Optical System for Linearizing Non-Linear Electro-Optic.
Patent, Filed 19 Feb 91, patented 28 Jul 92,
DEPARTMENT OF THE NAVY WASHINGTON DC
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A device for rapidly measuring voltages by electro-optic or magneto-optic means which exhibits a substantially linear response over much of its operating range. The device employs the Pockels effect in which the orientation of polarized light is altered in direct response to applied voltages. The response of the subject device is made substantially more linear by dividing the polarized light into two beams and retarding the phase of the second beam by one-quarter wavelength, attenuating its intensity by a factor of approximately four, and passing it through a second Pockels cell having a transducer constant of one half that of the first Pockels cell and then recombining, or superpositioning, the first and second beams of light, thus yielding a substantially linear response over much of the applied voltage range.
- Electrooptical and Optoelectronic Devices