By Topic

An Electrically Tunable Polarizer for a Fiber System Based on a Polarization-Dependent Beam Size Derived From a Liquid Crystal Lens

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

The purchase and pricing options are temporarily unavailable. Please try again later.
5 Author(s)
Michael Chen ; Dept. of Photonics, Nat. Chiao Tung Univ., Hsinchu, Taiwan ; Chyong-Hua Chen ; Yinchieh Lai ; Yan-qing Lu
more authors

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 polarization-dependent 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 fiber-optic sensing devices and polarization-sensitive optical instruments.

Operation of the electrically variable polarizer based on the polarization-dependent beam size using a LC lens for o-ray and e-ray incidences. Operation of the electrically variable polarizer based on the polarization-dependent beam size using a LC lens for o-ray and e-ray incidences.

Published in:

IEEE Photonics Journal  (Volume:6 ,  Issue: 3 )