10.1109/ULTSYM.2009.5441959">
 

Heterodyne laser-Doppler interferometric characterization of contour-mode resonators above 1 GHz

Document Type

Conference Proceeding

Publication Date

2009

Abstract

This paper reports the design and optical characterization of PZT transduced high-overtone width-extensional mode resonators with resonance frequency above 1 GHz. For the first time, a novel technique to measure resonance frequencies and vibrations of contour-mode resonators optically up to 1.2 GHz using only a 618 MHz carrier frequency is demonstrated. The output signal from the photo detector of the vibrometer is digitized by a fast digital oscilloscope and demodulated off-line in a computer. A signal processing algorithm has been developed to acquire frequency components from the photo detector which are higher than the carrier frequency to construct I and Q (in-phase and quadrature) signals from a virtual carrier signal with frequency 2x of the original carrier frequency. This method enabled us to realize an algorithm to extend the measurement bandwidth by a factor of 2 for small vibration amplitudes (< 20 nm).

Comments

This conference paper is available to IEEE Electronic Library subscribers via the DOI link below.

Current AFIT students, faculty and staff may access the paper by clicking here.

Source Publication

IEEE International Ultrasonics Symposium 2009

This document is currently not available here.

Share

COinS