FULL-FIELD VIBROMETRY USING A FABRY-PEROT ETALON INTERFEROMETER

A solid lithium niobate Fabry-Perot etalon interferometer has been investigated with regard to its potential to perform full-field vibrometry. Predictions of theoretical system sensitivity were made based on signal-to-noise calculations. Optimized equations governing the etalon behavior were developed and examined in light of experimental results. The ability of the etalon system to accomplish multiple-(two-)-point simultaneous detection and full-field scanned vibrometry was demonstrated experimentally as well. The possibility of future work to obtain a snapshot image of an ultrasonic wave front is discussed.