Abstract
A new operation mode of a parametric phase conjugation of ultrasound waves above the threshold of absolute parametric instability of phonons is reported. A deviation of the carrier frequency in a sequence of incident ultrasound bursts and in a proper sequence of electromagnetic pumping is applied. The deviation avoids amplification of the reverberation noise in the active medium when the repetition time of the conjugation is short enough to be comparable with the relaxation time of acoustic reverberations. As a result, a decrease of repetition time and a correspondent increase of the average output power of a phase conjugator becomes available. The advantage of the new operation mode is demonstrated on an example of supercritical phase conjugation in magnetoacoustic ceramics.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: IEEE transactions on ultrasonics, ferroelectrics, and frequency control
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
