US 12,241,776 B2
Ultrasound detection based on phase shift
Amir Rozental, Haifa (IL); Lucas Riobo, Buenos Aires (AR); and Yoav Hazan, Haifa (IL)
Assigned to TECHNION RESEARCH & DEVELOPMENT FOUNDATION LIMITED, Haifa (IL)
Filed by TECHNION RESEARCH & DEVELOPMENT FOUNDATION LIMITED, Haifa (IL)
Filed on Sep. 19, 2023, as Appl. No. 18/370,040.
Application 18/370,040 is a continuation of application No. 17/420,903, granted, now 11,796,383, previously published as PCT/IL2020/050016, filed on Jan. 7, 2020.
Claims priority of provisional application 62/833,912, filed on Apr. 15, 2019.
Claims priority of provisional application 62/789,015, filed on Jan. 7, 2019.
Prior Publication US 2024/0011822 A1, Jan. 11, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G01H 9/00 (2006.01); A61B 5/00 (2006.01)
CPC G01H 9/004 (2013.01) [A61B 5/0097 (2013.01)] 19 Claims
OG exemplary drawing
 
10. A method of detecting acoustic waves, the method comprising:
directing a continuous-wave source laser beam to an optical resonator that is impinged by acoustic waves, wherein said source laser beam is propagated through said optical resonator, thereby generating a propagated laser beam; and
detecting said acoustic waves by monitoring, using an interferometer, transients in an optical phase in said propagated laser beam, wherein said transients are indicative of a waveform of said acoustic waves, wherein said monitoring comprises interfering said propagated laser beam with a reference beam, and
wherein said propagated laser beam and said reference laser beam have an optical path difference equal to zero at a wavelength of said source laser beam.