Coding methods for low power laser generation of ultrasound

A. Cleary; I.A. Veres; G.J. Thursby; C. McKee; S.G. Pierce; B. Culshaw

doi:10.1063/1.3362404

Coding methods for low power laser generation of ultrasound

A. Cleary, I.A. Veres, G.J. Thursby, C. McKee, S.G. Pierce, B. Culshaw

Electronic And Electrical Engineering

Research output: Contribution to conference › Paper

3 Citations (Scopus)

Abstract

We describe how the application of maximum-length sequence (m-sequence) coding can be used to improve the measured signal-to-noise ratio of ultrasonic waves generated by a low power laser diode. Lamb waves were generated in thin metallic plates using a pulsed excitation. To improve the signal-to-noise ratio of the detected signal, various signal processing methods have been evaluated, with m-sequences described here. We also show how the spectral content of the ultrasonic wave can be controlled by using a modified m-sequence approach

Original language	English
Pages	271-278
Number of pages	8
DOIs	https://doi.org/10.1063/1.3362404
Publication status	Published - Jul 2009
Event	2010 Review of Progress in Quantitative Nondestructive Evaluation - Kingston, Rhode Island, United States Duration: 26 Jul 2010 → 31 Jul 2010

Conference

Conference	2010 Review of Progress in Quantitative Nondestructive Evaluation
Country	United States
City	Kingston, Rhode Island
Period	26/07/10 → 31/07/10

Keywords

ultrasonic effects
semiconductor lasers
crystal microstructure
signal processing

Access to Document

10.1063/1.3362404

1 Finished

PGII: Generation, Detection & Analysis of Optimally Coded Ultrasonic Waveforms
Gachagan, A., Hayward, G., Mulholland, A. & Pierce, G.
EPSRC (Engineering and Physical Sciences Research Council)
9/06/08 → 9/09/12
Project: Research

Cite this

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title = "Coding methods for low power laser generation of ultrasound",

abstract = "We describe how the application of maximum-length sequence (m-sequence) coding can be used to improve the measured signal-to-noise ratio of ultrasonic waves generated by a low power laser diode. Lamb waves were generated in thin metallic plates using a pulsed excitation. To improve the signal-to-noise ratio of the detected signal, various signal processing methods have been evaluated, with m-sequences described here. We also show how the spectral content of the ultrasonic wave can be controlled by using a modified m-sequence approach",

keywords = "ultrasonic effects , semiconductor lasers , crystal microstructure, signal processing",

author = "A. Cleary and I.A. Veres and G.J. Thursby and C. McKee and S.G. Pierce and B. Culshaw",

year = "2009",

month = jul,

doi = "10.1063/1.3362404",

language = "English",

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note = "2010 Review of Progress in Quantitative Nondestructive Evaluation ; Conference date: 26-07-2010 Through 31-07-2010",

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T1 - Coding methods for low power laser generation of ultrasound

AU - Cleary, A.

AU - Veres, I.A.

AU - Thursby, G.J.

AU - McKee, C.

AU - Pierce, S.G.

AU - Culshaw, B.

PY - 2009/7

Y1 - 2009/7

N2 - We describe how the application of maximum-length sequence (m-sequence) coding can be used to improve the measured signal-to-noise ratio of ultrasonic waves generated by a low power laser diode. Lamb waves were generated in thin metallic plates using a pulsed excitation. To improve the signal-to-noise ratio of the detected signal, various signal processing methods have been evaluated, with m-sequences described here. We also show how the spectral content of the ultrasonic wave can be controlled by using a modified m-sequence approach

AB - We describe how the application of maximum-length sequence (m-sequence) coding can be used to improve the measured signal-to-noise ratio of ultrasonic waves generated by a low power laser diode. Lamb waves were generated in thin metallic plates using a pulsed excitation. To improve the signal-to-noise ratio of the detected signal, various signal processing methods have been evaluated, with m-sequences described here. We also show how the spectral content of the ultrasonic wave can be controlled by using a modified m-sequence approach

KW - ultrasonic effects

KW - semiconductor lasers

KW - crystal microstructure

KW - signal processing

U2 - 10.1063/1.3362404

DO - 10.1063/1.3362404

M3 - Paper

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T2 - 2010 Review of Progress in Quantitative Nondestructive Evaluation

Y2 - 26 July 2010 through 31 July 2010

ER -

Coding methods for low power laser generation of ultrasound

Abstract

Conference

Keywords

Access to Document

PGII: Generation, Detection & Analysis of Optimally Coded Ultrasonic Waveforms

Cite this