Topic
Acoustic interferometer
About: Acoustic interferometer is a research topic. Over the lifetime, 1493 publications have been published within this topic receiving 19355 citations.
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17 May 1994
TL;DR: In this paper, a five-channel splitter of a new type is discussed, in which normal optical modes of monochromatic light interact simultaneously with two acoustic waves, which differ in frequency.
Abstract: A five-channel splitter of a new type is discussed. In this splitter, normal optical modes of monochromatic light interact simultaneously with two acoustic waves. These two waves are orthogonal with respect to each other and differ in frequency. Experiments reveal a splitting at transverse sound frequencies of 20.1, 16, and 13.5 MHz at light wavelengths of 488, 514, and 633 nm, respectively, in a TeO2 single crystal.
22 Oct 2000
TL;DR: In this paper, the precise quantitative study of two optical beam diffraction by SAW corresponding the real experimental situations in crystals has been done, and a measurement algorithm and scheme for the SAW velocity studding that increases the methods possibilities are described.
Abstract: The precise quantitative study of two optical beam diffraction by SAW corresponding the real experimental situations in crystals has been done. Acoustical anisotropy, light diffraction, and interference are taking into account. It helps to find restrictions and possibilities for the SAW velocity measurement utilizing the two-beam optical interferometer. The new measurement algorithm and scheme for the SAW velocity studding that increases the methods possibilities are described.
23 May 1990
TL;DR: Based on the perturbation theory, eight different types of structures on an acoustic waveguide are analyzed in this paper to find the least leaky waveguide, the most efficient reflector, and the optimal mode shape for improved performances.
Abstract: Surface acoustic waves (SAWs) for micrograting reflectors are characterized Based on the perturbation theory, eight different types of structures on an acoustic waveguide are analyzed Results of simulations of all eight types of corrugation structures are evaluated in order to find the least leaky waveguide, the most efficient reflector (with minimum necessary perturbations), and the optimal mode shape for improved performances General design curves are presented in order to illustrate the behavior of the incident and reflected waves under a variety of structural conditions Analytic expressions for the calculations of the mode amplitude and mode shape, and for general acoustic corrugations are derived Simulation results are presented >
01 Aug 2005
TL;DR: In this article, an artificial soft surface is proposed to reduce and attenuate the propagation of acoustic waves along the surface of hard ground, where an infinitesimal pressure line source is used as the excitation.
Abstract: : An artificial soft surface is proposed to reduce and attenuate the propagation of acoustic waves along the surface of hard ground. An infinitesimal pressure line source is used as the excitation. Instead of an ideal periodic structure, a quasi-periodic structure is used where a finite number of grooves are incorporated to model exactly the realistic situation. Two boundary integral equation methods are proposed, one is based on the free space Green's function. The multilevel fast multiple algorithm is used to speed up the matrix-vector product necessitated by iterative methods used in solving the final linear system. The second method is more efficient in that two half space Green's function are employed rather than the free space Green's function so that the edge effect is removed, which results from boundary truncation, and the size of the linear system is greatly reduced. They are then used to analyze the behavior of acoustic wave propagation above textured surfaces, the impedance of which is, as expected, altered. The effects of the number and the geometry of grooves, and the effect of source height are also investigated. The conclusions drawn can be used for reference in a practical problem of mitigating gun blast noise.