Liquid-Crystal-Cladding Fiber Bragg Gratings with Electrically Controllable Polarization-Dependent Characteristics

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概要

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• An electrically controllable fiber Bragg grating (FBG) with polarization-dependent characteristics is described. The optic axis of a liquid crystal (LC) can be rearrangeable by means of external electric fields, which results in the change of an effective refractive index of an LC. The reflectivity and Bragg wavelength of an LC-cladding FBG can be controlled according to the refractive index of surrounding region of the fiber which is determined by the refractive index of the LC-cladding. The tuning ranges of the LC-cladding FBG were ${\sim}4.6$ dB of the reflectivity and ${\sim}0.3$ nm of Bragg wavelength based on unpolarized light, respectively, and polarization isolation of 1.5 dB was achieved at 100 Vp–p based on polarized light.

• 2006-05-15

著者

• Lee Sin-doo

  School Of Electric Engineering #32 Seoul National University

• Lee Byoungho

  School Of Electrical Engineering Seoul National University

• Na Jun-Hee

  School of Electrical Engineering #32, Seoul National University, Kwanak P.O. Box 34, Seoul 151-600, Korea

• Lee Sin-Doo

  School of Electrical Engineering, Seoul National University, Kwanak-Gu Shinlim-Dong, 151-744 Seoul, Korea

• Baek Seungin

  School of Electrical Engineering, Seoul National University, Kwanak-Gu Shinlim-Dong, 151-744 Seoul, Korea

• Roh Sookyoung

  School of Electrical Engineering, Seoul National University, Kwanak-Gu Shinlim-Dong, 151-744 Seoul, Korea

• Jeong Yoonchan

  Optoelectronics Research Centre, University of Southampton, Southampton SO7 1BJ, United Kingdom

• Jeong Cherlhyun

  School of Electrical Engineering, Seoul National University, Kwanak-Gu Shinlim-Dong, 151-744 Seoul, Korea

• Lee Byoungho

  School of Electrical Engineering, Seoul National University, Kwanak-Gu Shinlim-Dong, 151-744 Seoul, Korea

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