Share Email Print

Proceedings Paper

Self-induced electro-optic modulator: a new approach for homodyne detection of ultrasonic surface displacement
Author(s): Alexei A. Kamshilin; Kimmo Paivasaari; Nadezhda Nazhestkina
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

New interferometric technique based on the polarization of self-modulation (PSM) effect in photoconductive electrooptic crystals for the linear detection of small out-of-plane vibrations of a rough surface caused by ultrasound is described. The technique is more advantageous than the widely used photorefractive two-wave mixing technique. Basing on the vectorial theory of light diffraction in photorefractive crystals of cubic symmetry, the procedure of the PSM-interferometer optimization is proposed. The highest sensitivity of a PSM interferometer with fast semiconductor crystals is achieved in the transversal configuration when both the external electric field and grating vector are parallel to the <110> axis. The sensitivity of the adaptive PSM-interferometer is only two times smaller than the sensitivity of the classical homodyne interferometer.

Paper Details

Date Published: 8 March 2001
PDF: 10 pages
Proc. SPIE 4318, Smart Optical Inorganic Structures and Devices, (8 March 2001); doi: 10.1117/12.417619
Show Author Affiliations
Alexei A. Kamshilin, Univ. of Joensuu (Finland)
Kimmo Paivasaari, Univ. of Joensuu (Finland)
Nadezhda Nazhestkina, Univ. of Joensuu (Finland)

Published in SPIE Proceedings Vol. 4318:
Smart Optical Inorganic Structures and Devices
Steponas P. Asmontas; Jonas Gradauskas, Editor(s)

© SPIE. Terms of Use
Back to Top