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3 edition of Analysis and acoustooptical measurements of bulk and surface acoustic wave fields found in the catalog.

Analysis and acoustooptical measurements of bulk and surface acoustic wave fields

Analysis and acoustooptical measurements of bulk and surface acoustic wave fields

final report

by

  • 256 Want to read
  • 27 Currently reading

Published by Dept. of Electrical Engineering, Virginia Polytechnic Institute and State University, NASA Langley Research Center in Blacksburg, VA, Hampton, VA .
Written in English

    Subjects:
  • Acoustooptics.,
  • Acoustic surface waves.,
  • Acoustic measurement.,
  • Acousto-optics.,
  • Bulk acoustic wave devices.,
  • Piezoelectric transducers.,
  • Sound waves.,
  • Surface acoustic wave devices.,
  • Ultrasonic wave transducers.

  • Edition Notes

    Microfiche. [Washington, D.C. : National Aeronautics and Space Administration], 1984. 1 microfiche.

    Statementprepared by: R O. Claus, G. D. Dockery, J. W. Gray.
    SeriesNASA CR -- NASA CR-173271., NASA contractor report -- NASA CR-173271.
    ContributionsDockery, G. D., Gray, J. W., Virginia Polytechnic Institute and State University. Harry Lynde Bradley Dept. of Electrical Engineering., Langley Research Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL17727238M

    Analysis of photoacoustic signal dependence on modulation frequency for YAG crystal doped with Cr +3 Anna Sikorska Proc. SPIE , Acousto-Optics and Applications IV, pg (6 November ); doi: / The measurements were carried out using the Bragg light diffraction on longitudinal and transverse acoustic waves at room temperature in a frequency range from to GHz. According to the known perturbation theory, the attenuation coefficient can be defined in terms of the effective viscosity. A one-dimensional, acoustic metamaterial was created by drilling an array of holes into a PVC pipe. It was observed that frequencies below Hz dissipate while at Hz and above, the acoustic waves continue to propagate. Therefore the material exhibits a negative bulk modulus in the frequency range of 0 to Hz. The acousto-optical Q-switch often used in the laser marking makes use of mutual interaction between an ultrasonic wave and a light beam in a scattering medium. The light beam that enters in a direction forming a Bragg angle to the wave surface of the acoustic wave in the scattering medium is diffracted in accordance with periodic changes in.

    surface cracks include the analysis of metal fatigue and inspection of engineering ceramics, and the theoretical analysis may provide the basis for eventually charac-terizing surface microcracks quantitatively. 1. THE PHENOMENON Acoustic microscopy The uniqueness of acoustic microscopy lies in the ability to image the way in which acoustic.


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Analysis and acoustooptical measurements of bulk and surface acoustic wave fields Download PDF EPUB FB2

Get this from a library. Analysis and acoustooptical measurements of bulk and surface acoustic wave fields: final report. [R O Claus; G D Dockery; J W Gray; Virginia Polytechnic Institute and State University. Harry Lynde Bradley Department of. wave transducer will couple only to the horizontally polarized shear mode.

The leaky wave is accompanied by all three bulk modes. The relative strength of bulk and surface wave cou- pling will be considered in detail later.

EQUATIONS. MOTION. AND. BOUNDARYCONDITIONS. Acoustic waves in a typical material are some five orders of. Nonlinear acousto-optical diffraction by surface and bulk standing acoustic waves Conference Paper (PDF Available) July with 38 Reads How we measure 'reads'. The most common acoustic measurement tools are the Loudness Meter, and the Real-Time Analyser.

The Loudness meter measures dbSPL. The Real-Time Analyser measures the power of individual frequency. Chapter 2 describes the operation of the bulk-acoustic-wave thin-film resonator.

Initially, a generalized description of the piezoelectric effect will be given from which the material properties of the piezoelectric film will be analyzed.

This analysis leads to the possibility of modelling the one­Author: Ronald Patrick O'Toole. We present systematic measurements of the quality factors of surface acoustic wave (SAW) resonators on ST-X quartz in the gigahertz range at a temperature of $10 \, \textrm{mK}$.

The change in phase or frequency, related to the velocity of the acoustic wave, is proportional to adsorbed ation of a viscous liquid to the device surface results primarily in energy dissipation and, to a lesser degree, in phase change 9., The penetration depth δ of the wave inside the liquid sample is the depth at which the wave amplitude has decayed to 1/e of its Cited by: The acousto-optic interaction with leaky surface acoustic wave radiation into the bulk of YX-cut LiTaO 3 crystals has been investigated.

The light incidence and diffraction angles corresponding to the strongest acousto-optic interaction were calculated and measured as functions of the acoustic wave by: 6.

interaction of an optical wave with a surface acoustic wave is much more complicated than that with a bulk wave In Sec. II we will first analyze this problem, starting from the refractive index ellipsoid.

