Nonlinear optical adaptive photodetectors for remote sensing: application to ultrasound detection

In recent years, there has been a need for improved basic materials evaluation during and after processing. In particular, there is a need for nondestructive, noncontact characterization of critical materials without mechanical loading, inspection of welds, surface treatments of metals, as well as in-process evaluation of composites and microelectronics components for elastic properties, material flaws and delamination. We will highlight a novel all-optical technology in this regard: laser-based ultrasonic inspection of critical materials, bonds, and processes.