Ultrasonic sensing using Yb3+/Er3+-codoped distributed feedback fibre grating lasers.
Date
2005-02-01T00:00:00Z
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Publisher
Institute of Physics
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Type
Article
ISSN
0964-1726
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Citation
C-C Ye and R P Tatam; Ultrasonic sensing using Yb3+/Er3+-codoped distributed feedback fibre grating lasers. Smart Materials and Structures 2005, Vol. 14, No. 1, pp170-176
Abstract
Yb3+/Er3+-codoped distributed feedback (YbEr-DFB) fibre grating lasers have been investigated for the detection of ultrasonic Lamb waves generated in an aluminum plate. Two sensor configurations have been investigated. A path length imbalanced readout Mach- Zehnder interferometer was used to measure the laser frequency shift induced by ultrasonic vibration. The resolution to out-of-plane displacement was 3 x10-15 m/Ã Â Hz for a continuous ultrasonic wave at a frequency of 470 kHz. Ultrasonic waves were also detected by directly monitoring the laser output power. This simplified configuration is useful for tone burst AE signals generated by a low energy impact
Description
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Github
Keywords
Ultrasonic sensing, distributed feedback fibre laser, fibre Bragg grating, Yb3+/Er3+-codoped fibre
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Published by IOP Publishing. This is the Author Accepted Manuscript.
This article may be used for personal use only. The final published version (version of record) is available online at 10.1088/0964-1726/14/1/016. Please refer to any applicable publisher terms of use.