12
Issue number	5
DOIs	https://doi.org/10.1109/68.841272
Publication status	Published - 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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10.1109/68.841272

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AU - Choi, Sangsoo

AU - Oh, Kyunghwan

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AB - 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.

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Electrically Controllable Long-Period Liquid Crystal Fiber Gratings

Abstract

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