2 edition of Studies of certain acousto-optic interactions in anisotropic media. found in the catalog.
Studies of certain acousto-optic interactions in anisotropic media.
Michael Dane Stewart
Written in English
Thesis (Ph. D.)--The Queen"s University of Belfast, 1979.
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Special attention is given to design procedures for the entire range of acousto-optic devices and a wide variety of applications for these devices is also described. Further topics include bulk wave and thin-film devices, transducer theory, isotropic and birefringent interaction. Suitable for use as a textbook or practical design handbook Cited by: The acousto-optic figure of merit (FOM) indicates the ideal coupling orientation to maximize the refractive index change due to an acoustic signal. [more] The FOM is a function of the acoustic wave velocity, density, refractive index, and effective elasto-optic coefficient.
In this paper two-dimensional and multiple dimensional acousto-optic interactions are studied. The sets of coupled wave equations of multiple dimensional acousto-optic diffraction with multiple acoustic waves along different directions is put forward and its solutions are : Qida Zhao, Shiya He, Kuanxin Yu, Jinfeng Zhou, Peiru Zhao, Guiqing Zhang, Xiaoyi Dong. Massachusetts Institute of Technology School of Architecture + Planning. Donate to the Lab. Except for papers, external publications, and where otherwise noted, the content on this website is licensed under a Creative Commons Attribution International license (CC BY ).This also excludes MIT’s rights in its name, brand, and trademarks.
The study of phononic materials and structures is an emerging discipline that lies at the crossroads of vibration and acoustics engineering and condensed matter by: Efficiency of collinear acousto-optic interaction in anisotropic media Yury S. Dobrolenskiy ; Vitaly B. Voloshinov Proc. SPIE , Acousto-optics and Photoacoustics, B (29 September ); doi: /
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Acousto-optic components use a range of different materials in a variety of configurations. These can be heard described by terms such as longitudinal- Studies of certain acousto-optic interactions in anisotropic media.
book shear-mode, isotropic and anisotropic. While these all share the basic principles of momentum and energy conservation, these different modes of operation have very different performances.
A theoretical study of acousto-optic interaction in acoustically anisotropic media is performed. A new criterion for estimating the Raman-Nath and Bragg regimes of light diffraction by means of ultrasound in acoustic crystals is proposed. The modified Klein-Cook parameter is found to consider the walkoff of ultrasonic wave energy as a result of the elastic anisotropy of a : A.
Zakharov, N. Polikarpova, V. Voloshinov. A strong acousto-optic interaction of bounded light and sound beams of a Gaussian shape is considered for different geometries permitting long-term interaction. The anisotropic spreading of an acoustic beam in the course of its propagation is taken into by: 2.
Introduction. Optics has had a very long and full history, from ancient Greece, through the renaissance and modern times. As with optics, acoustics has a history of similar duration, again starting with the ancient Greeks.
In contrast, the acousto-optic effect has had a relatively short history, beginning with Brillouin predicting the diffraction of light by an acoustic wave, being propagated.
The Raman–Nath, intermediate and Bragg regimes of acousto-optic interaction in an acoustically anisotropic medium are theoretically examined in the pa Cited by: Scheme of acousto-optic interaction with Lamb waves in an resented by the dimensional parameter k i d on the acoustic frequency variation proportional to K t d.
anisotropic plate. V.N. were anisotropic, and it was soon discovered that anisotropic operation led to special advantages in certain cases 2 Acousto -Optic Interaction Acousto -Optic Effect The acousto-optics is a field of physics that studies the interaction between sound and light.
This interaction effect. Applied Acoustics 29 () Instrumentation Techniques for Acousto-optic Studies in Complex Materials V. Singh National Physical Laboratory, New DelhiIndia (Received 8 September ; accepted 9 November ) A BSTRA CT Instrumentation and measurement techniques required for acousto-optic studies for complex and heterogeneous solid materials are by: 1.
