Abstract

In this Letter, an electro-optical probe configuration with polar molecule liquids as the sensing film is proposed to improve the voltage sensitivity. This method exhibited increases in intrinsic sensitivities better than 0.1mV/Hz, 2 orders of magnitude larger than the normal method using a GaAs probe in the same measurement system. Based on the mechanism of orientation polarization, the electro-optic coefficient was measured to be 250pm/V by the Teng–Man method at a modulation field of 100Hz. This technology will be promising in applications of low-frequency field detection.

© 2011 Optical Society of America

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