Compensation of the capacitance effects produced by a HPDLC cell on a voltage amplifier

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Title: Compensation of the capacitance effects produced by a HPDLC cell on a voltage amplifier
Authors: Márquez, Andrés | Martínez Guardiola, Francisco Javier | Ortuño, Manuel | Gallego, Sergi | Alvarez, Mariela L. | Beléndez, Augusto
Research Group/s: Holografía y Procesado Óptico
Center, Department or Service: Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal | Universidad de Alicante. Instituto Universitario de Física Aplicada a las Ciencias y las Tecnologías
Keywords: Liquid crystals | Photopolymer | Holography | Voltage amplifier
Knowledge Area: Óptica | Física Aplicada | Tecnología Electrónica
Date Created: May-2010
Issue Date: 8-Sep-2010
Publisher: Universidad Miguel Hernández de Elche
Citation: MÁRQUEZ RUIZ, Andrés, et al. "Compensation of the capacitance effects produced by a HPDLC cell on a voltage amplifier", En: 3rd International Worshop on Liquid Crystals for Photonics-LCP2010 : September 8-10, 2010, Elche : book of abstracts / Ignacio Moreno, editor. Elche : Universidad Miguel Hernández, 2010. Comunicación PB4, pp. 109-110
Abstract: Holographic polymer-dispersed liquid crystal (HPDLC) is a composite electro-optic material, able to exhibit holographic volume regime and whose refraction index can be varied by the application of an electric field. This electrical tunability combined with volume regime offer the possibility of many interesting photonics applications such as in diffraction optics, reflection display, and in optical interfaces and interconnects. In principle H-PDLC cells need high voltage AC signals, typically 1 kHz bipolar waveforms, to be tuned, therefore a high voltage amplifier in combination with a waveform generator is necessary. In this work we provide evidence of limitations in the voltage range applied with our voltage amplifier due to the capacitance of the HPDLC cell. The theoretical modelling, done using OrCAD-PSpice® software confirms the experimental results. Finally we show how this limitation can be overcome.
Sponsor: This work was supported by the "Ministerio de Ciencia e Innovación" (Spain) under projects FIS2008-05856-C02-01 and FIS2008-05856-C02-02.
URI: http://hdl.handle.net/10045/16065
Language: eng
Type: info:eu-repo/semantics/conferenceObject
Peer Review: si
Appears in Collections:INV - GHPO - Comunicaciones a Congresos, Conferencias, etc.

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