PURPOSE: To provide a light modulating function to the optical fiber perse by the constitution consisting in providing an ultrasonic transducer having transmittability for the light beam to be led into the optical fiber to one end face of the optical fiber.
CONSTITUTION: A light signal (parallel laser beam) BIN is sent at an incident angle θ into one end of an optical fiber 1 from the outside through the ultrasonic transducer 2 provided at one end of the optical fiber 1 and the ultrasonic transducer 2 is excited to propagate ultrasonic wave signals into the optical fiber 1, by which the suitably light-modulated light signal BOUT is emitted from the other end of the optical fiber 1 and the change in the light intensity thereof is detected by a photosensor 12 provided opposedly to the other end of the optical fiber 1.
KOYAMA JIROU
NISHIHARA HIROSHI
| JPS5390950A | 1978-08-10 | |||
| JP46029297A |