Abstract
In the optical detection of ultrasound, resonators with high Q-factors are often used to maximize sensitivity. However, increasing the Q-factor of a resonator may reduce the linear range of the interrogation scheme, making it more susceptible to strong external perturbations and incapable of measuring strong acoustic signals. In this Letter, a passive-demodulation scheme for pulse interferometry was developed for high dynamic-range measurements. The passive scheme was based on an unbalanced Mach–Zehnder interferometer and a 90° optical hybrid, which was implemented in a dual-polarization all-fiber setup. We demonstrated the passive scheme for detecting ultrasound bursts with pressure levels for which the response of conventional, active interferometric techniques became nonlinear.
© 2018 Optical Society of America
Full Article | PDF ArticleMore Like This
Yoav Hazan and Amir Rosenthal
Opt. Express 27(20) 28844-28854 (2019)
Oleg Volodarsky, Yoav Hazan, Michael Nagli, and Amir Rosenthal
Opt. Express 30(6) 8959-8973 (2022)
Lucas Riobó, Yoav Hazan, Francisco Veiras, María Garea, Patricio Sorichetti, and Amir Rosenthal
Opt. Lett. 44(11) 2677-2680 (2019)