Optical lock-in vibration detection using photorefractive frequency domain processing

Journal Article · Tue Oct 01 00:00:00 EDT 1996 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.117541· OSTI ID:388144

Hale, T C; Telschow, K ^[1]

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1. Idaho National Engineering Laboratory, Idaho Falls, Idaho 83415-2209 (United States)

An optical method for vibration detection and spectral analysis based on photorefractive frequency domain processing is presented. The method utilizes the photorefractive effect in selected materials (bismuth silicon oxide) for synchronous detection of the optical phase shift of an object beam scattered from a vibrating specimen surface. Four-wave mixing and lock-in detection allow measurement of both the vibration amplitude and phase. Narrow-bandwidth detection can be achieved at frequencies from the photorefractive response limit to the reciprocal of the photoinduced carrier recombination time. {copyright} {ital 1996 American Institute of Physics.}

• Research Organization: Idaho National Engineering Lab
• DOE Contract Number: AC07-94ID13223
• OSTI ID: 388144
• Journal Information: Applied Physics Letters, Vol. 69, Issue 18; Other Information: PBD: Oct 1996
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES
MECHANICAL VIBRATIONS
NONDESTRUCTIVE TESTING
FREQUENCY ANALYSIS
BISMUTH OXIDES
SILICON OXIDES
FREQUENCY MIXING
PHASE SHIFT
NONLINEAR OPTICS
FREQUENCY DOMAIN ANALYSIS
PHOTOREFRACTIVE EFFECT