Title :
Displacement response, detection limit, and dynamic range of fiber-optic lever sensors
Author :
He, Gang ; Cuomo, Frank W.
Author_Institution :
Dept. of Phys., Rhode Island Univ., Kingston, RI, USA
fDate :
11/1/1991 12:00:00 AM
Abstract :
The authors present the evaluation of the displacement response, detection limit, and dynamic range of fiber-optic lever sensors in a general format to establish their dependence on fiber sizes, optoelectronic detector specifications, input power, and other relevant parameters. The formations for the normalized reflected optical power change are derived for the evaluation of the optimal sensor response, the linearity range, and the minimum detectable displacement. The theoretical models are verified by an experiment which determines sensor response, modulation index, reflected optical power change, and linear response range through dynamic measurement. The application of this theoretical model to the study of a fiber-optic microphone for acoustic pressure detection is considered
Keywords :
acousto-optical devices; displacement measurement; fibre optic sensors; microphones; optical modulation; pressure measurement; acoustic pressure detection; detection limit; displacement response; dynamic range; fiber sizes; fiber-optic lever sensors; fiber-optic microphone; input power; linearity range; minimum detectable displacement; modulation index; normalized reflected optical power change; optoelectronic detector specifications; reflected optical power change; Acoustic measurements; Acoustic sensors; Acoustic signal detection; Detectors; Dynamic range; Linearity; Optical fiber sensors; Optical modulation; Optical sensors; Optoelectronic and photonic sensors;
Journal_Title :
Lightwave Technology, Journal of
