Multifrequency laser beam use in an interferometer vibration measuring system

Oksana P Budnyk; Ruslan A Lymarenko

doi:10.1117/12.500282

30 May 2003 Multifrequency laser beam use in an interferometer vibration measuring system

Oksana P Budnyk, Ruslan A Lymarenko

Proceedings Volume 5144, Optical Measurement Systems for Industrial Inspection III; (2003) https://doi.org/10.1117/12.500282
Event: Optical Metrology, 2003, Munich, Germany

Abstract

It was discussed the using multi-frequency YAG:Nd infrared laser for long range non-destructive acoustic vibration measuring system for structural modal analysis. It was shown both theoretically and experimentally that a coherent function of a laser with acousto-optic device has an oscillations with the period depending on a laser cavity length and a number of resonator modes. The advantages of using the acousto-optic devices in a tandem scheme were discussed. The adjustment of such system due to on-axis shift is suitable for object selection. It was shown that the coherence function has optimal form for selecting a transparent object on light beam trace and optical delay line for semiconductor laser with short resonator can tune on maximum of coherent function at long distance. Accordingly the mutli-frequency laser can be used in heterodyne optical scheme instead of more costly stable one-frequency laser. A simple scheme of velocity measuring based on a semiconductive two-mode laser was proposed. Conclusions regarding the possibility using the resonator with acousto-optic device inside with a frequency chirp beam using for interferometer phase modulation measure system are arrived at. The application of a frequency-shifted laser beam to practical optical measuring system may improve the processing efficiency without additional adjustments.

Citation Download Citation

Oksana P Budnyk and Ruslan A Lymarenko "Multifrequency laser beam use in an interferometer vibration measuring system", Proc. SPIE 5144, Optical Measurement Systems for Industrial Inspection III, (30 May 2003); https://doi.org/10.1117/12.500282

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available