We report on an amplitude–division-multiplexed interferometric sensor array for locating acoustic emission. Preliminary experiments were carried out with a modified Mach–Zehnder interferometer consisting of two sensing arms and a reference arm and demonstrated a one–dimensional location accuracy of a few centimeters. The system can be extended for two– and three–dimensional location of acoustic emissions by the addition of one or two more sensing arms, respectively, in the interferometer.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics