Multichannel fiber optic laser vibrometer

Rupak Changkakoti; Roman V. Kruzelecky; Asoke Kumar Ghosh; Wanping Zheng

doi:10.1117/12.323515

24 September 1998 Multichannel fiber optic laser vibrometer

Rupak Changkakoti, Roman V. Kruzelecky, Asoke Kumar Ghosh, Wanping Zheng

Proceedings Volume 3414, Opto-Contact: Workshop on Technology Transfers, Start-Up Opportunities,and Strategic Alliances; (1998) https://doi.org/10.1117/12.323515
Event: Lasers and Materials in Industry and Opto-Contact Workshop, 1998, Quebec, Canada

Abstract

A non-contact nine channel fiber optic laser vibrometer has been developed to measure the vibrations of low mass flexible space structures. The Multi-Channel Fiber optic VIBrometer (MCFVIB) system is based on a commercial single channel laser vibrometer and a fiber-optic distribution system. This entailed the development of appropriate systems architecture for the optical signals, active 1 X 9 optical switch, and optical sensor heads suitable for coupling the reflected test signal back into the fiber optic system. MCFVIB employs single-mode, polarization maintaining fibers to maintain the signal coherence. The performance of the MCFVIB was tested at various vibrational frequencies using a shaker. Correlation of the measurements against those measured by an accelerometer indicate excellent linearity and accuracy for the fiber optic vibrometer system.

Citation Download Citation

Rupak Changkakoti, Roman V. Kruzelecky, Asoke Kumar Ghosh, and Wanping Zheng "Multichannel fiber optic laser vibrometer", Proc. SPIE 3414, Opto-Contact: Workshop on Technology Transfers, Start-Up Opportunities,and Strategic Alliances, (24 September 1998); https://doi.org/10.1117/12.323515

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