| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an optical voltage/electric field sensor with sensor sensitivity increased without impairing its temperature characteristics. <P>SOLUTION: In this optical voltage/electric field sensor, a light polarizer 2, electro-optic crystals 3a and 3b, a wavelength plate 4, and an analyzer 5 are disposed in order along its optical path. The plurality of crystals 3a and 3b each comprise Bi<SB>12</SB>GeO<SB>20</SB>as electro-optic crystals, and each of the crystals is impressed 7 with the same voltage or electric field. Depending on the wavelength of a light source, the sum of optical path lengths of the plurality of crystals 3a and 3b is set at a length L causing the rotation angle of linear polarization owing to optical rotatory power of the Bi<SB>12</SB>GeO<SB>20</SB>to be 45°. <P>COPYRIGHT: (C)2004,JPO</p> |
