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Title: Amplitude multiplexing of Mach-Zehnder interferometer array and its application of locating acoustic emission
Authors: Gong, J
Macalpine, JMK
Jin, W 
Liao, Y
Issue Date: 2001
Publisher: SPIE-International Society for Optical Engineering
Source: Proceedings of SPIE : the International Society for Optical Engineering, 2001, v. 4596 How to cite?
Journal: Proceedings of SPIE : the International Society for Optical Engineering 
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.
Description: SPIE Conference on Advanced Photonic Sensors and Applications II, Singapore, 26-30 November 2001
ISSN: 0277-786X
EISSN: 1996-756X
DOI: 10.1117/12.447365
Appears in Collections:Conference Paper

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