A quality of parametric wave phase conjugation of ultrasound

Brysev, A. P.; Klopotov, R. V.; Krutyansky, L. M.

doi:10.1016/s0041-624x(02)00240-8

Cited by 3 publications

(2 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to improve the performance of the conjugator, the end of the rod was etched with concentric circular grooves 1.5 mm in depth. 10 The purpose of this corrugation is to allow more uniform transmission of the angular spectrum of the incident beam from the water into the rod. The beam propagated through the focal region to the conjugator.…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

“…The closest investigations a͒ Author to whom correspondence should be addressed. Electronic mail: krut@orc.ru in this regard, by Brysev et al, 9,10 report measurements of harmonic components generated in a conjugate beam propagating through an inhomogeneous layer. The emphasis was on compensation of phase aberration due to the inhomogeneity, rather than on variation of parameters influencing diffraction, and there were no comparisons with theory.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Focused nonlinear phase-conjugate waves generated by a solid parametric amplifier

Brysev

Bunkin

Krutyansky

et al. 2005

The Journal of the Acoustical Society of America

View full text Add to dashboard Cite

An experimental and numerical study is reported on focused, phase-conjugated sound beams of finite amplitude produced in water by a solid-state parametric amplifier, referred to as the conjugator. The sound beams incident on the conjugator were radiated by a focused circular source. Field distributions were measured along the beam axis and in the focal plane of the source. Both linear and nonlinear propagation were investigated. Apertures of different diameters were placed in front of the conjugator to demonstrate diffraction effects associated with size of the active surface of the conjugator. Peak-to-peak acoustic pressures of 8 MPa and strongly distorted, asymmetric waveforms were measured at the focus of conjugate beams having a fundamental frequency of 5 MHz. Numerical simulations of harmonic generation in the conjugate beams are in agreement with the measurements. The study reveals that the conjugate beams accurately reproduce the focal region of the incident beams when a sufficiently large aperture is used, even when substantial waveform distortion due to nonlinear propagation effects are observed in the conjugate beams.

show abstract

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Focused nonlinear phase-conjugate waves generated by a solid parametric amplifier

Brysev

Bunkin

Krutyansky

et al. 2005

The Journal of the Acoustical Society of America

View full text Add to dashboard Cite

show abstract

Paraxial theory of supercritical wave phase conjugation in a realistic magnetoacoustic conjugator

Merlen¹,

Zhang²

2006

Applied Physics Letters

View full text Add to dashboard Cite

A recent theory of supercritical phase conjugation gives explicitly the paraxial analytical solution for a completely active conjugator in contact with arbitrary media. This letter extends the theory to the more realistic case of a limited active zone inside a conjugator in contact with arbitrary media. This configuration describes more accurately the experimental situations in ultrasonic parametric phase conjugation. The main practical result is the possibility of adjustable artificial impedance

show abstract

Nonlinear ultrasonic phase-conjugate beams and their application in ultrasonic imaging

et al. 2004

View full text Add to dashboard Cite

A quality of parametric wave phase conjugation of ultrasound

Cited by 3 publications

References 5 publications

Focused nonlinear phase-conjugate waves generated by a solid parametric amplifier

Focused nonlinear phase-conjugate waves generated by a solid parametric amplifier

Paraxial theory of supercritical wave phase conjugation in a realistic magnetoacoustic conjugator

Nonlinear ultrasonic phase-conjugate beams and their application in ultrasonic imaging

Contact Info

Product

Resources

About