Amplitude multiplexing of Mach-Zehnder interferometer array and its application to locating acoustic emission

Jianmin Gong; J. M. K. MacAlpine; Wei Jin; Yanbiao Liao

doi:10.1117/12.447365

30 October 2001 Amplitude multiplexing of Mach-Zehnder interferometer array and its application to locating acoustic emission

Jianmin Gong, J. M. K. MacAlpine, Wei Jin, Yanbiao Liao

Author Affiliations +

Proceedings Volume 4596, Advanced Photonic Sensors and Applications II; (2001) https://doi.org/10.1117/12.447365
Event: International Symposium on Photonics and Applications, 2001, Singapore, Singapore

Abstract

We report an amplitude division multiplexed interferometric sensor array for locating acoustic emission. The interferometer is composed of 3 arms, the two sensing arms have different interference amplitude with the reference arm, so we can judge whether a sensor receives sound or not from the composite interference amplitude. For single sound source, the sound-receiving delay of two sensors can be obtained from the time when the interference amplitude changes, and the sound source location relative to the sensors can also be achieved in a 1-D system. Preliminary experiments were carried out and demonstrated a one-dimensional (1-D) location accuracy of better than 1cm. The system can be extended for 2-D and 3-D location of acoustic emissions by adding one or two more sensing arms, respectively, in the interferometer.

Citation Download Citation

Jianmin Gong, J. M. K. MacAlpine, Wei Jin, and Yanbiao Liao "Amplitude multiplexing of Mach-Zehnder interferometer array and its application to locating acoustic emission", Proc. SPIE 4596, Advanced Photonic Sensors and Applications II, (30 October 2001); https://doi.org/10.1117/12.447365

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