TRIAXIAL OPTICAL FIELD SENSOR ELEMENT

• Main Author: ICHIJO ATSUSHI
• Format: Patent
• Language: English
• Published: 05.08.2004
• Edition: 7
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; TESTING

PROBLEM TO BE SOLVED: To provide a low-cost triaxial optical field sensor element for measuring an electric field in a triaxial direction easily by using one type of uniaxial optical field sensor element. SOLUTION: The triaxial optical field sensor element has three waveguide type Mach-Zehnder interferometers, where branch optical waveguides 4a, 4b, an antenna, and a metal electrode 8 as a modulation electrode are formed, on an LiNbO3substrate 1, thus detecting electric fields in triaxial directions that orthogonally cross one another. Then, the metal electrode 8 is formed on the surface of the LiNbO3substrate 1 so that an electric field that is inclined by 54.7° from the direction of the branch optical waveguides 4a, 4b as the antenna. The three waveguide type Mach-Zehnder interferometers are arranged while the direction of the branch optical waveguides is made nearly in parallel with one straight line, and are arranged axisymmetrically three times around one straight line. COPYRIGHT: (C)2004,JPO&NCIPI