Title :
Electrically Controllable Polarization Independent Two-Way Variable Optical Attenuator Based on Polymer-Stabilized Cholesteric Liquid Crystal
Author_Institution :
Inst. of Inf. Opt., Zhejiang Normal Univ., Jinhua, China
Abstract :
An electrically controllable two-way variable optical attenuator (VOA) has been demonstrated by sandwiching a /4 film between two polymer-stabilized cholesteric liquid crystal films. The VOA is polarization independent and both the reflectivity and transmittance are varied with the variation of the applied voltage. With the increase of the applied voltage, the transmittance is increased and the reflectivity is decreased. The maximum extinction ratio is -17 dB and -16.5 dB for the transmittance and reflection modes, respectively and the rising and decay time is around 2 ms and 15 ms, respectively.
Keywords :
Electric variables control; Liquid crystal polymers; Optical attenuators; Optical control; Optical films; Optical polarization; Optical polymers; Optical variables control; Polymer films; Reflectivity;
Conference_Titel :
Photonics and Optoelectronic (SOPO), 2010 Symposium on
Conference_Location :
Chengdu, China
Print_ISBN :
978-1-4244-4963-7
Electronic_ISBN :
978-1-4244-4964-4
DOI :
10.1109/SOPO.2010.5504398