The principles of the photoelastic and interferometric methods are illustrated using Jones for- by: R. Claus has written: 'Analysis and acoustooptical measurements of bulk and surface acoustic wave fields' -- subject(s): Acoustic surface waves, Piezoelectric transducers, Surface acoustic wave.

bulk crystal does not necessarily have to be piezoelec-tric because the bulk acoustic wave is launched from the transducer Analysis and acoustooptical measurements of bulk and surface acoustic wave fields book to the crystal. Therefore, a bulk crys-tal with a large gure of merit (FOM), such as eOT 2 or As 2S 3 can be used.

On the other hand, for an AOM driven by a surface acoustic wave (W),SA earlier studies suggested a struc. Analysis and acoustooptical measurements of bulk and surface acoustic wave fields book Acoustic and Elastic Wave Fields in Geophysics, Part I, Volume 32 - 1st Edition.

Print Book & E-Book. ISBNT1 - MEASUREMENT OF SURFACE ACOUSTIC WAVE VELOCITY ANISOTROPY WITH A SCANNING LASER ACOUSTIC MICROSCOPE. AU - Robbins, William P. AU - Rudd, Eric P. PY - /12/1. Y1 - /12/1. N2 - The measurement of the velocity and power flow angle of surface acoustic waves (SAWs) using a scanning laser acoustic microscope is by: 1.

Analysis and acoustooptical measurements of bulk and surface acoustic wave fields book By using an atomic-force-microscope-based technique, we image the vibration of high-frequency, bulk-mode, thin-film resonators.

Our experimental technique is capable of monitoring the vibration of Analysis and acoustooptical measurements of bulk and surface acoustic wave fields book devices over a broad frequency range, from 1 MHz to beyond 10 GHz, allowing us to obtain quantitative measurements of the piezoelectric properties of thin Cited by: It is shown that for surface wave delay lines with parallelepiped substrate geometry, the plate modes of the substrate describe the entirety of the spurious responses of the transducers.

Experimental evidence is presented which shows that by carrying out a superposition of the plate modes, both the in‐band distortion and the out‐of‐band rejection can be quantitatively by:   Acoustic wave sensor and measurements.

The work described here was carried out with a Love wave device, a waveguide configuration based on a surface acoustic wave sensor (Fig. A guided shear horizontal surface acoustic wave is associated with a shear-oscillating displacement confined at the surface of an acoustic wave solid device overlaid.

A scanning homodyne Michelson interferometer is constructed for two-dimensional imaging of high-frequency surface acoustic wave (SAW) fields in SAW devices.

The interferometer possesses a sensitivity of ∼ nm/Hz, and it is capable of directly measuring SAW’s with frequencies ranging from MHz up to 1 GHz. The fast scheme used for locating the. acoustic effects in periodic elastic structures called phononic crystals. This study is aimed at developing a theory for two-dimensional phononic crystal consisting of materials with general anisotropy.

Explicit formu-lations of the plane harmonic bulk wave and the surface wave dispersion relations in such a general phononicFile Size: 1MB. Acoustic parameters, the mass density and bulk modulus, which are analogous to the permittivity and permeability in electromagnetic waves are identified as key parameters for acoustic wave science.

We now know that various values of effective mass density and bulk modulus including negative values can be achieved by engineering mass-spring Cited by: 9.

Table 2: Stress estimated results by using surface acoustic wave 5. Conclusions This study proposed a method to measure the residual stress on the surface of an isotropic material using the acousto-elastic effect of surface acoustic wave.

Acoustic measurements. Our experiment was carried in the anechoic chamber in order to eliminate the influence of the reflected waves. An absorptive plate was used to separate the incident and reflected acoustic fields as shown in Fig. 2(c). To obtain an acoustic plane wave, a loudspeaker was located 3 m away from the sample (much larger than Cited by: Sound intensity, also known as acoustic intensity, is defined as the power carried by sound waves per unit area in a direction perpendicular to that SI unit of intensity, which includes sound intensity, is the watt per square meter (W/m 2).One application is the noise measurement of sound intensity in the air at a listener's location as a sound energy teristic: Symbols.

Theory of acoustic attenuation, dispersion, and pulse propagation in unconsolidated granular materials including marine sediments Michael J.

Buckinghama) Marine Physical Laboratory, Scripps Institution of Oceanography, University of California, San Diego, compressional wave that emerges from the analysis shows: ~1. an attenuation that File Size: KB. When material combinations and/or boundary conditions are not satisfied to support the Stoneley-like wave, interface waves may become lossy [3] and radiate acoustic energy through mode conversion into bulk waves (Fig.

1b), like the case of the leaky Rayleigh wave propagating at a solid-liquid by: 1. sity and the bulk modulus of a material through acoustic wave equation where P is the pressure and ρ,B are the mass density and bulk modulus of materials, respectively.

Physically, the mass density is defined as mass per unit volume and the bulk modulus reflects the medium’s resistance to exter-nal uniform compression. These two parameters areCited by: 9. Rapid measurement of surface acoustic wave velocity on single crystals using an all-optical adaptive scanning acoustic microscope Y.

Hong, S. Sharples, M. Clark, and M. Somekha) School of Electrical and Electronic Engineering, University of Nottingham, United Kingdom, NG7. Open Library is an open, editable library catalog, building towards a web page for every book ever published.

Acoustic fields and waves in solids by Auld, B. A.,R.E. Krieger edition, in English - 2nd ed. Time-frequency analysis, in particular, Wigner–Ville analysis, takes advantage of the evolution time dependent aspect of the echo spectrum to differentiate a man-made target, such as an elastic spherical shell, from a natural object of the similar shape.

A key energetic feature of fluid-loaded and thin spherical shell is the coincidence Cited by: Phoxonic crystal is a promising material for manipulating sound and light simultaneously. In this paper, we theoretically demonstrate the propagation of acoustic and optical waves along the truncated surface of a two-dimensional square-latticed phoxonic crystal.

Further, a phoxonic crystal hetero-structure cavity is proposed, which can simultaneously confine surface acoustic. We use Joness matrix method and the global optimal method to investigate the propagation characteristic of surface acoustic wave(SAW) for X-cut single crystal Lithium Niobate(LiNbO3).

As an application, a novel integrated acousto-optical filter, which allows to minimize the dimension of AO cells and suppress side-lobes, was designed on the base of Author: Chuan-jing Wen, Ji-sheng Yang.

acoustic phonons. Let us consider an optically stimulated traveling acoustic resonance (fre-quency a) on a microsphere device with an integer number of acoustical wave-lengths (Ma) around the circumference (Fig.

1(d), right). We further consider that this resonance travels uni-directionally along the equator at the speed of sound (Fig. 1(b), left).File Size: 4MB. In endoscopic elastography, it is needed to observe small area with high spatial resolution. Optical coherence tomography (OCT) is one of the candidate imaging methods, which has the depth resolution of several~10 μm.

In this study, we try to find the propagation velocity of surface acoustic wave (SAW) using a swept-source OCT (SS-OCT). The depth scanning rate Cited by: 1. Below are the cross-sectional graphs for N=10, 20, 30, and for the sound pressure field at the surface of the sphere, for a plane wave of frequency Hz.

Sample points have been used. It’s looking good, it’s looking good and it fails. You can write a book review and share your experiences. Other readers will always be interested in your opinion of the books you've read.

Whether you've loved the book or not, if you give your honest and detailed thoughts then people will find new. bandwidth, it is observed that unlike bulk-type devices [9], the Bragg bandwidth of guided-wave devices not only is limited by the acoustic center frequency, the acoustic bandwidth, and the aperture of the SAW, but also depends on the diffraction effi­ cency of the device and the optical modes involved [2d].

Ultra-Broadband Acoustic Metasurface for Manipulating the Reflected Waves Yi-Fan Zhu1,2,3†, Xin-Ye Zou1,2,3†, Rui-Qi Li1, Xue Jiang1, Juan Tu1, Bin Liang1,2,3*, and Jian-Chun Cheng1,2,3* 1Key Laboratory of Modern Acoustics, MOE, Institute of Acoustics, Department of Physics, Nanjing University, NanjingP.

China 2Collaborative Innovation Center for. The High Precision Scanning Acoustic Microscope used for Rayleigh wave velocity measurements has been described in the literature [8].

Essentially the difference between the commercial acoustic microscopes and HIPSAM is the capability to acquire the full digitized wave form of the reflected signal from the sample and utilization of software. new definitions to more usual interpretations.

Measurements were later extended to more complex sound fields by Mann and Tichy 2 who measured instantaneous intensity in the acoustic near field of resonant cavities and vibrating plates. Here, Mann and Tichy propose that one may deduce the vibrational characteristics of a plate using reactive.

the spectral measurements. Figure 4. Experimental setup for the spectral measurements of the FBG using the SLD (top) or the tunable laser (bottom). In the second step of the experimental procedure the laser output was connected to a circulator (FDK YC) so that both the transmitted and reflected signal could be Size: KB.

TJ Huang, Surface Acoustic Wave Driven Light Shutters Using Polymer-Dispersed Liquid Crystals, Advanced MateriPolymer-dispersed liquid crystals (PDLCs) are used in numerous applications including smart windows, displays, micro-lenses, lasers, and data storage due to their excellent electro-optical properties.

Properties of SiAlO 2N protective coatings on surface acoustic wave devices Pdf T. Sturtevant a,c,⁎, Mauricio Pereira pdf Cunha b,c, Robert J. Lad a,c a Department of Physics & Astronomy, University of Maine, Orono, MEUSA b Department of Electrical & Computer Engineering, University of Maine, Orono, MEUSA c Laboratory for Surface .Acoustic resonance spectroscopy (ARS) download pdf a method of spectroscopy in the acoustic region, primarily the sonic and ultrasonic regions.

ARS is typically much more rapid than HPLC and is non destructive and requires no sample preparation as the sampling waveguide can simply be pushed into a sample powder/liquid or in contact with a solid sample.Integrated optical rotation sensor (IORS) is ebook new type of optical sensors.

In this paper, an integrated acousto-optic frequency shifter (AOFS) with surface acoustic wave (SAW) is developed as one of key integrated elements of IORS.

The design, fabrication and test of acousto-optic frequency shifter with SAW are by: 2.