Abstract
A pressure-sensitive device using an optical fiber coupler is proposed, and is integrated into an array system to measure sound field distributions. The optical coupling between two optical fibers is modulated by the applied sound field with the use of a membrane mechanically connected to the coupler. In the array system, a large number of the optical coupler sensors are connected two-dimensionally, and sound pressure at each sensor can be read out by switching the input light sources in turn. A prototype of the basic array system based on this principle was made, and its performance was demonstrated. The signal discrimination between each element was confirmed in a 2x2 array; then, using a four-element linear array, we demonstrated the steering of beam based on the phased array method.
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References
J.A. Bucaro and H.D. Dardy: J. Acoust. Soc. Am.62 (1977) 1302.
K.B. Spillman Jr. and D.H. McMahon: Appl. Opt.19 (1980) 113.
L.B. Spillman, Jr. and D.H. McMahon: Appl. Phys. Lett.32 (1980) 145.
M.N. Fields and J.H. Cole: Appl. Opt.19 (1980) 3265.
for example, A.E.H. Love:A Treatise on the Mathematical Theory of Elasticity, (Dover, New York, 1944) 4th ed., p. 482.
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Nakamura, K., Fukaya, K. Optical fiber coupler array for multi-point sound field measurements. Optical Review 4, A65–A68 (1997). https://doi.org/10.1007/BF02935994
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DOI: https://doi.org/10.1007/BF02935994