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Proceedings Paper

Vibration measurement based on the optical cross-correlation technique with femtosecond pulsed laser
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Paper Abstract

Two vibration measurement methods with femtosecond pulsed laser based on the optical cross-correlation technique are presented independently in this paper. The balanced optical cross-correlation technique can reflect the time jitter between the reference pluses and measurement pluses by detecting second harmonic signals using type II phase-matched nonlinear crystal and balanced amplified photo-detectors. In the first method, with the purpose of attaining the vibration displacement, the time difference of the reference pulses relative to the measurement pluses can be measured using single femtosecond pulsed laser. In the second method, there are a couple of femtosecond pulsed lasers with high pulse repetition frequency. Vibration displacement associated with cavity length can be calculated by means of precisely measuring the pulse repetition frequency. The results show that the range of measurement attains ±150μm for a 500fs pulse. These methods will be suited for vibration displacement measurement, including laboratory use, field testing and industrial application.

Paper Details

Date Published: 19 October 2016
PDF: 7 pages
Proc. SPIE 10155, Optical Measurement Technology and Instrumentation, 101551H (19 October 2016); doi: 10.1117/12.2246553
Show Author Affiliations
Jibo Han, Aviation Industry Corp. of China (China)
Tengfei Wu, Aviation Industry Corp. of China (China)
Chunbo Zhao, Aviation Industry Corp. of China (China)
Shuyi Li, Aviation Industry Corp. of China (China)

Published in SPIE Proceedings Vol. 10155:
Optical Measurement Technology and Instrumentation
Sen Han; JiuBin Tan, Editor(s)

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