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.
© 2001 Optical Society of America
Jianmin Gong, J. M. K. MacAlpine, Wei Jin, and Yanbiao Liao, "Locating Acoustic Emission with an Amplitude-Multiplexed Acoustic Sensor Array Based on a Modified Mach-Zehnder Interferometer," Appl. Opt. 40, 6199-6202 (2001)