New ousto-OpticAc gimeRe of Interaction in Media Possessing Strong Elastic Anisotropy 39 medium is equal to = In the interaction shown in Fig. 8, not the di racted but the incident optical beam propagates collinearly with ultrasound.
However, vector diagram of the interaction, to a great extent, is similar to that in Fig. The paper presents results on acousto-optic investigation of unusual acoustic phenomena taking place in crystals possessing strong anisotropy of elastic properties.
Advantages of the applied method of analysis are demonstrated by the example of the commonly used acousto-optic material tellurium dioxide. The major goal of the research consists of experimental verification of theoretical Cited by: PROCEEDINGS VOLUME Acousto-optics and Photoacoustics.
Editor(s): Antoni Sliwinski Efficiency of collinear acousto-optic interaction in anisotropic media Analysis and application of Bragg acousto-optic diffraction in biaxial media Author(s). The acousto-optic figure of merit values of the medium are calculated for arbitrary propagation and polarization directions of the interacting light and ultrasonic waves.
3 Outline Introduction: Regimes of operation for the acousto-optic cells. The Bragg acousto-optical interaction in anisotropic medium. A one-phonon non-collinear acousto-optical interaction: The number of resolvable spots.
Estimations for a tellurium dioxide crystal. A two-phonon non-collinear light scattering: The number of resolvable spots.
This work offers detailed discussions on all aspects of acousto-optic deflectors, modulators and tunable filters, emphasizing hands-on procedures for design, fabrication and testing. It contains previously unpublished treatments of acousto-optic device design and impedance matching, permitting the a.
This work offers detailed discussions on all aspects of acousto-optic deflectors, modulators and tunable filters, emphasizing hands-on procedures for design, fabrication and testing. It contains previously unpublished treatments of acousto-optic device design and impedance matching, permitting the actual design of real devices and device-matching circuits.
Acousto-optical imaging is an alternative technology to photoacoustic imaging, in which sound is used to modulate a light source, but it potentially shares some of the advantages of photoacoustic imaging, and our studies were motivated by the need to better understand the nature of acousto-optic by: 9.
In an anisotropic medium, two types of acousto-optic interaction are possible. If the optical mode does not change during the acousto-optic interaction, then (type of scattering) or (scattering) and the Bragg angle is determined by Eq.
(5). This type of acousto-optic interaction is known as isotropic diffraction. A Guide to Acousto-Optic Modulators D. McCarron December 7, 1 Introduction Acousto-optic modulators (AOMs) are useful devices which allow the fre-quency, intensity and direction of a laser beam to be modulated.
Within these devices incoming light Bragg di racts o acoustic wavefronts which propagate through a crystal. Acousto-optic imaging Many more A generic feature of many inverse problems in imaging is severe ill- posedness.
Such ill-posedness typically results in reconstructed im- ages with low spatial resolution. We will show that improvements in resolution are possible, in principle, if "internal degrees of freedom".
An acousto-optic modulator (AOM), also called a Bragg cell or an acousto-optic deflector (AOD), uses the acousto-optic effect to diffract and shift the frequency of light using sound waves (usually at radio-frequency).They are used in lasers for Q-switching, telecommunications for signal modulation, and in spectroscopy for frequency control.
A piezoelectric transducer is attached to a material. Moreover, previous studies of acousto-optic interactions have mainly reported the effects of sound on coherent light sources via photon tagging, and/or the production of diffraction phenomena from phase effects that give rise to discrete by: 9.Using the elementary theory of the acousto-optic nonlinear interaction,an empirical formula is developed for the diffracted light in terms of the acoustic power.
Using this formula, closed-form expression, in terms of the modified Bessel functions, are obtained for the diffracted-light components resulting from interaction with a multisinusoidal acoustic : Jin Ling Wu, Hua Long Yu, Zhan Hua Huang.Elastic waves possess some remarkable properties and it is these that explain their important role in the processing of electronic signals and the sensing of physical quantities.
For example, they can be generated by localized or distributed sources, can propagate in the core or on the surface of.