Bragg cell and rotating grating frequency shifting in laser vibrometer: a metrological and operating comparison

Giulio D'Emilia; Francesco Iaconis; Enrico Nino

doi:10.1117/12.248625

23 August 1996 Bragg cell and rotating grating frequency shifting in laser vibrometer: a metrological and operating comparison

Giulio D'Emilia, Francesco Iaconis, Enrico Nino

Author Affiliations +

Proceedings Volume 2868, Second International Conference on Vibration Measurements by Laser Techniques: Advances and Applications; (1996) https://doi.org/10.1117/12.248625
Event: Second International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, 1996, Ancona, Italy

Abstract

An experimental comparison has been carried out between two laser Doppler vibrometers, different as for frequency shift generation between measuring and reference beam of the interferometer. In particular, two systems, based either on a Bragg cell or on a rotating diffraction grating for frequency shifting, have been compared, with reference to both metrological and operating behavior. Based on the analysis of experimental information, a quantitative evaluation has been carried out of the effect on either optical configuration of the most typical operative parameters to be taken into account in laser Doppler vibrometry, in order to define the best optical lay-out and configuration depending on the specific industrial application.

Citation Download Citation

Giulio D'Emilia, Francesco Iaconis, and Enrico Nino "Bragg cell and rotating grating frequency shifting in laser vibrometer: a metrological and operating comparison", Proc. SPIE 2868, Second International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (23 August 1996); https://doi.org/10.1117/12.248625

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