Title :
A new type optical fiber vibration-sensor
Author :
Kimura, Mitsuteru ; Toshima, Katsuhisa
Author_Institution :
Fac. of Eng., Tohoku Gakuin Univ., Tagajo, Japan
Abstract :
A new design of bulb-lens for emitted light collimation is proposed and demonstrated, and a vibration-sensor as an optical fiber sensor combined with an optical fiber with the bulb-lens for vibration and the silicon micro-fabrication technique, is also proposed and demonstrated. Nearly flat frequency dependence of the optical output was obtained in the frequency range between 40 and 1200 Hz under constant acceleration. Resolution (or equivalent noise level) of 0.3 m/s2 is attained in this prototype device. Multimode vibrations are analyzed by FFT analysis of optical signals output from this vibration-sensor
Keywords :
fast Fourier transforms; fibre optic sensors; lenses; micromachining; optical collimators; optical design techniques; optical fibre fabrication; optical information processing; optical noise; vibration measurement; 40 to 1200 Hz; FFT analysis; Si micro-fabrication technique; bulb-lens design; constant acceleration; emitted light collimation; equivalent noise level; frequency range; multimode vibrations; nearly flat frequency dependence; optical fiber vibration-sensor; optical output; optical signals output; resolution; Frequency dependence; Optical collimators; Optical design; Optical fiber sensors; Optical fibers; Optical noise; Optical sensors; Signal analysis; Silicon; Stimulated emission;
Conference_Titel :
Solid State Sensors and Actuators, 1997. TRANSDUCERS '97 Chicago., 1997 International Conference on
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-3829-4
DOI :
10.1109/SENSOR.1997.635445
