04779959 is referenced by 92 patents and cites 7 patents.

An electro-optic modulator consists of a Fabry-Perot etalon containing intra-cavity liquid crystal material between mirror layers. Each mirror bears a respective rubbed polyimide layer, which provides homogeneous alignment of the liquid crystal molecules. The mirror layers are connected to a bias voltage source, which provide an electrical bias variable between two values both above the threshold for refractive index sensitivity to applied voltage. For nematic materials, this is the Freedricks threshold or transition. The bias variation provides optical modulation of the etalon transmission with a time constant which is much shorter than devices switching between voltages either side of the threshold.

Title
Liquid crystal electro-optic modulator in a fabry-perot interferometer
Application Number
7/93038
Publication Number
4779959
Application Date
September 4, 1987
Publication Date
October 25, 1988
Inventor
Frances C Saunders
Worcester
GB
Agent
Nixon & Vanderhye
Assignee
The Secretary of State for Defence in Her Britannic Majesty s Government of the United Kingdom of Great Britain and Northern Ireland
GB
IPC
G02F 1/13
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