Cleary, A. and Veres, Istvan and Thursby, G.J. and McKee, C. and Armstrong, I. and Pierce, S.G. and Culshaw, B. (2010) Low power laser generated ultrasound : signal processing for time domain data acquisition. In: Laser Ultrasonics 2010, 2010-07-05 - 2010-07-08, Bordeaux, France.
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The use of low power modulated laser diode systems has previously been established as a suitable method for non-destructive laser generation of ultrasound. Using a quasi-continuous optical excitation amplified by an erbium-doped fibre amplifier (EDFA) allows flexible generation of ultrasonic waves, offering control of further parameters such as the frequency content or signal shape. In addition, pseudo-random binary sequences (PRBS) can be used to improve the detected impulse response. Here we compare two sequences, the m-sequence and the Golay code, and discuss the advantages and practical limits of their application with laser diode based optical excitation of ultrasound.
|Item type:||Conference or Workshop Item (Paper)|
|Keywords:||ultrasonics, lasers, ultrasound, low power, laser generated ultrasound, signal processing, time domain, data acquisition, Electrical engineering. Electronics Nuclear engineering|
|Subjects:||Technology > Electrical engineering. Electronics Nuclear engineering|
|Department:||Faculty of Engineering > Electronic and Electrical Engineering|
|Depositing user:||Dr Graham Thursby|
|Date Deposited:||01 Nov 2010 14:06|
|Last modified:||15 Apr 2015 10:08|
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