Fast switching phase modulator based on nematic liquid crystals for phase multiplexing in holographic data-storage-systems
- Institut für Angewandte Physik, Technische Universität Darmstadt
steffen [dot] paulekuhn [at] physik [dot] tu-darmstadt [dot] de
Liquid crystals exhibit a wide range of interesting optical properties, one is the phase modulation of an optical wave by nematic liquid crystals. We employ this effect for the realization of a phase modulator built of a cell with 64 separate controllable stripes for phase multiplexing in a next generation holographic data storage device. Phase multiplexing in holographic systems is a proven way to increase the storage capacity of a holographic medium Advantages of our phase modulator are the compact size and the non-expensive manufacturing. To fasten the switching time we use a small cell gap and take advantage of the transient nematic effect. Furthermore the LC-cell is heated and temperature stabilized. Using the combination of these techniques we reach switching times of 3 ms and below.
@inproceedings{paulekuhn2005b7,
author = {Paulekuhn, Steffen and Peuser, Jörn and Schmiedchen, Marc and Petter, Jürgen and Tschudi, Theo},
title = {{Fast switching phase modulator based on nematic liquid crystals for phase multiplexing in holographic data-storage-systems}},
booktitle = {DGaO-Proceedings 2005},
series = {DGaO-Proceedings},
eventtitle = {106. Jahrestagung der DGaO},
eventdate = {2005-05-17/2005-05-20},
venue = {Wrocław},
publisher = {Deutsche Gesellschaft für angewandte Optik e.V.},
year = {2005},
pages = {B7},
url = {https://dgao-proceedings.de/paper/106-b7}
}