Coding methods for low power laser generation of ultrasound

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

Research output: Contribution to conferencePaper

3 Citations (Scopus)


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 languageEnglish
Number of pages8
Publication statusPublished - Jul 2009
Event2010 Review of Progress in Quantitative Nondestructive Evaluation - Kingston, Rhode Island, United States
Duration: 26 Jul 201031 Jul 2010


Conference2010 Review of Progress in Quantitative Nondestructive Evaluation
CountryUnited States
CityKingston, Rhode Island


  • ultrasonic effects
  • semiconductor lasers
  • crystal microstructure
  • signal processing

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