Patent ID: 7612894
Filing Date: 2009-11-03
Classification: G01H,G01N

Abstract:
1. A method to detect ultrasonic surface displacements at a remote target comprising: generating ultrasonic displacements at a surface of the remote target; providing a diode pumped detection fiber laser comprising: generating a seed laser beam using the master oscillator; amplifying the seed laser beam to generate an output laser beam using the diode pumped laser pre-amplifier; amplifying the output laser beam using the diode pumped laser amplifier to thereby generate a detection laser beam; directing the detection laser beam to the surface of the remote target; scattering the detection laser beam with the ultrasonic surface displacements at the surface to produce phase modulated light; collecting the phase modulated light; processing the phase modulated light to obtain data representative of the ultrasonic surface displacements at the surface; and collecting the data with the information to analyze structures within the remote target.