30 to 50 ns liquid-crystal optical switches
Author(s)Osgood, Richard M.; Kimball, B. R.; Geis, Michael W.; Turner, George W.; Lyszczarz, Theodore M.; Molnar, Richard J.; ... Show more Show less
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The optical switching times of liquid-crystal cells using 5CB, 5OCB and PCH5 liquid crystal materials have been characterized as a function of applied voltage, V, and temperature, T. The transition time from 90 to 10 % transmission scales as V-2 and is limited to 50 to 30 ns by the breakdown electric field, ~ 106 V cm-1 of the liquid crystal. The time from the initial voltage step to 90 % transmission, delay time, decreases with increasing voltage and approaches a constant value at higher electric fields, >105 V cm-1. Both the transition and delay times decrease with increasing temperature. The minimum transition times at temperatures a few degrees below the nematic-isotropic temperature are 32, 32, and 44 ns and delay times are 44, 25 and 8 ns for 5CB, 5OCB, and PCH5 respectively.
Proceedings of SPIE--the International Society for Optical Engineering; v.7618
M. W. Geis, R. J. Molnar, G. W. Turner, T. M. Lyszczarz, R. M. Osgood, and B. R. Kimball (2010). 30 to 50 ns liquid-crystal optical switches. Proc. SPIE 7618: 76180J/1-5. ©2010 COPYRIGHT SPIE--The International Society for Optical Engineering
Final published version
liquid crystal, optical switches