| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a low-cost triaxial photoelectric field sensor by reducing the number of components. <P>SOLUTION: This triaxial photoelectric field sensor is equipped with a triaxial sensor part 20 having three antennas for grasping an electric field and three light modulators forming pairs with the antennas respectively, for applying intensity modulation to light by the electric field, a light source 33 for generating unmodulated light, an optical switch 35 for switching the optical path of light supplied from the light source 33 through an optical circulator 34, a transmission single mode optical fiber 36 for transmitting output light from the optical switch 35, supplying it to one of the three light modulators disposed on the triaxial sensor part 20, transmitting modulated light outputted from the light modulator, and inputting it into the optical switch 35 from the reverse direction, and an O/E (optical-to-electrical) transducer 37 for converting the modulated light inputted through the optical switch 35 and the optical circulator 34 into an electric signal. The three antennas disposed on the triaxial sensor part 20 are arranged respectively so as to take the maximum sensitivity to mutually-orthogonal three axes. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
