An Electrically Tunable Liquid Crystal Lens for Fiber Coupling and Variable Optical Attenuation
Michael Chen, Chyong-Hua Chen, Yin-Chieh Lai, and Yi-Hsin Lin*
Department of Photonics, National Chiao Tung University, Hsinchu, 30010, R O C, Taiwan
- *Corresponding Author:
- Yi-Hsin Lin
Department of Photonics
National Chiao Tung University
Hsinchu, 30010, R O C, Taiwan
E-mail: [email protected]
Received Date: February 07, 2014; Accepted Date: March 05, 2014; Published Date: March 07, 2014
Citation: Chen M, Chen CH, Lai YC, Lin YH (2014) An Electrically Tunable LiquidCrystal Lens for Fiber Coupling and Variable Optical Attenuation. J Electr Electron Syst 3:124. doi:10.4172/2332-0796.1000124
Copyright: © 2014 Chen M, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
An electrically tunable Liquid Crystal (LC) lens for both of fiber coupling and variable optical attenuation is demonstrated. The LC lens modulates the beam waist coupling to the fiber by electrically changing the lens power. When the modulated beam waist is close to the core size of the fiber, the LC lens is operated as a lens coupler. When the beam waist increases by reducing the lens power, the LC lens is operated as a Variable Optical Attenuator (VOA) as a result of the corresponding coupling coefficient variation of the transformed beam into a multimode fiber. The study provides a way to design an optical device for fiber coupling and variable optical attenuation based on electrically tunable focusing optical component.