| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a small photoelectric field sensor, capable of measuring an electric field in three-axis directions stably and accurately, even in a narrow space region. SOLUTION: The present photoelectric field sensor contains in a sensor head 41, an optical modulator consisting of a reflection-type Mach-Zehnder interferometer for measuring electric fields in three-axis directions of X, Y and Z. The sensor is constituted, by cladding a polarization holding type 3-core optical fiber 43 connected to each Mach-Zehnder interferometer in the optical modulator, with a non-metal holder rod 42 connected with the end surface of the sensor head 41. In the sensor head 41, the optical modulator is constituted, by installing 3 kinds of electric field sensor (reflection-type Mach-Zehnder interferometer) of a single-axis photoelectric field sensor 11 for X-axis direction, a single axis photoelectric field sensor 12 for Y-axis direction and single-axis photoelectric field sensor 13 for Z-axis direction for measuring the electric fields of three-axis directions of X, Y and Z on each side surface of support member 14 of a triangle column, having a rectangular triangle cross section which is arranged near the center of a housing 15.</p> |
