Improving the signal-to-noise ratio of a fiber optic laser Doppler vibrometer

Giulio D'Emilia

doi:10.1117/12.255368

25 October 1996 Improving the signal-to-noise ratio of a fiber optic laser Doppler vibrometer

Giulio D'Emilia

Proceedings Volume 2839, Fiber Optic and Laser Sensors XIV; (1996) https://doi.org/10.1117/12.255368
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

In this paper possible ways of increasing the signal to noise ratio of a laser Doppler vibrometer with fiber optic components are discussed, in order to improve its metrological characteristics and to enlarge its field of possible industrial applications. System improvements, related to the frequency shifting block of the vibrometer, to its photodetector stage and to the optical head, which recovers the light scattered by a vibrating target, have been experimentally evaluated. It must be noticed that this activity has been carried out taking into account the requirement of simplicity and handiness of the measurement system and using solutions from both an optical and an electronic point of view, which are inexpensive as much as possible.

Citation Download Citation

Giulio D'Emilia "Improving the signal-to-noise ratio of a fiber optic laser Doppler vibrometer", Proc. SPIE 2839, Fiber Optic and Laser Sensors XIV, (25 October 1996); https://doi.org/10.1117/12.255368

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