Add to ORKGLaser generated ultrasound for nondestructive evaluation has an optical power density limit due to rapid high heating that causes material damage. This damage threshold limits the generated ultrasound amplitude, which impacts nondestructive evaluation inspection capability. To increase ultrasound signal levels and improve the ultrasound signal-to-noise ratio without exceeding laser power limitations, it is possible to use pulse compression techniques. The approach illustrated here uses a 150mW laser-diode modulated with a pseudo-random sequence and signal correlation. Results demonstrate the successful generation of ultrasonic bulk waves in aluminum and graphite-epoxy composite materials using a modulated low-power laser diode and illustrat...
Techniques for the successful excitation of guided ultrasonic waves using a low peak-power laser ult...
The use of pulsed lasers to generate ultrasound in the non-contact regime is a well documented techn...
An air-coupled micromachined silicon electrostatic transducer has been used to detect ultrasound gen...
Laser generated ultrasound systems have historically been more complicated and expensive than conven...
The use of low power modulated laser diode systems has previously been established as a suitable met...
We describe how the application of maximum-length sequence (m-sequence) coding can be used to improv...
Ultrasonic nondestructive evaluation is an extremely powerful tool for characterizing materials and ...
We present our perspectives on using laser ultrasound, coupled with optical detection, to characteri...
Laser-ultrasound has demonstrated important cost saving for the inspection of aircraft components in...
There has been a lot of recent interest in the use of pulsed lasers for the generation of ultrasound...
High frequency two-dimensional phased arrays for ultrasound microscopy are difficult to construct us...
The generation and detection of ultrasound with lasers has evolved to become a useful laboratory too...
Ultrasound has become a major medical imaging modality whose performance continues to improve among ...
In optically opaque solids broadband ultrasonic pulses can be generated by short laser pulses via th...
Techniques for the successful excitation of guided ultrasonic waves using a low peak-power laser ult...
The use of pulsed lasers to generate ultrasound in the non-contact regime is a well documented techn...
An air-coupled micromachined silicon electrostatic transducer has been used to detect ultrasound gen...
Laser generated ultrasound systems have historically been more complicated and expensive than conven...
The use of low power modulated laser diode systems has previously been established as a suitable met...
We describe how the application of maximum-length sequence (m-sequence) coding can be used to improv...
Ultrasonic nondestructive evaluation is an extremely powerful tool for characterizing materials and ...
We present our perspectives on using laser ultrasound, coupled with optical detection, to characteri...
Laser-ultrasound has demonstrated important cost saving for the inspection of aircraft components in...
There has been a lot of recent interest in the use of pulsed lasers for the generation of ultrasound...
High frequency two-dimensional phased arrays for ultrasound microscopy are difficult to construct us...
The generation and detection of ultrasound with lasers has evolved to become a useful laboratory too...
Ultrasound has become a major medical imaging modality whose performance continues to improve among ...
In optically opaque solids broadband ultrasonic pulses can be generated by short laser pulses via th...
Techniques for the successful excitation of guided ultrasonic waves using a low peak-power laser ult...
The use of pulsed lasers to generate ultrasound in the non-contact regime is a well documented techn...
An air-coupled micromachined silicon electrostatic transducer has been used to detect ultrasound gen...