標題: An Electrically Tunable Polarizer for a Fiber System Based on a Polarization-Dependent Beam Size Derived From a Liquid Crystal Lens
作者: Chen, Michael
Chen, Chyong-Hua
Lai, Yinchieh
Lu, Yan-qing
Lin, Yi-Hsin
光電工程學系
Department of Photonics
關鍵字: Fiber-optic systems;liquid crystal lens;polarizers
公開日期: 1-Jun-2014
摘要: A broadband electrically tunable variable polarizer for fiber systems based on a liquid crystal lens is proposed and demonstrated. The polarization selectivity is based on a polarization-sensitive coupling efficiency to the fiber in the fiber system. For an incident ordinary ray, the output beam size remains the same as that of the incident beam, which results in low coupling efficiency. For an incident extraordinary ray (e-ray), the output beam size is close to the size of the fiber core, giving rise to high coupling efficiency because of the lens effect. Moreover, the output beam size of the e-ray can be electrically controlled, thus allowing the optical attenuation to be manipulated. In our experiments, the polarizationdependent loss from the visible to the near-infrared spectral region was approximately 12 dB. Such a broadband electrically variable polarizer may be applied to various designs for fiberoptic sensing devices and polarization-sensitive optical instruments.
URI: http://dx.doi.org/10.1109/JPHOT.2014.2319103
http://hdl.handle.net/11536/25096
ISSN: 1943-0655
DOI: 10.1109/JPHOT.2014.2319103
期刊: IEEE PHOTONICS JOURNAL
Volume: 6
Issue: 3
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結束頁: 
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