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Sensors 2016, 16(6), 928; doi:10.3390/s16060928

A Fiber-Coupled Self-Mixing Laser Diode for the Measurement of Young’s Modulus

1
School of Electrical, Computer and Telecommunications Engineering, University of Wollongong, Northfields Ave, Wollongong NSW 2522, Australia
2
School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, Wollongong NSW 2522, Australia
*
Author to whom correspondence should be addressed.
Academic Editor: Jose Miguel Lopez-Higuera
Received: 11 April 2016 / Revised: 30 May 2016 / Accepted: 10 June 2016 / Published: 22 June 2016
(This article belongs to the Special Issue Optical Fiber Sensors 2016)
View Full-Text   |   Download PDF [2655 KB, uploaded 22 June 2016]   |  

Abstract

This paper presents the design of a fiber-coupled self-mixing laser diode (SMLD) for non-contact and non-destructive measurement of Young’s modulus. By the presented measuring system, the Young’s modulus of aluminum 6061 and brass are measured as 70.0 GPa and 116.7 GPa, respectively, showing a good agreement within the standards in the literature and yielding a much smaller deviation and a higher repeatability compared with traditional tensile testing. Its fiber-coupled characteristics make the system quite easy to be installed in many application cases. View Full-Text
Keywords: fiber-coupled; self-mixing laser diode; self-mixing interferometry; fundamental resonant frequency; Young’s modulus fiber-coupled; self-mixing laser diode; self-mixing interferometry; fundamental resonant frequency; Young’s modulus
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Lin, K.; Yu, Y.; Xi, J.; Li, H.; Guo, Q.; Tong, J.; Su, L. A Fiber-Coupled Self-Mixing Laser Diode for the Measurement of Young’s Modulus. Sensors 2016, 16, 928.

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